CVE-2023-53369 (GCVE-0-2023-53369)

Vulnerability from cvelistv5 – Published: 2025-09-18 13:33 – Updated: 2026-01-14 19:03
VLAI?
Title
net: dcb: choose correct policy to parse DCB_ATTR_BCN
Summary
In the Linux kernel, the following vulnerability has been resolved: net: dcb: choose correct policy to parse DCB_ATTR_BCN The dcbnl_bcn_setcfg uses erroneous policy to parse tb[DCB_ATTR_BCN], which is introduced in commit 859ee3c43812 ("DCB: Add support for DCB BCN"). Please see the comment in below code static int dcbnl_bcn_setcfg(...) { ... ret = nla_parse_nested_deprecated(..., dcbnl_pfc_up_nest, .. ) // !!! dcbnl_pfc_up_nest for attributes // DCB_PFC_UP_ATTR_0 to DCB_PFC_UP_ATTR_ALL in enum dcbnl_pfc_up_attrs ... for (i = DCB_BCN_ATTR_RP_0; i <= DCB_BCN_ATTR_RP_7; i++) { // !!! DCB_BCN_ATTR_RP_0 to DCB_BCN_ATTR_RP_7 in enum dcbnl_bcn_attrs ... value_byte = nla_get_u8(data[i]); ... } ... for (i = DCB_BCN_ATTR_BCNA_0; i <= DCB_BCN_ATTR_RI; i++) { // !!! DCB_BCN_ATTR_BCNA_0 to DCB_BCN_ATTR_RI in enum dcbnl_bcn_attrs ... value_int = nla_get_u32(data[i]); ... } ... } That is, the nla_parse_nested_deprecated uses dcbnl_pfc_up_nest attributes to parse nlattr defined in dcbnl_pfc_up_attrs. But the following access code fetch each nlattr as dcbnl_bcn_attrs attributes. By looking up the associated nla_policy for dcbnl_bcn_attrs. We can find the beginning part of these two policies are "same". static const struct nla_policy dcbnl_pfc_up_nest[...] = { [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8}, [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG}, }; static const struct nla_policy dcbnl_bcn_nest[...] = { [DCB_BCN_ATTR_RP_0] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_1] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_2] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_3] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_4] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_5] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_6] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_7] = {.type = NLA_U8}, [DCB_BCN_ATTR_RP_ALL] = {.type = NLA_FLAG}, // from here is somewhat different [DCB_BCN_ATTR_BCNA_0] = {.type = NLA_U32}, ... [DCB_BCN_ATTR_ALL] = {.type = NLA_FLAG}, }; Therefore, the current code is buggy and this nla_parse_nested_deprecated could overflow the dcbnl_pfc_up_nest and use the adjacent nla_policy to parse attributes from DCB_BCN_ATTR_BCNA_0. Hence use the correct policy dcbnl_bcn_nest to parse the nested tb[DCB_ATTR_BCN] TLV.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 859ee3c43812051e21816c6d6d4cc04fb7ce9b2e , < 5b3dbedb8d4a0f9f7ce904d76b885438af2a21f9 (git)
Affected: 859ee3c43812051e21816c6d6d4cc04fb7ce9b2e , < 8e309f43d0ca4051d20736c06a6f84bbddd881da (git)
Affected: 859ee3c43812051e21816c6d6d4cc04fb7ce9b2e , < a0da2684db18dead3bcee12fb185e596e3d63c2b (git)
Affected: 859ee3c43812051e21816c6d6d4cc04fb7ce9b2e , < ecff20e193207b44fdbfe64d7de89890f0a7fe6c (git)
Affected: 859ee3c43812051e21816c6d6d4cc04fb7ce9b2e , < 199fde04bd875d28b3a5ca525eaaa004eec6e947 (git)
Affected: 859ee3c43812051e21816c6d6d4cc04fb7ce9b2e , < 31d49ba033095f6e8158c60f69714a500922e0c3 (git)
Create a notification for this product.
