{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53285","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-09-16T08:09:37.991Z","datePublished":"2025-09-16T08:11:18.585Z","dateUpdated":"2026-08-05T09:13:22.549Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T09:13:22.549Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: add bounds checking in get_max_inline_xattr_value_size()\n\nNormally the extended attributes in the inode body would have been\nchecked when the inode is first opened, but if someone is writing to\nthe block device while the file system is mounted, it's possible for\nthe inode table to get corrupted.  Add bounds checking to avoid\nreading beyond the end of allocated memory if this happens."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached through the local VFS write path (write → ext4_write_begin → ext4_try_to_write_inline_data → ext4_get_max_inline_size → get_max_inline_xattr_value_size) on a mounted ext4 volume; there is no network or remote-protocol entry point.\nAC:L - A crafted ext4 image (and, as the fix notes, inode-table corruption via attacker-controlled writes to the underlying loop/block device while mounted) deterministically drives the unbounded xattr walk; the attacker controls both the image and the triggering write with no uncontrollable race.\nPR:L - An unprivileged local user can mount an attacker-authored ext4 image via common desktop/kiosk loop-setup paths (e.g. udisks2 polkit allow_active) and then write to a file on that mount; real init-namespace root is not required.\nUI:N - In the loop/automount scenario the attacker performs the mount and the triggering write themselves; no separate victim action is required.\nS:U - The OOB read and any resulting oops remain inside the host kernel's ext4/VFS authority and do not cross a VM, IOMMU, or sandbox boundary.\nC:H - The unfixed walk follows EXT4_XATTR_NEXT without an end bound, so it performs an unbounded out-of-bounds read past the inode buffer into adjacent kernel heap (KASAN slab-OOB/UAF Read, including into freed objects such as skbuff), which scores Confidentiality High under OOB-read guidance.\nI:N - The vulnerable function only reads xattr entry headers to compute a size; the fixed defect is a pure OOB read with no OOB write, reclaimable UAF write, or other integrity/control-flow primitive.\nA:H - Reading past the inode allocation into invalid/freed memory produces a kernel oops (as in the syzbot KASAN reports), which is a full availability impact under kernel CVSS guidance."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/inline.c"],"versions":[{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"5a229d21b98d132673096710e8281ef522dab1d1","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"3d7b8fbcd2273e2b9f4c6de5ce2f4c0cd3cb1205","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"486efbbc9445dca7890a1b86adbccb88b91284b0","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"4597554b4f7b29e7fd78aa449bab648f8da4ee2c","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"f22b274429e88d3dc7e79d375b56ce4f2f59f0b4","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"1d2caddbeeee56fbbc36b428c5b909c3ad88eb7f","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"e780058bd75614b66882bc02620ddbd884171560","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"88a06a94942c5c0a896e9da1113a6bb29e36cbef","status":"affected","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","lessThan":"2220eaf90992c11d888fe771055d4de330385f01","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/inline.c"],"versions":[{"version":"3.8","status":"affected"},{"version":"0","lessThan":"3.8","status":"unaffected","versionType":"semver"},{"version":"4.14.315","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.283","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.243","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.180","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.112","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.29","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2.16","lessThanOrEqual":"6.2.*","status":"unaffected","versionType":"semver"},{"version":"6.3.3","lessThanOrEqual":"6.3.*","status":"unaffected","versionType":"semver"},{"version":"6.4","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"4.14.315"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"4.19.283"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"5.4.243"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"5.10.180"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"5.15.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.1.29"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.2.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.3.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.4"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/5a229d21b98d132673096710e8281ef522dab1d1"},{"url":"https://git.kernel.org/stable/c/3d7b8fbcd2273e2b9f4c6de5ce2f4c0cd3cb1205"},{"url":"https://git.kernel.org/stable/c/486efbbc9445dca7890a1b86adbccb88b91284b0"},{"url":"https://git.kernel.org/stable/c/4597554b4f7b29e7fd78aa449bab648f8da4ee2c"},{"url":"https://git.kernel.org/stable/c/f22b274429e88d3dc7e79d375b56ce4f2f59f0b4"},{"url":"https://git.kernel.org/stable/c/1d2caddbeeee56fbbc36b428c5b909c3ad88eb7f"},{"url":"https://git.kernel.org/stable/c/e780058bd75614b66882bc02620ddbd884171560"},{"url":"https://git.kernel.org/stable/c/88a06a94942c5c0a896e9da1113a6bb29e36cbef"},{"url":"https://git.kernel.org/stable/c/2220eaf90992c11d888fe771055d4de330385f01"}],"title":"ext4: add bounds checking in get_max_inline_xattr_value_size()","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.8,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2023-53285","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-01-14T18:09:24.423172Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","description":"CWE-noinfo Not enough information"}]}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-01-14T18:12:55.248Z"}}]}}