Vulnerability-Lookup

GHSA-4PJ6-GGMX-CCVM

Vulnerability from github – Published: 2026-08-28 09:31 – Updated: 2026-08-29 09:30

Details

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

f2fs: fix listxattr handling of corrupted xattr entries

Validate the xattr entry before reading its fields in f2fs_listxattr(). Return -EFSCORRUPTED when the entry is outside the valid xattr storage area instead of returning a successful partial result.

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80591"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T08:16:42Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix listxattr handling of corrupted xattr entries\n\nValidate the xattr entry before reading its fields in f2fs_listxattr().\nReturn -EFSCORRUPTED when the entry is outside the valid xattr storage\narea instead of returning a successful partial result.",
  "id": "GHSA-4pj6-ggmx-ccvm",
  "modified": "2026-08-29T09:30:25Z",
  "published": "2026-08-28T09:31:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80591"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2770041f34b52334ea63351ffb1cc2007a9de46e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c0dbfecd859fd02fe9008f33a83146102ccd9ba"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ef5bc304f23c3fe255d4936472378dcb74d0e94"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7dd01f7d0291583e3e5420c95c7d584e114899bd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7dfac47e4189692f35230f3064acf2540e6d75fe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c8a10f174316e80d577e6549099b71a7a2111f3f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dfa4891c27bccbd83d511a065721e85621f275a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec9f79c8d5b28a928e65b67cd138c841571cf502"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-80591 (GCVE-0-2026-80591)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:48 – Updated: 2026-08-29 06:21

Title

f2fs: fix listxattr handling of corrupted xattr entries

Summary

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix listxattr handling of corrupted xattr entries Validate the xattr entry before reading its fields in f2fs_listxattr(). Return -EFSCORRUPTED when the entry is outside the valid xattr storage area instead of returning a successful partial result.

Severity

7.8 (High)


