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

Vulnerability from cvelistv5 – Published: 2026-08-28 06:48 – Updated: 2026-08-29 06:21
VLAI
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
References
Impacted products
Vendor Product Version CPE status
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)
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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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          "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."
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        {
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            "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"
          },
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              "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."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/c8a10f174316e80d577e6549099b71a7a2111f3f"
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        {
          "url": "https://git.kernel.org/stable/c/5ef5bc304f23c3fe255d4936472378dcb74d0e94"
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      "title": "f2fs: fix listxattr handling of corrupted xattr entries",
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    "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"
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      "date": "2026-09-01",
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result.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/f2fs/xattr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"688078e7f36c293dae25b338ddc9e0a2790f6e06\",\"lessThan\":\"7dfac47e4189692f35230f3064acf2540e6d75fe\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"688078e7f36c293dae25b338ddc9e0a2790f6e06\",\"lessThan\":\"c8a10f174316e80d577e6549099b71a7a2111f3f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"688078e7f36c293dae25b338ddc9e0a2790f6e06\",\"lessThan\":\"dfa4891c27bccbd83d511a065721e85621f275a1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"688078e7f36c293dae25b338ddc9e0a2790f6e06\",\"lessThan\":\"2770041f34b52334ea63351ffb1cc2007a9de46e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"688078e7f36c293dae25b338ddc9e0a2790f6e06\",\"lessThan\":\"7dd01f7d0291583e3e5420c95c7d584e114899bd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"688078e7f36c293dae25b338ddc9e0a2790f6e06\",\"lessThan\":\"ec9f79c8d5b28a928e65b67cd138c841571cf502\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"688078e7f36c293dae25b338ddc9e0a2790f6e06\",\"lessThan\":\"3c0dbfecd859fd02fe9008f33a83146102ccd9ba\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"688078e7f36c293dae25b338ddc9e0a2790f6e06\",\"lessThan\":\"5ef5bc304f23c3fe255d4936472378dcb74d0e94\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ae811cecbbb231f11a84acaf74baca1283b964c7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed523cbd4a6594edf123dc03ec9d70ea4f793671\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5811f24abd27a8a0791c6909c6ff803659060c84\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4.14.181\",\"lessThan\":\"4.15\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.119\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.36\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/f2fs/xattr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.5\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.96\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2770041f34b52334ea63351ffb1cc2007a9de46e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3c0dbfecd859fd02fe9008f33a83146102ccd9ba\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5ef5bc304f23c3fe255d4936472378dcb74d0e94\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7dd01f7d0291583e3e5420c95c7d584e114899bd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7dfac47e4189692f35230f3064acf2540e6d75fe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c8a10f174316e80d577e6549099b71a7a2111f3f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dfa4891c27bccbd83d511a065721e85621f275a1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081f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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-31T05:48:07+00:00",
      "cve": "CVE-2026-80591",
      "id": "CVE-2026-80591",
      "initial_release_date": "2026-08-28T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: f2fs: fix listxattr handling of corrupted xattr entries",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80591.json",
      "version": "3"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.