CVE-2026-89525

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89525", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.719Z", "datePublished": "2026-09-11T19:44:06.296Z", "dateUpdated": "2026-10-19T08:48:16.507Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:48:16.507Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: reject VAT indexes equal to the entry count\n\nUDF 1.50 virtual partition mapping uses the VAT as an array of physical\nblock mappings. s_num_entries stores the number of entries in that array,\nnot the highest valid index. The valid VAT indexes are therefore below\ns_num_entries.\n\nudf_get_pblock_virt15() currently rejects only indexes greater than\ns_num_entries. A crafted image can request index s_num_entries, pass the\nbounds check, and make the kernel read one entry past the allocated VAT table.\n\nChange the check to reject block >= s_num_entries, so the count is handled as\nan exclusive upper bound.\n\nA crafted UDF image reproduced this on origin/master commit\n0e35b9b6ec0ffcc5e23cbdec09f5c622ad532b53 with a KASAN slab-out-of-bounds\nreport in udf_get_pblock_virt15().\n\nTrail of Bits has a reproducer that triggers kernel panic demonstrating the bug, and can share it if needed."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/udf/partition.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "f64e01a90326bb85a3cc8aa0199931dc2f15b589", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "8a8c1c42a34349a0626d910abbad5a29136446b7", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "19f36c6453cd88fe6d60ef36ab1f1cad8ddf4ce4", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b77b83f5529a26d084d64ece98abd6f0cc86e053", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9193368408d792cec2057628d87862140fb1ce1c", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b95c33a4e743874f1b0a45bf2aaa4da553552bd1", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "1bd7947f1463c21edafa256d0fbec5b99215e2b6", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "cac0cb07f29ccfb373fd4a36c81e908ef3ce608c", "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/udf/partition.c"], "versions": [{"version": "2.6.12", "status": "affected"}, {"version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "2.6.12", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f64e01a90326bb85a3cc8aa0199931dc2f15b589"}, {"url": "https://git.kernel.org/stable/c/8a8c1c42a34349a0626d910abbad5a29136446b7"}, {"url": "https://git.kernel.org/stable/c/19f36c6453cd88fe6d60ef36ab1f1cad8ddf4ce4"}, {"url": "https://git.kernel.org/stable/c/b77b83f5529a26d084d64ece98abd6f0cc86e053"}, {"url": "https://git.kernel.org/stable/c/9193368408d792cec2057628d87862140fb1ce1c"}, {"url": "https://git.kernel.org/stable/c/b95c33a4e743874f1b0a45bf2aaa4da553552bd1"}, {"url": "https://git.kernel.org/stable/c/1bd7947f1463c21edafa256d0fbec5b99215e2b6"}, {"url": "https://git.kernel.org/stable/c/cac0cb07f29ccfb373fd4a36c81e908ef3ce608c"}], "title": "udf: reject VAT indexes equal to the entry count", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/udf/partition.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f64e01a90326bb85a3cc8aa0199931dc2f15b589", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "8a8c1c42a34349a0626d910abbad5a29136446b7", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "19f36c6453cd88fe6d60ef36ab1f1cad8ddf4ce4", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "b77b83f5529a26d084d64ece98abd6f0cc86e053", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "9193368408d792cec2057628d87862140fb1ce1c", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "b95c33a4e743874f1b0a45bf2aaa4da553552bd1", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "1bd7947f1463c21edafa256d0fbec5b99215e2b6", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "cac0cb07f29ccfb373fd4a36c81e908ef3ce608c", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/udf/partition.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.12"}, {"lessThan": "2.6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: reject VAT indexes equal to the entry count\n\nUDF 1.50 virtual partition mapping uses the VAT as an array of physical\nblock mappings. s_num_entries stores the number of entries in that array,\nnot the highest valid index. The valid VAT indexes are therefore below\ns_num_entries.\n\nudf_get_pblock_virt15() currently rejects only indexes greater than\ns_num_entries. A crafted image can request index s_num_entries, pass the\nbounds check, and make the kernel read one entry past the allocated VAT table.\n\nChange the check to reject block >= s_num_entries, so the count is handled as\nan exclusive upper bound.\n\nA crafted UDF image reproduced this on origin/master commit\n0e35b9b6ec0ffcc5e23cbdec09f5c622ad532b53 with a KASAN slab-out-of-bounds\nreport in udf_get_pblock_virt15().\n\nTrail of Bits has a reproducer that triggers kernel panic demonstrating the bug, and can share it if needed."}], "id": "CVE-2026-89525", "lastModified": "2026-10-19T09:17:47.013", "metrics": {}, "published": "2026-09-11T20:19:35.263", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/19f36c6453cd88fe6d60ef36ab1f1cad8ddf4ce4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1bd7947f1463c21edafa256d0fbec5b99215e2b6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8a8c1c42a34349a0626d910abbad5a29136446b7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9193368408d792cec2057628d87862140fb1ce1c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b77b83f5529a26d084d64ece98abd6f0cc86e053"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b95c33a4e743874f1b0a45bf2aaa4da553552bd1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cac0cb07f29ccfb373fd4a36c81e908ef3ce608c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f64e01a90326bb85a3cc8aa0199931dc2f15b589"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Denial of Service via out-of-bounds read in UDF virtual partition mapping", "id": "2532509", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532509"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1285", "details": ["A flaw was found in the Linux kernel. A local attacker could craft a malicious Universal Disk Format (UDF) image to trigger an out-of-bounds read vulnerability in the `udf_get_pblock_virt15()` function. This occurs when the system attempts to read a Virtual Allocation Table (VAT) index equal to the entry count, bypassing a bounds check. This can lead to reading memory beyond the allocated table, potentially causing a kernel panic and a denial of service."], "name": "CVE-2026-89525", "public_date": "2026-09-11T19:44:06Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89525\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89525\nhttps://git.kernel.org/stable/c/1bd7947f1463c21edafa256d0fbec5b99215e2b6\nhttps://git.kernel.org/stable/c/9193368408d792cec2057628d87862140fb1ce1c\nhttps://git.kernel.org/stable/c/b95c33a4e743874f1b0a45bf2aaa4da553552bd1\nhttps://git.kernel.org/stable/c/cac0cb07f29ccfb373fd4a36c81e908ef3ce608c"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,9193368408d792cec2057628d87862140fb1ce1c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b95c33a4e743874f1b0a45bf2aaa4da553552bd1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,1bd7947f1463c21edafa256d0fbec5b99215e2b6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,cac0cb07f29ccfb373fd4a36c81e908ef3ce608c)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T14:15:16.200113+00:00", "updated": "2026-09-15T22:30:15.256700+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}