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

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/7dfac47e4189692f3…
https://git.kernel.org/stable/c/c8a10f174316e80d5…
https://git.kernel.org/stable/c/dfa4891c27bccbd83…
https://git.kernel.org/stable/c/2770041f34b52334e…
https://git.kernel.org/stable/c/7dd01f7d0291583e3…
https://git.kernel.org/stable/c/ec9f79c8d5b28a928…
https://git.kernel.org/stable/c/3c0dbfecd859fd02f…
https://git.kernel.org/stable/c/5ef5bc304f23c3fe2…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 688078e7f36c293dae25b338ddc9e0a2790f6e06 , < 7dfac47e4189692f35230f3064acf2540e6d75fe (git) Affected: 688078e7f36c293dae25b338ddc9e0a2790f6e06 , < c8a10f174316e80d577e6549099b71a7a2111f3f (git) Affected: 688078e7f36c293dae25b338ddc9e0a2790f6e06 , < dfa4891c27bccbd83d511a065721e85621f275a1 (git) Affected: 688078e7f36c293dae25b338ddc9e0a2790f6e06 , < 2770041f34b52334ea63351ffb1cc2007a9de46e (git) Affected: 688078e7f36c293dae25b338ddc9e0a2790f6e06 , < 7dd01f7d0291583e3e5420c95c7d584e114899bd (git) Affected: 688078e7f36c293dae25b338ddc9e0a2790f6e06 , < ec9f79c8d5b28a928e65b67cd138c841571cf502 (git) Affected: 688078e7f36c293dae25b338ddc9e0a2790f6e06 , < 3c0dbfecd859fd02fe9008f33a83146102ccd9ba (git) Affected: 688078e7f36c293dae25b338ddc9e0a2790f6e06 , < 5ef5bc304f23c3fe255d4936472378dcb74d0e94 (git) Affected: ae811cecbbb231f11a84acaf74baca1283b964c7 (git) Affected: ed523cbd4a6594edf123dc03ec9d70ea4f793671 (git) Affected: 5811f24abd27a8a0791c6909c6ff803659060c84 (git) Affected: 4.14.181 , < 4.15 (semver) Affected: 4.19.119 , < 4.20 (semver) Affected: 5.4.36 , < 5.5 (semver)
Linux	Linux	Affected: 5.5 Unaffected: 0 , < 5.5 (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: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 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/f2fs/xattr.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
              "version": "688078e7f36c293dae25b338ddc9e0a2790f6e06",
              "versionType": "git"
            },
            {
              "lessThan": "c8a10f174316e80d577e6549099b71a7a2111f3f",
              "status": "affected",
              "version": "688078e7f36c293dae25b338ddc9e0a2790f6e06",
              "versionType": "git"
            },
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              "status": "affected",
              "version": "688078e7f36c293dae25b338ddc9e0a2790f6e06",
              "versionType": "git"
            },
            {
              "lessThan": "2770041f34b52334ea63351ffb1cc2007a9de46e",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "7dd01f7d0291583e3e5420c95c7d584e114899bd",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "ec9f79c8d5b28a928e65b67cd138c841571cf502",
              "status": "affected",
              "version": "688078e7f36c293dae25b338ddc9e0a2790f6e06",
              "versionType": "git"
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              "versionType": "git"
            },
            {
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              "version": "ae811cecbbb231f11a84acaf74baca1283b964c7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ed523cbd4a6594edf123dc03ec9d70ea4f793671",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5811f24abd27a8a0791c6909c6ff803659060c84",
              "versionType": "git"
            },
            {
              "lessThan": "4.15",
              "status": "affected",
              "version": "4.14.181",
              "versionType": "semver"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.119",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.36",
              "versionType": "semver"
            }
          ]
        },
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          "defaultStatus": "affected",
          "product": "Linux",
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            "fs/f2fs/xattr.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.5"
            },
            {
              "lessThan": "5.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "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": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.96",
                  "versionStartIncluding": "5.5",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.5",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
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                  "versionStartIncluding": "5.5",
                  "vulnerable": true
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                {
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                  "versionStartIncluding": "4.14.181",
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                },
                {
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                  "vulnerable": true
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                {
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              "negate": false,
              "operator": "OR"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix listxattr handling of corrupted xattr entries\n\nValidate the xattr entry before reading its fields in f2fs_listxattr().\nReturn -EFSCORRUPTED when the entry is outside the valid xattr storage\narea instead of returning a successful partial result."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The flaw is reached via local listxattr/flistxattr/listxattrat syscalls through vfs_listxattr into f2fs_listxattr; f2fs is a local block filesystem (Android userdata, embedded flash) and although nfsd/ksmbd can call vfs_listxattr this is a secondary path requiring pre-existing on-disk corruption.\nAC:L - Once a crafted f2fs image with corrupted xattr entry sizes is mounted, the attacker deterministically controls the on-disk layout that makes list_for_each_xattr iterate past last_base_addr; no race, special memory layout, or rare kernel config is required beyond standard CONFIG_F2FS_FS_XATTR.\nPR:L - Planting malformed on-disk xattr metadata requires offline image crafting plus CAP_SYS_ADMIN to loop-mount (obtainable in an unprivileged user namespace) or root for raw block writes; triggering listxattr only needs normal file access on the attacker-controlled mount with no capability checks beyond LSM hooks on the syscall path.\nUI:N - In the highest-impact self-contained attack the attacker crafts a malicious f2fs image and mounts it inside their own user namespace, then calls listxattr on their own inode with no victim action such as opening a file or inserting removable media required.\nS:U - The out-of-bounds read corrupts or leaks kernel heap memory within the same kernel security domain; this is a standard local kernel memory-safety flaw, not a VM escape, container breakout, or IOMMU boundary bypass.\nC:H - Before bounds validation f2fs_listxattr reads entry-\u003ee_name_index and XATTR_NEXT_ENTRY() fields from xattr entries outside the valid storage area, causing slab out-of-bounds reads of adjacent kernel heap objects that can disclose kernel pointers and sensitive kernel data.\nI:H - Although the immediate fault is a read past bounds rather than a write, this is kernel heap memory corruption class behavior; adjacent-slab reads are routinely chained into further kernel exploitation via heap grooming for arbitrary write and code execution, so I:H applies when uncertain.\nA:H - Reading xattr entry fields beyond the kmalloc-allocated buffer can fault the kernel with a slab out-of-bounds access or oops under KASAN/hardening; f2fs_handle_error may log corruption but does not prevent the out-of-bounds read from destabilizing the system on each listxattr invocation."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-29T06:21:06.412Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7dfac47e4189692f35230f3064acf2540e6d75fe"
        },
        {
          "url": "https://git.kernel.org/stable/c/c8a10f174316e80d577e6549099b71a7a2111f3f"
        },
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          "url": "https://git.kernel.org/stable/c/dfa4891c27bccbd83d511a065721e85621f275a1"
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        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/ec9f79c8d5b28a928e65b67cd138c841571cf502"
        },
        {
          "url": "https://git.kernel.org/stable/c/3c0dbfecd859fd02fe9008f33a83146102ccd9ba"
        },
        {
          "url": "https://git.kernel.org/stable/c/5ef5bc304f23c3fe255d4936472378dcb74d0e94"
        }
      ],
      "title": "f2fs: fix listxattr handling of corrupted xattr entries",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80591",
    "datePublished": "2026-08-28T06:48:19.617Z",
    "dateReserved": "2026-08-26T14:34:25.770Z",
    "dateUpdated": "2026-08-29T06:21:06.412Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-4PJ6-GGMX-CCVM

CVE-2026-80591 (GCVE-0-2026-80591)

Tags

Sightings

Nomenclature