CVE-2024-26883 (GCVE-0-2024-26883)

Vulnerability from cvelistv5 – Published: 2024-04-17 10:27 – Updated: 2025-05-04 12:55
VLAI?
Title
bpf: Fix stackmap overflow check on 32-bit arches
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix stackmap overflow check on 32-bit arches The stackmap code relies on roundup_pow_of_two() to compute the number of hash buckets, and contains an overflow check by checking if the resulting value is 0. However, on 32-bit arches, the roundup code itself can overflow by doing a 32-bit left-shift of an unsigned long value, which is undefined behaviour, so it is not guaranteed to truncate neatly. This was triggered by syzbot on the DEVMAP_HASH type, which contains the same check, copied from the hashtab code. The commit in the fixes tag actually attempted to fix this, but the fix did not account for the UB, so the fix only works on CPUs where an overflow does result in a neat truncation to zero, which is not guaranteed. Checking the value before rounding does not have this problem.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 063c722dd9d285d877e6fd499e753d6224f4c046 , < d0e214acc59145ce25113f617311aa79dda39cb3 (git)
Affected: 7e3a6b820535eb395784060ae26c5af579528fa0 , < 21e5fa4688e1a4d3db6b72216231b24232f75c1d (git)
Affected: 8032bf2af9ce26b3a362b9711d15f626ab946a74 , < 15641007df0f0d35fa28742b25c2a7db9dcd6895 (git)
Affected: 6183f4d3a0a2ad230511987c6c362ca43ec0055f , < ca1f06e72dec41ae4f76e7b1a8a97265447b46ae (git)
Affected: 6183f4d3a0a2ad230511987c6c362ca43ec0055f , < f06899582ccee09bd85d0696290e3eaca9aa042d (git)
Affected: 6183f4d3a0a2ad230511987c6c362ca43ec0055f , < 7070b274c7866a4c5036f8d54fcaf315c64ac33a (git)
Affected: 6183f4d3a0a2ad230511987c6c362ca43ec0055f , < 43f798b9036491fb014b55dd61c4c5c3193267d0 (git)
Affected: 6183f4d3a0a2ad230511987c6c362ca43ec0055f , < 0971126c8164abe2004b8536b49690a0d6005b0a (git)
Affected: 6183f4d3a0a2ad230511987c6c362ca43ec0055f , < 7a4b21250bf79eef26543d35bd390448646c536b (git)
Affected: 253150830a012adfccf90afcebae8fda5b05a80f (git)
Affected: 766107351731ae223ebf60ca22bdfeb47ce6acc8 (git)
Create a notification for this product.
    Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 4.19.311 , ≤ 4.19.* (semver)
Unaffected: 5.4.273 , ≤ 5.4.* (semver)
Unaffected: 5.10.214 , ≤ 5.10.* (semver)
Unaffected: 5.15.153 , ≤ 5.15.* (semver)
Unaffected: 6.1.83 , ≤ 6.1.* (semver)
Unaffected: 6.6.23 , ≤ 6.6.* (semver)
Unaffected: 6.7.11 , ≤ 6.7.* (semver)
Unaffected: 6.8.2 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T00:21:05.381Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/d0e214acc59145ce25113f617311aa79dda39cb3"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/21e5fa4688e1a4d3db6b72216231b24232f75c1d"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/15641007df0f0d35fa28742b25c2a7db9dcd6895"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/ca1f06e72dec41ae4f76e7b1a8a97265447b46ae"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/f06899582ccee09bd85d0696290e3eaca9aa042d"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/7070b274c7866a4c5036f8d54fcaf315c64ac33a"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/43f798b9036491fb014b55dd61c4c5c3193267d0"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/0971126c8164abe2004b8536b49690a0d6005b0a"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/7a4b21250bf79eef26543d35bd390448646c536b"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-26883",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:48:22.381696Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:33:25.228Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/stackmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d0e214acc59145ce25113f617311aa79dda39cb3",
              "status": "affected",
              "version": "063c722dd9d285d877e6fd499e753d6224f4c046",
              "versionType": "git"
            },
            {
              "lessThan": "21e5fa4688e1a4d3db6b72216231b24232f75c1d",
              "status": "affected",
              "version": "7e3a6b820535eb395784060ae26c5af579528fa0",
              "versionType": "git"
            },
            {
              "lessThan": "15641007df0f0d35fa28742b25c2a7db9dcd6895",
              "status": "affected",
              "version": "8032bf2af9ce26b3a362b9711d15f626ab946a74",
              "versionType": "git"
            },
            {
              "lessThan": "ca1f06e72dec41ae4f76e7b1a8a97265447b46ae",
              "status": "affected",
              "version": "6183f4d3a0a2ad230511987c6c362ca43ec0055f",
              "versionType": "git"
            },
            {
              "lessThan": "f06899582ccee09bd85d0696290e3eaca9aa042d",
              "status": "affected",
              "version": "6183f4d3a0a2ad230511987c6c362ca43ec0055f",
