CVE-2023-52991 (GCVE-0-2023-52991)

Vulnerability from cvelistv5 – Published: 2025-03-27 16:43 – Updated: 2025-10-01 20:17
VLAI?
Title
net: fix NULL pointer in skb_segment_list
Summary
In the Linux kernel, the following vulnerability has been resolved: net: fix NULL pointer in skb_segment_list Commit 3a1296a38d0c ("net: Support GRO/GSO fraglist chaining.") introduced UDP listifyed GRO. The segmentation relies on frag_list being untouched when passing through the network stack. This assumption can be broken sometimes, where frag_list itself gets pulled into linear area, leaving frag_list being NULL. When this happens it can trigger following NULL pointer dereference, and panic the kernel. Reverse the test condition should fix it. [19185.577801][ C1] BUG: kernel NULL pointer dereference, address: ... [19185.663775][ C1] RIP: 0010:skb_segment_list+0x1cc/0x390 ... [19185.834644][ C1] Call Trace: [19185.841730][ C1] <TASK> [19185.848563][ C1] __udp_gso_segment+0x33e/0x510 [19185.857370][ C1] inet_gso_segment+0x15b/0x3e0 [19185.866059][ C1] skb_mac_gso_segment+0x97/0x110 [19185.874939][ C1] __skb_gso_segment+0xb2/0x160 [19185.883646][ C1] udp_queue_rcv_skb+0xc3/0x1d0 [19185.892319][ C1] udp_unicast_rcv_skb+0x75/0x90 [19185.900979][ C1] ip_protocol_deliver_rcu+0xd2/0x200 [19185.910003][ C1] ip_local_deliver_finish+0x44/0x60 [19185.918757][ C1] __netif_receive_skb_one_core+0x8b/0xa0 [19185.927834][ C1] process_backlog+0x88/0x130 [19185.935840][ C1] __napi_poll+0x27/0x150 [19185.943447][ C1] net_rx_action+0x27e/0x5f0 [19185.951331][ C1] ? mlx5_cq_tasklet_cb+0x70/0x160 [mlx5_core] [19185.960848][ C1] __do_softirq+0xbc/0x25d [19185.968607][ C1] irq_exit_rcu+0x83/0xb0 [19185.976247][ C1] common_interrupt+0x43/0xa0 [19185.984235][ C1] asm_common_interrupt+0x22/0x40 ... [19186.094106][ C1] </TASK>
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 3a1296a38d0cf62bffb9a03c585cbd5dbf15d596 , < 6446369fb9f083ce032448c5047da08e298b22e6 (git)
Affected: 3a1296a38d0cf62bffb9a03c585cbd5dbf15d596 , < 046de74f9af92ae9ffce75fa22a1795223f4fb54 (git)
Affected: 3a1296a38d0cf62bffb9a03c585cbd5dbf15d596 , < 888dad6f3e85e3b2f8389bd6478f181efc72534d (git)
Affected: 3a1296a38d0cf62bffb9a03c585cbd5dbf15d596 , < 876e8ca8366735a604bac86ff7e2732fc9d85d2d (git)
Create a notification for this product.
    Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.10.167 , ≤ 5.10.* (semver)
Unaffected: 5.15.92 , ≤ 5.15.* (semver)
Unaffected: 6.1.10 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (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-2023-52991",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T20:08:20.181820Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T20:17:04.316Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/skbuff.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6446369fb9f083ce032448c5047da08e298b22e6",
              "status": "affected",
              "version": "3a1296a38d0cf62bffb9a03c585cbd5dbf15d596",
              "versionType": "git"
            },
            {
              "lessThan": "046de74f9af92ae9ffce75fa22a1795223f4fb54",
              "status": "affected",
              "version": "3a1296a38d0cf62bffb9a03c585cbd5dbf15d596",
              "versionType": "git"
            },
            {
              "lessThan": "888dad6f3e85e3b2f8389bd6478f181efc72534d",
              "status": "affected",
              "version": "3a1296a38d0cf62bffb9a03c585cbd5dbf15d596",
              "versionType": "git"
            },
            {
              "lessThan": "876e8ca8366735a604bac86ff7e2732fc9d85d2d",
              "status": "affected",
              "version": "3a1296a38d0cf62bffb9a03c585cbd5dbf15d596",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/core/skbuff.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.167",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.92",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.167",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.92",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.10",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix NULL pointer in skb_segment_list\n\nCommit 3a1296a38d0c (\"net: Support GRO/GSO fraglist chaining.\")\nintroduced UDP listifyed GRO. The segmentation relies on frag_list being\nuntouched when passing through the network stack. This assumption can be\nbroken sometimes, where frag_list itself gets pulled into linear area,\nleaving frag_list being NULL. When this happens it can trigger\nfollowing NULL pointer dereference, and panic the kernel. Reverse the\ntest condition should fix it.\n\n[19185.577801][    C1] BUG: kernel NULL pointer dereference, address:\n...\n[19185.663775][    C1] RIP: 0010:skb_segment_list+0x1cc/0x390\n...\n[19185.834644][    C1] Call Trace:\n[19185.841730][    C1]  \u003cTASK\u003e\n[19185.848563][    C1]  __udp_gso_segment+0x33e/0x510\n[19185.857370][    C1]  inet_gso_segment+0x15b/0x3e0\n[19185.866059][    C1]  skb_mac_gso_segment+0x97/0x110\n[19185.874939][    C1]  __skb_gso_segment+0xb2/0x160\n[19185.883646][    C1]  udp_queue_rcv_skb+0xc3/0x1d0\n[19185.892319][    C1]  udp_unicast_rcv_skb+0x75/0x90\n[19185.900979][    C1]  ip_protocol_deliver_rcu+0xd2/0x200\n[19185.910003][    C1]  ip_local_deliver_finish+0x44/0x60\n[19185.918757][    C1]  __netif_receive_skb_one_core+0x8b/0xa0\n[19185.927834][    C1]  process_backlog+0x88/0x130\n[19185.935840][    C1]  __napi_poll+0x27/0x150\n[19185.943447][    C1]  net_rx_action+0x27e/0x5f0\n[19185.951331][    C1]  ? mlx5_cq_tasklet_cb+0x70/0x160 [mlx5_core]\n[19185.960848][    C1]  __do_softirq+0xbc/0x25d\n[19185.968607][    C1]  irq_exit_rcu+0x83/0xb0\n[19185.976247][    C1]  common_interrupt+0x43/0xa0\n[19185.984235][    C1]  asm_common_interrupt+0x22/0x40\n...\n[19186.094106][    C1]  \u003c/TASK\u003e"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:47:02.849Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6446369fb9f083ce032448c5047da08e298b22e6"
        },
        {
          "url": "https://git.kernel.org/stable/c/046de74f9af92ae9ffce75fa22a1795223f4fb54"
        },
        {
          "url": "https://git.kernel.org/stable/c/888dad6f3e85e3b2f8389bd6478f181efc72534d"
        },
        {
          "url": "https://git.kernel.org/stable/c/876e8ca8366735a604bac86ff7e2732fc9d85d2d"
        }
      ],
      "title": "net: fix NULL pointer in skb_segment_list",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-52991",
    "datePublished": "2025-03-27T16:43:26.991Z",
