{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80598", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.771Z", "datePublished": "2026-08-28T06:48:24.097Z", "dateUpdated": "2026-10-16T19:26:29.603Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-30T07:08:34.000Z" }, "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": { "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" }, "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/ntfs3/lznt.c" ], "versions": [ { "version": "522e010b58379fbe19b38fdef5016bca0c3cf405", "lessThan": "1113fa5b01a47a1a4cdbb9c695197ca6215f02a8", "status": "affected", "versionType": "git" }, { "version": "522e010b58379fbe19b38fdef5016bca0c3cf405", "lessThan": "61415ffa365d2eca6986914afd0d1412444aa1dd", "status": "affected", "versionType": "git" }, { "version": "522e010b58379fbe19b38fdef5016bca0c3cf405", "lessThan": "bd77afca2ae9b6d44d37902e3ad672ebb028b070", "status": "affected", "versionType": "git" }, { "version": "522e010b58379fbe19b38fdef5016bca0c3cf405", "lessThan": "c694f8ea2611e7413b3f04ee47e04a9b7b45817b", "status": "affected", "versionType": "git" }, { "version": "522e010b58379fbe19b38fdef5016bca0c3cf405", "lessThan": "ff05a98150ebb2b03919a9c05c576681e86abbb7", "status": "affected", "versionType": "git" }, { "version": "522e010b58379fbe19b38fdef5016bca0c3cf405", "lessThan": "a93980141253c932aa6ae5d4422d90e0162dc774", "status": "affected", "versionType": "git" }, { "version": "522e010b58379fbe19b38fdef5016bca0c3cf405", "lessThan": "7160a57192fb16d7a6fa9b7f5c7ac341d2444a89", "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/ntfs3/lznt.c" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "5.15", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.2" } ] } ] } ], "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" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-80598", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-10-16T19:18:18.558534Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:26:29.603Z" } } ] } }