Vulnerability-Lookup

GHSA-2WJR-8GX8-Q69W

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33

Details

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

afs: Fix error code in afs_extract_vl_addrs()

The error codes on these paths are only set on the first iteration through the loop. Set the correct error code on every iteration.

Severity

7.5 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72378"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:11Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Fix error code in afs_extract_vl_addrs()\n\nThe error codes on these paths are only set on the first iteration\nthrough the loop.  Set the correct error code on every iteration.",
  "id": "GHSA-2wjr-8gx8-q69w",
  "modified": "2026-08-17T06:33:26Z",
  "published": "2026-08-15T06:32:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72378"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4897cb71d4ab1f7e1a214adb1e4b80176702368d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4e0b047848a855f2c933a6439f76a01743ba5620"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ce6737a975ea3e0dc2e5946628d233779ca0caf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8530206911fd66ad739ca5ce95f1d069f3d42204"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ad9016e3333c3c1f9284a253ff0658369e07aac"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bdcd80ff12939d172043fac5eb822b92366a1bab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cb33dd2968588c78fad78dec19f61cabe5785494"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f70fbf2b974b63a7042705c2b0464cb8c97e9f34"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-72378 (GCVE-0-2026-72378)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:56 – Updated: 2026-08-17 05:43

Title

afs: Fix error code in afs_extract_vl_addrs()

Summary

In the Linux kernel, the following vulnerability has been resolved: afs: Fix error code in afs_extract_vl_addrs() The error codes on these paths are only set on the first iteration through the loop. Set the correct error code on every iteration.

Severity

7.5 (High)


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

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6992 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/7ce6737a975ea3e0d…
https://git.kernel.org/stable/c/4e0b047848a855f2c…
https://git.kernel.org/stable/c/f70fbf2b974b63a70…
https://git.kernel.org/stable/c/9ad9016e3333c3c1f…
https://git.kernel.org/stable/c/cb33dd2968588c78f…
https://git.kernel.org/stable/c/8530206911fd66ad7…
https://git.kernel.org/stable/c/bdcd80ff12939d172…
https://git.kernel.org/stable/c/4897cb71d4ab1f7e1…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 , < 7ce6737a975ea3e0dc2e5946628d233779ca0caf (git) Affected: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 , < 4e0b047848a855f2c933a6439f76a01743ba5620 (git) Affected: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 , < f70fbf2b974b63a7042705c2b0464cb8c97e9f34 (git) Affected: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 , < 9ad9016e3333c3c1f9284a253ff0658369e07aac (git) Affected: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 , < cb33dd2968588c78fad78dec19f61cabe5785494 (git) Affected: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 , < 8530206911fd66ad739ca5ce95f1d069f3d42204 (git) Affected: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 , < bdcd80ff12939d172043fac5eb822b92366a1bab (git) Affected: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 , < 4897cb71d4ab1f7e1a214adb1e4b80176702368d (git)
Linux	Linux	Affected: 4.20 Unaffected: 0 , < 4.20 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/afs/vl_list.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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            {
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              "version": "0a5143f2f89cc88d8a3eada8e8ccd86c1e988257",
              "versionType": "git"
            },
            {
              "lessThan": "f70fbf2b974b63a7042705c2b0464cb8c97e9f34",
              "status": "affected",
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              "versionType": "git"
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            {
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              "status": "affected",
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              "versionType": "git"
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              "version": "4.20"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
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              "versionType": "semver"
            },
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              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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                },
                {
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                  "versionStartIncluding": "4.20",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Fix error code in afs_extract_vl_addrs()\n\nThe error codes on these paths are only set on the first iteration\nthrough the loop.  Set the correct error code on every iteration."
        }
      ],
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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              "value": "AV:N - Malformed data reaches afs_extract_vl_addrs() from DNS AFSDB server-list replies fetched over the network via dns_query()/request_key upcall during afs_dns_query() cell VL lookups and periodic TTL refresh.\nAC:L - An attacker who can supply the DNS server-list payload can reliably trigger the bug by encoding two or more addresses with a valid first entry and a truncated second IPv4/IPv6 record, forcing the stale ret=0 error path on iteration two or later.\nPR:N - No local account or kernel capabilities are required on the victim; a network-positioned attacker can deliver the malicious binary DNS server-list response whenever the kAFS client resolves an AFSDB record for a targeted cell name.\nUI:N - Exploitation does not require victim interaction at trigger time because kAFS automatically re-queries DNS on cell setup and TTL expiry through afs_update_cell(), so a poisoned response can crash the kernel without further user action.\nS:U - The flaw is a kernel NULL-pointer dereference in AFS DNS parsing that crashes the local host; it does not cross a VM, container, or IOMMU security boundary to affect a different authority.\nC:N - The failure mode is returning ERR_PTR(0) after freeing the address list, causing a NULL dereference in the caller; there is no out-of-bounds read, use-after-free reuse, or other memory disclosure primitive.\nI:N - Impact is limited to a kernel oops from writing addrs-\u003esource on a NULL pointer after a parse error is mishandled; no attacker-controlled memory corruption or arbitrary write primitive is established.\nA:H - The NULL pointer dereference in afs_extract_vlserver_list() runs in the kAFS cell manager workqueue during DNS parsing and causes a kernel oops or panic, fully denying system availability."
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          "url": "https://git.kernel.org/stable/c/4897cb71d4ab1f7e1a214adb1e4b80176702368d"
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    "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.

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