{"api_version":"1","generated_at":"2026-08-29T12:12:53+00:00","cve":"CVE-2026-80598","urls":{"html":"https://cve.report/CVE-2026-80598","api":"https://cve.report/api/cve/CVE-2026-80598.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80598","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80598"},"summary":{"title":"ntfs3: fix out-of-bounds read in decompress_lznt","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nntfs3: fix out-of-bounds read in decompress_lznt\n\ndecompress_lznt() does not validate array index bounds before accessing\nthe decompression table. A corrupted NTFS3 image with invalid compressed\ndata can trigger an out-of-bounds read.\n\nAdd index bounds checking to prevent the OOB access.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-28 08:16:43","updated_at":"2026-08-29 07:16:44"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"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"}}],"references":[{"url":"https://git.kernel.org/stable/c/a93980141253c932aa6ae5d4422d90e0162dc774","name":"https://git.kernel.org/stable/c/a93980141253c932aa6ae5d4422d90e0162dc774","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bd77afca2ae9b6d44d37902e3ad672ebb028b070","name":"https://git.kernel.org/stable/c/bd77afca2ae9b6d44d37902e3ad672ebb028b070","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7160a57192fb16d7a6fa9b7f5c7ac341d2444a89","name":"https://git.kernel.org/stable/c/7160a57192fb16d7a6fa9b7f5c7ac341d2444a89","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/61415ffa365d2eca6986914afd0d1412444aa1dd","name":"https://git.kernel.org/stable/c/61415ffa365d2eca6986914afd0d1412444aa1dd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ff05a98150ebb2b03919a9c05c576681e86abbb7","name":"https://git.kernel.org/stable/c/ff05a98150ebb2b03919a9c05c576681e86abbb7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1113fa5b01a47a1a4cdbb9c695197ca6215f02a8","name":"https://git.kernel.org/stable/c/1113fa5b01a47a1a4cdbb9c695197ca6215f02a8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c694f8ea2611e7413b3f04ee47e04a9b7b45817b","name":"https://git.kernel.org/stable/c/c694f8ea2611e7413b3f04ee47e04a9b7b45817b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80598","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80598","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 1113fa5b01a47a1a4cdbb9c695197ca6215f02a8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 61415ffa365d2eca6986914afd0d1412444aa1dd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 bd77afca2ae9b6d44d37902e3ad672ebb028b070 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 c694f8ea2611e7413b3f04ee47e04a9b7b45817b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80598","cve":"CVE-2026-80598","epss":"0.001720000","percentile":"0.067650000","score_date":"2026-08-28","updated_at":"2026-08-29 00:12:17"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/ntfs3/lznt.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"1113fa5b01a47a1a4cdbb9c695197ca6215f02a8","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"61415ffa365d2eca6986914afd0d1412444aa1dd","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"bd77afca2ae9b6d44d37902e3ad672ebb028b070","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"c694f8ea2611e7413b3f04ee47e04a9b7b45817b","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"ff05a98150ebb2b03919a9c05c576681e86abbb7","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"a93980141253c932aa6ae5d4422d90e0162dc774","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"7160a57192fb16d7a6fa9b7f5c7ac341d2444a89","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"5.15.212","status":"affected","version":"0","versionType":"semver"},{"lessThan":"6.1.178","status":"affected","version":"0","versionType":"semver"},{"lessThan":"6.6.145","status":"affected","version":"0","versionType":"semver"},{"lessThan":"6.12.97","status":"affected","version":"0","versionType":"semver"},{"lessThan":"6.18.40","status":"affected","version":"0","versionType":"semver"},{"lessThan":"7.1.5","status":"affected","version":"0","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/ntfs3/lznt.