    Linux Linux Affected: 2.6.29
Unaffected: 0 , < 2.6.29 (semver)
Unaffected: 5.4.253 , ≤ 5.4.* (semver)
Unaffected: 5.10.190 , ≤ 5.10.* (semver)
Unaffected: 5.15.126 , ≤ 5.15.* (semver)
Unaffected: 6.1.45 , ≤ 6.1.* (semver)
Unaffected: 6.4.10 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2023-53369",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T18:53:02.602085Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "description": "CWE-noinfo Not enough information",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T19:03:02.451Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/dcb/dcbnl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5b3dbedb8d4a0f9f7ce904d76b885438af2a21f9",
              "status": "affected",
              "version": "859ee3c43812051e21816c6d6d4cc04fb7ce9b2e",
              "versionType": "git"
            },
            {
              "lessThan": "8e309f43d0ca4051d20736c06a6f84bbddd881da",
              "status": "affected",
              "version": "859ee3c43812051e21816c6d6d4cc04fb7ce9b2e",
              "versionType": "git"
            },
            {
              "lessThan": "a0da2684db18dead3bcee12fb185e596e3d63c2b",
              "status": "affected",
              "version": "859ee3c43812051e21816c6d6d4cc04fb7ce9b2e",
              "versionType": "git"
            },
            {
              "lessThan": "ecff20e193207b44fdbfe64d7de89890f0a7fe6c",
              "status": "affected",
              "version": "859ee3c43812051e21816c6d6d4cc04fb7ce9b2e",
              "versionType": "git"
            },
            {
              "lessThan": "199fde04bd875d28b3a5ca525eaaa004eec6e947",
              "status": "affected",
              "version": "859ee3c43812051e21816c6d6d4cc04fb7ce9b2e",
              "versionType": "git"
            },
            {
              "lessThan": "31d49ba033095f6e8158c60f69714a500922e0c3",
              "status": "affected",
              "version": "859ee3c43812051e21816c6d6d4cc04fb7ce9b2e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/dcb/dcbnl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.29"
            },
            {
              "lessThan": "2.6.29",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.253",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.190",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.126",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.253",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.190",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.126",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.45",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.10",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dcb: choose correct policy to parse DCB_ATTR_BCN\n\nThe dcbnl_bcn_setcfg uses erroneous policy to parse tb[DCB_ATTR_BCN],\nwhich is introduced in commit 859ee3c43812 (\"DCB: Add support for DCB\nBCN\"). Please see the comment in below code\n\nstatic int dcbnl_bcn_setcfg(...)\n{\n  ...\n  ret = nla_parse_nested_deprecated(..., dcbnl_pfc_up_nest, .. )\n  // !!! dcbnl_pfc_up_nest for attributes\n  //  DCB_PFC_UP_ATTR_0 to DCB_PFC_UP_ATTR_ALL in enum dcbnl_pfc_up_attrs\n  ...\n  for (i = DCB_BCN_ATTR_RP_0; i \u003c= DCB_BCN_ATTR_RP_7; i++) {\n  // !!! DCB_BCN_ATTR_RP_0 to DCB_BCN_ATTR_RP_7 in enum dcbnl_bcn_attrs\n    ...\n    value_byte = nla_get_u8(data[i]);\n    ...\n  }\n  ...\n  for (i = DCB_BCN_ATTR_BCNA_0; i \u003c= DCB_BCN_ATTR_RI; i++) {\n  // !!! DCB_BCN_ATTR_BCNA_0 to DCB_BCN_ATTR_RI in enum dcbnl_bcn_attrs\n  ...\n    value_int = nla_get_u32(data[i]);\n  ...\n  }\n  ...\n}\n\nThat is, the nla_parse_nested_deprecated uses dcbnl_pfc_up_nest\nattributes to parse nlattr defined in dcbnl_pfc_up_attrs. But the\nfollowing access code fetch each nlattr as dcbnl_bcn_attrs attributes.\nBy looking up the associated nla_policy for dcbnl_bcn_attrs. We can find\nthe beginning part of these two policies are \"same\".