              "versionType": "git"
            },
            {
              "lessThan": "7070b274c7866a4c5036f8d54fcaf315c64ac33a",
              "status": "affected",
              "version": "6183f4d3a0a2ad230511987c6c362ca43ec0055f",
              "versionType": "git"
            },
            {
              "lessThan": "43f798b9036491fb014b55dd61c4c5c3193267d0",
              "status": "affected",
              "version": "6183f4d3a0a2ad230511987c6c362ca43ec0055f",
              "versionType": "git"
            },
            {
              "lessThan": "0971126c8164abe2004b8536b49690a0d6005b0a",
              "status": "affected",
              "version": "6183f4d3a0a2ad230511987c6c362ca43ec0055f",
              "versionType": "git"
            },
            {
              "lessThan": "7a4b21250bf79eef26543d35bd390448646c536b",
              "status": "affected",
              "version": "6183f4d3a0a2ad230511987c6c362ca43ec0055f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "253150830a012adfccf90afcebae8fda5b05a80f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "766107351731ae223ebf60ca22bdfeb47ce6acc8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/stackmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.11"
            },
            {
              "lessThan": "5.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.311",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.273",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.214",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.153",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.23",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.311",
                  "versionStartIncluding": "4.19.177",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.273",
                  "versionStartIncluding": "5.4.99",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.214",
                  "versionStartIncluding": "5.10.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.153",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.83",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.23",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7.11",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8.2",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.9",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.9.258",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.14.222",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix stackmap overflow check on 32-bit arches\n\nThe stackmap code relies on roundup_pow_of_two() to compute the number\nof hash buckets, and contains an overflow check by checking if the\nresulting value is 0. However, on 32-bit arches, the roundup code itself\ncan overflow by doing a 32-bit left-shift of an unsigned long value,\nwhich is undefined behaviour, so it is not guaranteed to truncate\nneatly. This was triggered by syzbot on the DEVMAP_HASH type, which\ncontains the same check, copied from the hashtab code.\n\nThe commit in the fixes tag actually attempted to fix this, but the fix\ndid not account for the UB, so the fix only works on CPUs where an\noverflow does result in a neat truncation to zero, which is not\nguaranteed. Checking the value before rounding does not have this\nproblem."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T12:55:01.991Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d0e214acc59145ce25113f617311aa79dda39cb3"
        },
        {
          "url": "https://git.kernel.org/stable/c/21e5fa4688e1a4d3db6b72216231b24232f75c1d"
        },
        {
          "url": "https://git.kernel.org/stable/c/15641007df0f0d35fa28742b25c2a7db9dcd6895"
        },
        {
          "url": "https://git.kernel.org/stable/c/ca1f06e72dec41ae4f76e7b1a8a97265447b46ae"
        },
        {
          "url": "https://git.kernel.org/stable/c/f06899582ccee09bd85d0696290e3eaca9aa042d"
        },
        {
          "url": "https://git.kernel.org/stable/c/7070b274c7866a4c5036f8d54fcaf315c64ac33a"
        },
        {
          "url": "https://git.kernel.org/stable/c/43f798b9036491fb014b55dd61c4c5c3193267d0"
        },
        {
          "url": "https://git.kernel.org/stable/c/0971126c8164abe2004b8536b49690a0d6005b0a"
        },
        {
          "url": "https://git.kernel.org/stable/c/7a4b21250bf79eef26543d35bd390448646c536b"
        }
      ],
      "title": "bpf: Fix stackmap overflow check on 32-bit arches",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26883",
    "datePublished": "2024-04-17T10:27:39.036Z",
    "dateReserved": "2024-02-19T14:20:24.185Z",
