Vulnerability-Lookup

GHSA-QC73-3QQX-FC2Q

Vulnerability from github – Published: 2026-05-08 15:31 – Updated: 2026-05-20 21:31

Details

In the Linux kernel, the following vulnerability has been resolved:

rxrpc, afs: Fix missing error pointer check after rxrpc_kernel_lookup_peer()

rxrpc_kernel_lookup_peer() can also return error pointers in addition to NULL, so just checking for NULL is not sufficient.

Fix this by:

(1) Changing rxrpc_kernel_lookup_peer() to return -ENOMEM rather than NULL on allocation failure.

(2) Making the callers in afs use IS_ERR() and PTR_ERR() to pass on the error code returned.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43463"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-08T15:16:59Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc, afs: Fix missing error pointer check after rxrpc_kernel_lookup_peer()\n\nrxrpc_kernel_lookup_peer() can also return error pointers in addition to\nNULL, so just checking for NULL is not sufficient.\n\nFix this by:\n\n (1) Changing rxrpc_kernel_lookup_peer() to return -ENOMEM rather than NULL\n     on allocation failure.\n\n (2) Making the callers in afs use IS_ERR() and PTR_ERR() to pass on the\n     error code returned.",
  "id": "GHSA-qc73-3qqx-fc2q",
  "modified": "2026-05-20T21:31:28Z",
  "published": "2026-05-08T15:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43463"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4245a79003adf30e67f8e9060915bd05cb31d142"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54331c5dcc6d97683d7ca2788e7ef9c9505e1477"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d55fa7cd4b19ba91b34b307d769c149e56ad0a75"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-43463 (GCVE-0-2026-43463)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:22 – Updated: 2026-05-23 16:07

Title

rxrpc, afs: Fix missing error pointer check after rxrpc_kernel_lookup_peer()

Summary

In the Linux kernel, the following vulnerability has been resolved: rxrpc, afs: Fix missing error pointer check after rxrpc_kernel_lookup_peer() rxrpc_kernel_lookup_peer() can also return error pointers in addition to NULL, so just checking for NULL is not sufficient. Fix this by: (1) Changing rxrpc_kernel_lookup_peer() to return -ENOMEM rather than NULL on allocation failure. (2) Making the callers in afs use IS_ERR() and PTR_ERR() to pass on the error code returned.

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/d55fa7cd4b19ba91b…
https://git.kernel.org/stable/c/54331c5dcc6d97683…
https://git.kernel.org/stable/c/4245a79003adf30e6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 72904d7b9bfbf2dd146254edea93958bc35bbbfe , < d55fa7cd4b19ba91b34b307d769c149e56ad0a75 (git) Affected: 72904d7b9bfbf2dd146254edea93958bc35bbbfe , < 54331c5dcc6d97683d7ca2788e7ef9c9505e1477 (git) Affected: 72904d7b9bfbf2dd146254edea93958bc35bbbfe , < 4245a79003adf30e67f8e9060915bd05cb31d142 (git) Affected: 056fc740be000d39a7dba700a935f3bbfbc664e6 (git) Affected: 6.7.3 , < 6.8 (semver)
Linux	Linux	Affected: 6.8 Unaffected: 0 , < 6.8 (semver) Unaffected: 6.18.19 , ≤ 6.18.* (semver) Unaffected: 6.19.9 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/afs/addr_list.c",
            "net/rxrpc/af_rxrpc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d55fa7cd4b19ba91b34b307d769c149e56ad0a75",
              "status": "affected",
              "version": "72904d7b9bfbf2dd146254edea93958bc35bbbfe",
              "versionType": "git"
            },
            {
              "lessThan": "54331c5dcc6d97683d7ca2788e7ef9c9505e1477",
              "status": "affected",
              "version": "72904d7b9bfbf2dd146254edea93958bc35bbbfe",
              "versionType": "git"
            },
            {
              "lessThan": "4245a79003adf30e67f8e9060915bd05cb31d142",
              "status": "affected",
              "version": "72904d7b9bfbf2dd146254edea93958bc35bbbfe",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "6.8",
              "status": "affected",
              "version": "6.7.3",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
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          "programFiles": [
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            "net/rxrpc/af_rxrpc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "lessThan": "6.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
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                  "vulnerable": true
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              "operator": "OR"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc, afs: Fix missing error pointer check after rxrpc_kernel_lookup_peer()\n\nrxrpc_kernel_lookup_peer() can also return error pointers in addition to\nNULL, so just checking for NULL is not sufficient.\n\nFix this by:\n\n (1) Changing rxrpc_kernel_lookup_peer() to return -ENOMEM rather than NULL\n     on allocation failure.\n\n (2) Making the callers in afs use IS_ERR() and PTR_ERR() to pass on the\n     error code returned."
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T16:07:03.690Z",
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        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/4245a79003adf30e67f8e9060915bd05cb31d142"
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      ],
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    "cveId": "CVE-2026-43463",
    "datePublished": "2026-05-08T14:22:25.346Z",
    "dateReserved": "2026-05-01T14:12:56.010Z",
    "dateUpdated": "2026-05-23T16:07:03.690Z",
    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date	Other

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.

Action not permitted

GHSA-QC73-3QQX-FC2Q

CVE-2026-43463 (GCVE-0-2026-43463)

Tags

Sightings

Nomenclature