\n\nstatic const struct nla_policy dcbnl_pfc_up_nest[...] = {\n        [DCB_PFC_UP_ATTR_0]   = {.type = NLA_U8},\n        [DCB_PFC_UP_ATTR_1]   = {.type = NLA_U8},\n        [DCB_PFC_UP_ATTR_2]   = {.type = NLA_U8},\n        [DCB_PFC_UP_ATTR_3]   = {.type = NLA_U8},\n        [DCB_PFC_UP_ATTR_4]   = {.type = NLA_U8},\n        [DCB_PFC_UP_ATTR_5]   = {.type = NLA_U8},\n        [DCB_PFC_UP_ATTR_6]   = {.type = NLA_U8},\n        [DCB_PFC_UP_ATTR_7]   = {.type = NLA_U8},\n        [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},\n};\n\nstatic const struct nla_policy dcbnl_bcn_nest[...] = {\n        [DCB_BCN_ATTR_RP_0]         = {.type = NLA_U8},\n        [DCB_BCN_ATTR_RP_1]         = {.type = NLA_U8},\n        [DCB_BCN_ATTR_RP_2]         = {.type = NLA_U8},\n        [DCB_BCN_ATTR_RP_3]         = {.type = NLA_U8},\n        [DCB_BCN_ATTR_RP_4]         = {.type = NLA_U8},\n        [DCB_BCN_ATTR_RP_5]         = {.type = NLA_U8},\n        [DCB_BCN_ATTR_RP_6]         = {.type = NLA_U8},\n        [DCB_BCN_ATTR_RP_7]         = {.type = NLA_U8},\n        [DCB_BCN_ATTR_RP_ALL]       = {.type = NLA_FLAG},\n        // from here is somewhat different\n        [DCB_BCN_ATTR_BCNA_0]       = {.type = NLA_U32},\n        ...\n        [DCB_BCN_ATTR_ALL]          = {.type = NLA_FLAG},\n};\n\nTherefore, the current code is buggy and this\nnla_parse_nested_deprecated could overflow the dcbnl_pfc_up_nest and use\nthe adjacent nla_policy to parse attributes from DCB_BCN_ATTR_BCNA_0.\n\nHence use the correct policy dcbnl_bcn_nest to parse the nested\ntb[DCB_ATTR_BCN] TLV."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-18T13:33:17.384Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5b3dbedb8d4a0f9f7ce904d76b885438af2a21f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/8e309f43d0ca4051d20736c06a6f84bbddd881da"
        },
        {
          "url": "https://git.kernel.org/stable/c/a0da2684db18dead3bcee12fb185e596e3d63c2b"
        },
        {
          "url": "https://git.kernel.org/stable/c/ecff20e193207b44fdbfe64d7de89890f0a7fe6c"
        },
        {
          "url": "https://git.kernel.org/stable/c/199fde04bd875d28b3a5ca525eaaa004eec6e947"
        },
        {
          "url": "https://git.kernel.org/stable/c/31d49ba033095f6e8158c60f69714a500922e0c3"
        }
      ],
      "title": "net: dcb: choose correct policy to parse DCB_ATTR_BCN",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53369",
    "datePublished": "2025-09-18T13:33:17.384Z",
    "dateReserved": "2025-09-17T14:54:09.734Z",
    "dateUpdated": "2026-01-14T19:03:02.451Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-53369\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T18:53:02.602085Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"description\": \"CWE-noinfo Not enough information\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T18:52:56.756Z\"}}], \"cna\": {\"title\": \"net: dcb: choose correct policy to parse DCB_ATTR_BCN\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\", \"lessThan\": \"5b3dbedb8d4a0f9f7ce904d76b885438af2a21f9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\", \"lessThan\": \"8e309f43d0ca4051d20736c06a6f84bbddd881da\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\", \"lessThan\": \"a0da2684db18dead3bcee12fb185e596e3d63c2b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\", \"lessThan\": \"ecff20e193207b44fdbfe64d7de89890f0a7fe6c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\", \"lessThan\": \"199fde04bd875d28b3a5ca525eaaa004eec6e947\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"859ee3c43812051e21816c6d6d4cc04fb7ce9b2e\", \"lessThan\": \"31d49ba033095f6e8158c60f69714a500922e0c3\", \"versionType\": \"git\"}], \"programFiles\": [\"net/dcb/dcbnl.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.29\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.29\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.253\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.190\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.126\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.45\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.4.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.4.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/dcb/dcbnl.