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nntfs3: fix out-of-bounds read in decompress_lznt\n\ndecompress_lznt() does not validate array index bounds before accessing\nthe decompression table. A corrupted NTFS3 image with invalid compressed\ndata can trigger an out-of-bounds read.\n\nAdd index bounds checking to prevent the OOB access."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"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"},"scenarios":[{"lang":"en","value":"AV:L - decompress_lznt() is reached only when the kernel reads LZNT-compressed NTFS file data through local VFS paths (read/mmap/write on compressed files) after an ntfs3 mount; it is not invoked from network protocol parsers such as nfsd, ksmbd, or the TCP/IP stack.\nAC:L - Attacker fully controls the on-disk LZNT compressed stream in a crafted file/image and can reliably drive the index past s_max_off[] bounds to trigger the out-of-bounds read; syzbot/syzkaller reproduced this without races or attacker-uncontrollable memory layout.\nPR:L - Triggering decompression requires only read access to a compressed file via open/read/mmap, or mounting a malicious NTFS image which needs CAP_SYS_ADMIN obtainable by unprivileged users inside user+mount namespaces on typical Linux systems.\nUI:N - No separate victim action is required when the attacker has local access: they can mount a crafted NTFS image in a user namespace and read the malicious compressed file themselves to reach decompress_lznt() without anyone else interacting with the system.\nS:U - The flaw corrupts or discloses kernel memory during NTFS LZNT decompression within the same kernel security domain; it does not cross VM, container, or IOMMU boundaries and is not a sandbox or hypervisor escape.\nC:H - The bug performs out-of-bounds reads of kernel memory past the nine-element s_max_off[] table in .rodata, and attacker-controlled index values feed parse_pair() and decompression output, enabling disclosure of sensitive kernel data into page-cache buffers returned to userspace.\nI:H - Unbounded index growth from malformed LZNT input passes attacker-influenced shift widths into parse_pair(), producing malformed backreference offset/length pairs that drive the LZ copy loop and can corrupt kernel page-cache memory in ways chainable toward arbitrary write primitives.\nA:H - Out-of-bounds access to s_max_off[] is a kernel memory safety violation that KASAN/KFENCE report and can oops or panic the kernel; repeated reads of a malicious compressed file can reliably deny service to the reading process or the entire system."}]}],"providerMetadata":{"dateUpdated":"2026-08-29T06:21:09.879Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/1113fa5b01a47a1a4cdbb9c695197ca6215f02a8"},{"url":"https://git.kernel.org/stable/c/61415ffa365d2eca6986914afd0d1412444aa1dd"},{"url":"https://git.kernel.org/stable/c/bd77afca2ae9b6d44d37902e3ad672ebb028b070"},{"url":"https://git.kernel.org/stable/c/c694f8ea2611e7413b3f04ee47e04a9b7b45817b"},{"url":"https://git.kernel.org/stable/c/ff05a98150ebb2b03919a9c05c576681e86abbb7"},{"url":"https://git.kernel.org/stable/c/a93980141253c932aa6ae5d4422d90e0162dc774"},{"url":"https://git.kernel.org/stable/c/7160a57192fb16d7a6fa9b7f5c7ac341d2444a89"}],"title":"ntfs3: fix out-of-bounds read in decompress_lznt","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80598","datePublished":"2026-08-28T06:48:24.097Z","dateReserved":"2026-08-26T14:34:25.771Z","dateUpdated":"2026-08-29T06:21:09.879Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-28 08:16:43","lastModifiedDate":"2026-08-29 07:16:44","problem_types":[],"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}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80598","Ordinal":"1","Title":"ntfs3: fix out-of-bounds read in decompress_lznt","CVE":"CVE-2026-80598","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80598","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nntfs3: fix out-of-bounds read in decompress_lznt\n\ndecompress_lznt() does not validate array index bounds before accessing\nthe decompression table. A corrupted NTFS3 image with invalid compressed\ndata can trigger an out-of-bounds read.\n\nAdd index bounds checking to prevent the OOB access.","Type":"Description","Title":"ntfs3: fix out-of-bounds read in decompress_lznt"}]}}}