    "dateUpdated": "2025-05-04T12:55:01.991Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/d0e214acc59145ce25113f617311aa79dda39cb3\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/21e5fa4688e1a4d3db6b72216231b24232f75c1d\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/15641007df0f0d35fa28742b25c2a7db9dcd6895\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ca1f06e72dec41ae4f76e7b1a8a97265447b46ae\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/f06899582ccee09bd85d0696290e3eaca9aa042d\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/7070b274c7866a4c5036f8d54fcaf315c64ac33a\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/43f798b9036491fb014b55dd61c4c5c3193267d0\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/0971126c8164abe2004b8536b49690a0d6005b0a\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/7a4b21250bf79eef26543d35bd390448646c536b\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T00:21:05.381Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-26883\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:48:22.381696Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:16.599Z\"}}], \"cna\": {\"title\": \"bpf: Fix stackmap overflow check on 32-bit arches\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"063c722dd9d2\", \"lessThan\": \"d0e214acc591\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7e3a6b820535\", \"lessThan\": \"21e5fa4688e1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8032bf2af9ce\", \"lessThan\": \"15641007df0f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6183f4d3a0a2\", \"lessThan\": \"ca1f06e72dec\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6183f4d3a0a2\", \"lessThan\": \"f06899582cce\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6183f4d3a0a2\", \"lessThan\": \"7070b274c786\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6183f4d3a0a2\", \"lessThan\": \"43f798b90364\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6183f4d3a0a2\", \"lessThan\": \"0971126c8164\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6183f4d3a0a2\", \"lessThan\": \"7a4b21250bf7\", \"versionType\": \"git\"}], \"programFiles\": [\"kernel/bpf/stackmap.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.11\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.11\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.311\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.273\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.214\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.153\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.83\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.23\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7.11\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.7.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"kernel/bpf/stackmap.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/d0e214acc59145ce25113f617311aa79dda39cb3\"}, {\"url\": \"https://git.kernel.org/stable/c/21e5fa4688e1a4d3db6b72216231b24232f75c1d\"}, {\"url\": \"https://git.kernel.org/stable/c/15641007df0f0d35fa28742b25c2a7db9dcd6895\"}, {\"url\": \"https://git.kernel.org/stable/c/ca1f06e72dec41ae4f76e7b1a8a97265447b46ae\"}, {\"url\": \"https://git.kernel.org/stable/c/f06899582ccee09bd85d0696290e3eaca9aa042d\"}, {\"url\": \"https://git.kernel.org/stable/c/7070b274c7866a4c5036f8d54fcaf315c64ac33a\"}, {\"url\": \"https://git.kernel.org/stable/c/43f798b9036491fb014b55dd61c4c5c3193267d0\"}, {\"url\": \"https://git.kernel.org/stable/c/0971126c8164abe2004b8536b49690a0d6005b0a\"}, {\"url\": \"https://git.kernel.org/stable/c/7a4b21250bf79eef26543d35bd390448646c536b\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf: Fix stackmap overflow check on 32-bit arches\\n\\nThe stackmap code relies on roundup_pow_of_two() to compute the number\\nof hash buckets, and contains an overflow check by checking if the\\nresulting value is 0. However, on 32-bit arches, the roundup code itself\\ncan overflow by doing a 32-bit left-shift of an unsigned long value,\\nwhich is undefined behaviour, so it is not guaranteed to truncate\\nneatly. This was triggered by syzbot on the DEVMAP_HASH type, which\\ncontains the same check, copied from the hashtab code.\\n\\nThe commit in the fixes tag actually attempted to fix this, but the fix\\ndid not account for the UB, so the fix only works on CPUs where an\\noverflow does result in a neat truncation to zero, which is not\\nguaranteed. Checking the value before rounding does not have this\\nproblem.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-05T09:17:33.738Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26883\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-05T09:17:33.738Z\", \"dateReserved\": \"2024-02-19T14:20:24.185Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-17T10:27:39.036Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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.