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5b3dbedb8d4a0f9f7ce904d76b885438af2a21f9\"}, {\"url\": \"https://git.kernel.org/stable/c/8e309f43d0ca4051d20736c06a6f84bbddd881da\"}, {\"url\": \"https://git.kernel.org/stable/c/a0da2684db18dead3bcee12fb185e596e3d63c2b\"}, {\"url\": \"https://git.kernel.org/stable/c/ecff20e193207b44fdbfe64d7de89890f0a7fe6c\"}, {\"url\": \"https://git.kernel.org/stable/c/199fde04bd875d28b3a5ca525eaaa004eec6e947\"}, {\"url\": \"https://git.kernel.org/stable/c/31d49ba033095f6e8158c60f69714a500922e0c3\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: dcb: choose correct policy to parse DCB_ATTR_BCN\\n\\nThe dcbnl_bcn_setcfg uses erroneous policy to parse tb[DCB_ATTR_BCN],\\nwhich is introduced in commit 859ee3c43812 (\\\"DCB: Add support for DCB\\nBCN\\\"). Please see the comment in below code\\n\\nstatic int dcbnl_bcn_setcfg(...)\\n{\\n  ...\\n  ret = nla_parse_nested_deprecated(..., dcbnl_pfc_up_nest, .. )\\n  // !!! dcbnl_pfc_up_nest for attributes\\n  //  DCB_PFC_UP_ATTR_0 to DCB_PFC_UP_ATTR_ALL in enum dcbnl_pfc_up_attrs\\n  ...\\n  for (i = DCB_BCN_ATTR_RP_0; i \u003c= DCB_BCN_ATTR_RP_7; i++) {\\n  // !!! DCB_BCN_ATTR_RP_0 to DCB_BCN_ATTR_RP_7 in enum dcbnl_bcn_attrs\\n    ...\\n    value_byte = nla_get_u8(data[i]);\\n    ...\\n  }\\n  ...\\n  for (i = DCB_BCN_ATTR_BCNA_0; i \u003c= DCB_BCN_ATTR_RI; i++) {\\n  // !!! DCB_BCN_ATTR_BCNA_0 to DCB_BCN_ATTR_RI in enum dcbnl_bcn_attrs\\n  ...\\n    value_int = nla_get_u32(data[i]);\\n  ...\\n  }\\n  ...\\n}\\n\\nThat is, the nla_parse_nested_deprecated uses dcbnl_pfc_up_nest\\nattributes to parse nlattr defined in dcbnl_pfc_up_attrs. But the\\nfollowing access code fetch each nlattr as dcbnl_bcn_attrs attributes.\\nBy looking up the associated nla_policy for dcbnl_bcn_attrs. We can find\\nthe beginning part of these two policies are \\\"same\\\".\\n\\nstatic const struct nla_policy dcbnl_pfc_up_nest[...] = {\\n        [DCB_PFC_UP_ATTR_0]   = {.type = NLA_U8},\\n        [DCB_PFC_UP_ATTR_1]   = {.type = NLA_U8},\\n        [DCB_PFC_UP_ATTR_2]   = {.type = NLA_U8},\\n        [DCB_PFC_UP_ATTR_3]   = {.type = NLA_U8},\\n        [DCB_PFC_UP_ATTR_4]   = {.type = NLA_U8},\\n        [DCB_PFC_UP_ATTR_5]   = {.type = NLA_U8},\\n        [DCB_PFC_UP_ATTR_6]   = {.type = NLA_U8},\\n        [DCB_PFC_UP_ATTR_7]   = {.type = NLA_U8},\\n        [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},\\n};\\n\\nstatic const struct nla_policy dcbnl_bcn_nest[...] = {\\n        [DCB_BCN_ATTR_RP_0]         = {.type = NLA_U8},\\n        [DCB_BCN_ATTR_RP_1]         = {.type = NLA_U8},\\n        [DCB_BCN_ATTR_RP_2]         = {.type = NLA_U8},\\n        [DCB_BCN_ATTR_RP_3]         = {.type = NLA_U8},\\n        [DCB_BCN_ATTR_RP_4]         = {.type = NLA_U8},\\n        [DCB_BCN_ATTR_RP_5]         = {.type = NLA_U8},\\n        [DCB_BCN_ATTR_RP_6]         = {.type = NLA_U8},\\n        [DCB_BCN_ATTR_RP_7]         = {.type = NLA_U8},\\n        [DCB_BCN_ATTR_RP_ALL]       = {.type = NLA_FLAG},\\n        // from here is somewhat different\\n        [DCB_BCN_ATTR_BCNA_0]       = {.type = NLA_U32},\\n        ...\\n        [DCB_BCN_ATTR_ALL]          = {.type = NLA_FLAG},\\n};\\n\\nTherefore, the current code is buggy and this\\nnla_parse_nested_deprecated could overflow the dcbnl_pfc_up_nest and use\\nthe adjacent nla_policy to parse attributes from DCB_BCN_ATTR_BCNA_0.\\n\\nHence use the correct policy dcbnl_bcn_nest to parse the nested\\ntb[DCB_ATTR_BCN] TLV.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.253\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.190\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.126\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.45\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4.10\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5\", \"versionStartIncluding\": \"2.6.29\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-09-18T13:33:17.384Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-53369\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-14T19:03:02.451Z\", \"dateReserved\": \"2025-09-17T14:54:09.734Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-18T13:33:17.384Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.