    "dateReserved": "2025-03-27T16:40:15.741Z",
    "dateUpdated": "2025-10-01T20:17:04.316Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "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-2023-52991\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T20:08:20.181820Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476 NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-01T14:36:28.608Z\"}}], \"cna\": {\"title\": \"net: fix NULL pointer in skb_segment_list\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3a1296a38d0cf62bffb9a03c585cbd5dbf15d596\", \"lessThan\": \"6446369fb9f083ce032448c5047da08e298b22e6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3a1296a38d0cf62bffb9a03c585cbd5dbf15d596\", \"lessThan\": \"046de74f9af92ae9ffce75fa22a1795223f4fb54\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3a1296a38d0cf62bffb9a03c585cbd5dbf15d596\", \"lessThan\": \"888dad6f3e85e3b2f8389bd6478f181efc72534d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3a1296a38d0cf62bffb9a03c585cbd5dbf15d596\", \"lessThan\": \"876e8ca8366735a604bac86ff7e2732fc9d85d2d\", \"versionType\": \"git\"}], \"programFiles\": [\"net/core/skbuff.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.167\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.92\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.2\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/core/skbuff.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/6446369fb9f083ce032448c5047da08e298b22e6\"}, {\"url\": \"https://git.kernel.org/stable/c/046de74f9af92ae9ffce75fa22a1795223f4fb54\"}, {\"url\": \"https://git.kernel.org/stable/c/888dad6f3e85e3b2f8389bd6478f181efc72534d\"}, {\"url\": \"https://git.kernel.org/stable/c/876e8ca8366735a604bac86ff7e2732fc9d85d2d\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: fix NULL pointer in skb_segment_list\\n\\nCommit 3a1296a38d0c (\\\"net: Support GRO/GSO fraglist chaining.\\\")\\nintroduced UDP listifyed GRO. The segmentation relies on frag_list being\\nuntouched when passing through the network stack. This assumption can be\\nbroken sometimes, where frag_list itself gets pulled into linear area,\\nleaving frag_list being NULL. When this happens it can trigger\\nfollowing NULL pointer dereference, and panic the kernel. Reverse the\\ntest condition should fix it.\\n\\n[19185.577801][    C1] BUG: kernel NULL pointer dereference, address:\\n...\\n[19185.663775][    C1] RIP: 0010:skb_segment_list+0x1cc/0x390\\n...\\n[19185.834644][    C1] Call Trace:\\n[19185.841730][    C1]  \u003cTASK\u003e\\n[19185.848563][    C1]  __udp_gso_segment+0x33e/0x510\\n[19185.857370][    C1]  inet_gso_segment+0x15b/0x3e0\\n[19185.866059][    C1]  skb_mac_gso_segment+0x97/0x110\\n[19185.874939][    C1]  __skb_gso_segment+0xb2/0x160\\n[19185.883646][    C1]  udp_queue_rcv_skb+0xc3/0x1d0\\n[19185.892319][    C1]  udp_unicast_rcv_skb+0x75/0x90\\n[19185.900979][    C1]  ip_protocol_deliver_rcu+0xd2/0x200\\n[19185.910003][    C1]  ip_local_deliver_finish+0x44/0x60\\n[19185.918757][    C1]  __netif_receive_skb_one_core+0x8b/0xa0\\n[19185.927834][    C1]  process_backlog+0x88/0x130\\n[19185.935840][    C1]  __napi_poll+0x27/0x150\\n[19185.943447][    C1]  net_rx_action+0x27e/0x5f0\\n[19185.951331][    C1]  ? mlx5_cq_tasklet_cb+0x70/0x160 [mlx5_core]\\n[19185.960848][    C1]  __do_softirq+0xbc/0x25d\\n[19185.968607][    C1]  irq_exit_rcu+0x83/0xb0\\n[19185.976247][    C1]  common_interrupt+0x43/0xa0\\n[19185.984235][    C1]  asm_common_interrupt+0x22/0x40\\n...\\n[19186.094106][    C1]  \u003c/TASK\u003e\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.167\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.92\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.10\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.2\", \"versionStartIncluding\": \"5.6\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:47:02.849Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52991\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-01T20:17:04.316Z\", \"dateReserved\": \"2025-03-27T16:40:15.741Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-03-27T16:43:26.991Z\", \"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.