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CVE-2023-53420 (GCVE-0-2023-53420)

Vulnerability from cvelistv5 – Published: 2025-09-18 16:04 – Updated: 2026-08-05 09:14
VLAI
Title
ntfs: Fix panic about slab-out-of-bounds caused by ntfs_listxattr()
Summary
In the Linux kernel, the following vulnerability has been resolved: ntfs: Fix panic about slab-out-of-bounds caused by ntfs_listxattr() Here is a BUG report from syzbot: BUG: KASAN: slab-out-of-bounds in ntfs_list_ea fs/ntfs3/xattr.c:191 [inline] BUG: KASAN: slab-out-of-bounds in ntfs_listxattr+0x401/0x570 fs/ntfs3/xattr.c:710 Read of size 1 at addr ffff888021acaf3d by task syz-executor128/3632 Call Trace: ntfs_list_ea fs/ntfs3/xattr.c:191 [inline] ntfs_listxattr+0x401/0x570 fs/ntfs3/xattr.c:710 vfs_listxattr fs/xattr.c:457 [inline] listxattr+0x293/0x2d0 fs/xattr.c:804 Fix the logic of ea_all iteration. When the ea->name_len is 0, return immediately, or Add2Ptr() would visit invalid memory in the next loop. [almaz.alexandrovich@paragon-software.com: lines of the patch have changed]
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 19:11 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: be71b5cba2e6485e8959da7a9f9a44461a1bb074 , < f3380d895e28a32632eb3609f5bd515adee4e5a1 (git)
Affected: be71b5cba2e6485e8959da7a9f9a44461a1bb074 , < c86a2517df6c9304db8fb12b77136ec7a5d85994 (git)
Affected: be71b5cba2e6485e8959da7a9f9a44461a1bb074 , < 721b75ea2dfce53a8890dff92ae01afca8e74f88 (git)
Affected: be71b5cba2e6485e8959da7a9f9a44461a1bb074 , < 3c675ddffb17a8b1e32efad5c983254af18b12c2 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.121 , ≤ 5.15.* (semver)
Unaffected: 6.1.39 , ≤ 6.1.* (semver)
Unaffected: 6.4.4 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.1, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-53420\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T19:11:54.225188Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-125\", \"description\": \"CWE-125 Out-of-bounds Read\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T19:11:50.035Z\"}}], \"cna\": {\"title\": \"ntfs: Fix panic about slab-out-of-bounds caused by ntfs_listxattr()\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.1, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - The bug is in ntfs3 on-disk EA parsing reached via the listxattr syscall (ntfs_listxattr \\u2192 ntfs_list_ea) on a mounted NTFS volume; malicious ATTR_EA data comes from the filesystem image, not from network protocol input.\\nAC:L - A crafted NTFS image with a zero name_len EA reliably triggers the out-of-bounds read on listxattr with no race or other conditions outside the attacker\\u2019s control.\\nPR:L - vfs_listxattr does not require MAY_READ\\u2014only path traversal and LSM listxattr hooks\\u2014so an unprivileged local user who can reach a file on a mounted NTFS volume can invoke the vulnerable path.\\nUI:N - Once an NTFS volume is mounted (common for removable/dual-boot/shared storage), the attacker triggers the bug solely by calling listxattr; no further victim interaction is required.\\nS:U - Impact is confined to the local kernel\\u2019s memory/availability authority; this is standard kernel memory-safety impact with no VM, IOMMU, or other security-authority boundary crossed.\\nC:H - The slab OOB read in ntfs_list_ea can read past the kmalloc\\u2019d EA buffer and, on continued iteration, memcpy attacker-influenced lengths of adjacent slab memory into the listxattr buffer that is copied to userspace.\\nI:N - The defect is an out-of-bounds read only; memcpy destinations are the legitimate list buffer under a size check, with no OOB write or other kernel integrity corruption primitive.\\nA:H - The OOB access causes KASAN reports and can oops/panic the kernel when invalid EA iteration touches unmapped or poisoned slab memory, enabling denial of service.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"be71b5cba2e6485e8959da7a9f9a44461a1bb074\", \"lessThan\": \"f3380d895e28a32632eb3609f5bd515adee4e5a1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"be71b5cba2e6485e8959da7a9f9a44461a1bb074\", \"lessThan\": \"c86a2517df6c9304db8fb12b77136ec7a5d85994\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"be71b5cba2e6485e8959da7a9f9a44461a1bb074\", \"lessThan\": \"721b75ea2dfce53a8890dff92ae01afca8e74f88\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"be71b5cba2e6485e8959da7a9f9a44461a1bb074\", \"lessThan\": \"3c675ddffb17a8b1e32efad5c983254af18b12c2\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/ntfs3/xattr.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.15\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.15\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.121\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.39\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.4.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.4.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/ntfs3/xattr.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f3380d895e28a32632eb3609f5bd515adee4e5a1\"}, {\"url\": \"https://git.kernel.org/stable/c/c86a2517df6c9304db8fb12b77136ec7a5d85994\"}, {\"url\": \"https://git.kernel.org/stable/c/721b75ea2dfce53a8890dff92ae01afca8e74f88\"}, {\"url\": \"https://git.kernel.org/stable/c/3c675ddffb17a8b1e32efad5c983254af18b12c2\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nntfs: Fix panic about slab-out-of-bounds caused by ntfs_listxattr()\\n\\nHere is a BUG report from syzbot:\\n\\nBUG: KASAN: slab-out-of-bounds in ntfs_list_ea fs/ntfs3/xattr.c:191 [inline]\\nBUG: KASAN: slab-out-of-bounds in ntfs_listxattr+0x401/0x570 fs/ntfs3/xattr.c:710\\nRead of size 1 at addr ffff888021acaf3d by task syz-executor128/3632\\n\\nCall Trace:\\n ntfs_list_ea fs/ntfs3/xattr.c:191 [inline]\\n ntfs_listxattr+0x401/0x570 fs/ntfs3/xattr.c:710\\n vfs_listxattr fs/xattr.c:457 [inline]\\n listxattr+0x293/0x2d0 fs/xattr.c:804\\n\\nFix the logic of ea_all iteration. When the ea-\u003ename_len is 0,\\nreturn immediately, or Add2Ptr() would visit invalid memory\\nin the next loop.\\n\\n[almaz.alexandrovich@paragon-software.com: lines of the patch have changed]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.121\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.39\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4.4\", \"versionStartIncluding\": \"5.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5\", \"versionStartIncluding\": \"5.15\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T09:14:02.648Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-53420\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T09:14:02.648Z\", \"dateReserved\": \"2025-09-17T14:54:09.741Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-18T16:04:03.754Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.