{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-53826", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-09T01:27:17.824Z", "datePublished": "2025-12-09T01:29:39.679Z", "dateUpdated": "2026-05-11T19:52:16.903Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:52:16.903Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nubi: Fix UAF wear-leveling entry in eraseblk_count_seq_show()\n\nWear-leveling entry could be freed in error path, which may be accessed\nagain in eraseblk_count_seq_show(), for example:\n\n__erase_worker eraseblk_count_seq_show\n wl = ubi->lookuptbl[*block_number]\n\t\t\t\tif (wl)\n wl_entry_destroy\n ubi->lookuptbl[e->pnum] = NULL\n kmem_cache_free(ubi_wl_entry_slab, e)\n\t\t erase_count = wl->ec // UAF!\n\nWear-leveling entry updating/accessing in ubi->lookuptbl should be\nprotected by ubi->wl_lock, fix it by adding ubi->wl_lock to serialize\nwl entry accessing between wl_entry_destroy() and\neraseblk_count_seq_show().\n\nFetch a reproducer in [Link]."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/mtd/ubi/wl.c"], "versions": [{"version": "801c135ce73d5df1caf3eca35b66a10824ae0707", "lessThan": "3f9b63dfce44a7c3c095dd93d910408e07ab1845", "status": "affected", "versionType": "git"}, {"version": "801c135ce73d5df1caf3eca35b66a10824ae0707", "lessThan": "84250da1c63cb7d421a3b4812b5c2ce2e47d31a1", "status": "affected", "versionType": "git"}, {"version": "801c135ce73d5df1caf3eca35b66a10824ae0707", "lessThan": "1cb14c06d6035539ef4215c4ba0871aea71d7c38", "status": "affected", "versionType": "git"}, {"version": "801c135ce73d5df1caf3eca35b66a10824ae0707", "lessThan": "9d448dd6bcb61a508204b57ea1f454ba9bac2f24", "status": "affected", "versionType": "git"}, {"version": "801c135ce73d5df1caf3eca35b66a10824ae0707", "lessThan": "79548ccdd992707879b4b683b7251c58ddf26f12", "status": "affected", "versionType": "git"}, {"version": "801c135ce73d5df1caf3eca35b66a10824ae0707", "lessThan": "84253f3c2dad6be10d30c92626c763d9a9f512ad", "status": "affected", "versionType": "git"}, {"version": "801c135ce73d5df1caf3eca35b66a10824ae0707", "lessThan": "a100de2974d208cfca032179b02ed4d1a0a7f143", "status": "affected", "versionType": "git"}, {"version": "801c135ce73d5df1caf3eca35b66a10824ae0707", "lessThan": "a240bc5c43130c6aa50831d7caaa02a1d84e1bce", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/mtd/ubi/wl.c"], "versions": [{"version": "2.6.22", "status": "affected"}, {"version": "0", "lessThan": "2.6.22", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.308", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.276", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.235", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.173", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.100", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.18", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2.5", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.3", "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": "2.6.22", "versionEndExcluding": "4.14.308"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "4.19.276"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "5.4.235"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "5.10.173"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "5.15.100"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.1.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3f9b63dfce44a7c3c095dd93d910408e07ab1845"}, {"url": "https://git.kernel.org/stable/c/84250da1c63cb7d421a3b4812b5c2ce2e47d31a1"}, {"url": "https://git.kernel.org/stable/c/1cb14c06d6035539ef4215c4ba0871aea71d7c38"}, {"url": "https://git.kernel.org/stable/c/9d448dd6bcb61a508204b57ea1f454ba9bac2f24"}, {"url": "https://git.kernel.org/stable/c/79548ccdd992707879b4b683b7251c58ddf26f12"}, {"url": "https://git.kernel.org/stable/c/84253f3c2dad6be10d30c92626c763d9a9f512ad"}, {"url": "https://git.kernel.org/stable/c/a100de2974d208cfca032179b02ed4d1a0a7f143"}, {"url": "https://git.kernel.org/stable/c/a240bc5c43130c6aa50831d7caaa02a1d84e1bce"}], "title": "ubi: Fix UAF wear-leveling entry in eraseblk_count_seq_show()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nubi: Fix UAF wear-leveling entry in eraseblk_count_seq_show()\n\nWear-leveling entry could be freed in error path, which may be accessed\nagain in eraseblk_count_seq_show(), for example:\n\n__erase_worker eraseblk_count_seq_show\n wl = ubi->lookuptbl[*block_number]\n\t\t\t\tif (wl)\n wl_entry_destroy\n ubi->lookuptbl[e->pnum] = NULL\n kmem_cache_free(ubi_wl_entry_slab, e)\n\t\t erase_count = wl->ec // UAF!\n\nWear-leveling entry updating/accessing in ubi->lookuptbl should be\nprotected by ubi->wl_lock, fix it by adding ubi->wl_lock to serialize\nwl entry accessing between wl_entry_destroy() and\neraseblk_count_seq_show().\n\nFetch a reproducer in [Link]."}], "id": "CVE-2023-53826", "lastModified": "2026-04-15T00:35:42.020", "metrics": {}, "published": "2025-12-09T16:17:21.457", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1cb14c06d6035539ef4215c4ba0871aea71d7c38"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3f9b63dfce44a7c3c095dd93d910408e07ab1845"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/79548ccdd992707879b4b683b7251c58ddf26f12"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/84250da1c63cb7d421a3b4812b5c2ce2e47d31a1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/84253f3c2dad6be10d30c92626c763d9a9f512ad"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9d448dd6bcb61a508204b57ea1f454ba9bac2f24"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a100de2974d208cfca032179b02ed4d1a0a7f143"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a240bc5c43130c6aa50831d7caaa02a1d84e1bce"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: ubi: Fix UAF wear-leveling entry in eraseblk_count_seq_show()", "id": "2420345", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2420345"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2023-53826", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53826\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53826\nhttps://lore.kernel.org/linux-cve-announce/2025120951-CVE-2023-53826-26a2@gregkh/T"], "threat_severity": "Low"}

{}