{"api_version":"1","generated_at":"2026-09-12T03:40:09+00:00","cve":"CVE-2026-89616","urls":{"html":"https://cve.report/CVE-2026-89616","api":"https://cve.report/api/cve/CVE-2026-89616.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89616","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89616"},"summary":{"title":"fs/ntfs3: fix info-leak on partial LZNT decompress in ni_read_frame()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix info-leak on partial LZNT decompress in ni_read_frame()\n\nni_read_frame() decompresses an LZNT $DATA frame into the vmapped target\npages and then trusts decompress_lznt()'s return value:\n\n  unc_size = decompress_lznt(frame_ondisk, ondisk_size, frame_mem,\n                             frame_size);\n  if ((ssize_t)unc_size < 0)        err = unc_size;\n  else if (!unc_size || unc_size > frame_size)  err = -EINVAL;\n\ndecompress_lznt() stops as soon as the compressed stream is exhausted\n(e.g. a zero chunk header) and returns the number of bytes it actually\nwrote, which may be far less than frame_size. The bytes between unc_size\nand frame_size are never written. The only memset() that follows zeroes\nthe region beyond i_valid; when the frame lies entirely within the file's\nvalid size that memset() does not run, so the gap retains whatever was in\nthe just-vmapped pages. All pages are then marked uptodate and returned\nto userspace, disclosing uninitialized (recently-freed) kernel page\nmemory. A crafted compressed file whose stream decompresses to only a few\nbytes leaks the remainder of every frame on a plain read(2), which is\nenough to recover kernel pointers and defeat KASLR.\n\nZero the [unc_size, frame_size) tail immediately after a successful LZNT\ndecompress so the remainder reads back as zero.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:19:46","updated_at":"2026-09-11 20:19:46"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/35d1ea92c7d946e2ebdbe36cdb2c969c8704bebd","name":"https://git.kernel.org/stable/c/35d1ea92c7d946e2ebdbe36cdb2c969c8704bebd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0f699ddb290a24b37e1bc9bf1e3c9dbccf564bea","name":"https://git.kernel.org/stable/c/0f699ddb290a24b37e1bc9bf1e3c9dbccf564bea","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4a1b39b2e10eb8de86265e80cf2be4396bc1dce4","name":"https://git.kernel.org/stable/c/4a1b39b2e10eb8de86265e80cf2be4396bc1dce4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/376ee45659a4b943df672ad275c63da00655f929","name":"https://git.kernel.org/stable/c/376ee45659a4b943df672ad275c63da00655f929","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89616","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89616","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4342306f0f0d5ff4315a204d315c1b51b914fca5 0f699ddb290a24b37e1bc9bf1e3c9dbccf564bea git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4342306f0f0d5ff4315a204d315c1b51b914fca5 376ee45659a4b943df672ad275c63da00655f929 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4342306f0f0d5ff4315a204d315c1b51b914fca5 4a1b39b2e10eb8de86265e80cf2be4396bc1dce4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4342306f0f0d5ff4315a204d315c1b51b914fca5 35d1ea92c7d946e2ebdbe36cdb2c969c8704bebd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.109 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.50 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/ntfs3/frecord.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0f699ddb290a24b37e1bc9bf1e3c9dbccf564bea","status":"affected","version":"4342306f0f0d5ff4315a204d315c1b51b914fca5","versionType":"git"},{"lessThan":"376ee45659a4b943df672ad275c63da00655f929","status":"affected","version":"4342306f0f0d5ff4315a204d315c1b51b914fca5","versionType":"git"},{"lessThan":"4a1b39b2e10eb8de86265e80cf2be4396bc1dce4","status":"affected","version":"4342306f0f0d5ff4315a204d315c1b51b914fca5","versionType":"git"},{"lessThan":"35d1ea92c7d946e2ebdbe36cdb2c969c8704bebd","status":"affected","version":"4342306f0f0d5ff4315a204d315c1b51b914fca5","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/ntfs3/frecord.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.15"},{"lessThan":"5.15","status":"unaffected","version":"0","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-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.109","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.50","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"5.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix info-leak on partial LZNT decompress in ni_read_frame()\n\nni_read_frame() decompresses an LZNT $DATA frame into the vmapped target\npages and then trusts decompress_lznt()'s return value:\n\n  unc_size = decompress_lznt(frame_ondisk, ondisk_size, frame_mem,\n                             frame_size);\n  if ((ssize_t)unc_size < 0)        err = unc_size;\n  else if (!unc_size || unc_size > frame_size)  err = -EINVAL;\n\ndecompress_lznt() stops as soon as the compressed stream is exhausted\n(e.g. a zero chunk header) and returns the number of bytes it actually\nwrote, which may be far less than frame_size. The bytes between unc_size\nand frame_size are never written. The only memset() that follows zeroes\nthe region beyond i_valid; when the frame lies entirely within the file's\nvalid size that memset() does not run, so the gap retains whatever was in\nthe just-vmapped pages. All pages are then marked uptodate and returned\nto userspace, disclosing uninitialized (recently-freed) kernel page\nmemory. A crafted compressed file whose stream decompresses to only a few\nbytes leaks the remainder of every frame on a plain read(2), which is\nenough to recover kernel pointers and defeat KASLR.\n\nZero the [unc_size, frame_size) tail immediately after a successful LZNT\ndecompress so the remainder reads back as zero."}],"providerMetadata":{"dateUpdated":"2026-09-11T19:45:16.064Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/0f699ddb290a24b37e1bc9bf1e3c9dbccf564bea"},{"url":"https://git.kernel.org/stable/c/376ee45659a4b943df672ad275c63da00655f929"},{"url":"https://git.kernel.org/stable/c/4a1b39b2e10eb8de86265e80cf2be4396bc1dce4"},{"url":"https://git.kernel.org/stable/c/35d1ea92c7d946e2ebdbe36cdb2c969c8704bebd"}],"title":"fs/ntfs3: fix info-leak on partial LZNT decompress in ni_read_frame()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89616","datePublished":"2026-09-11T19:45:16.064Z","dateReserved":"2026-09-11T19:38:34.735Z","dateUpdated":"2026-09-11T19:45:16.064Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:19:46","lastModifiedDate":"2026-09-11 20:19:46","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89616","Ordinal":"1","Title":"fs/ntfs3: fix info-leak on partial LZNT decompress in ni_read_fr","CVE":"CVE-2026-89616","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89616","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix info-leak on partial LZNT decompress in ni_read_frame()\n\nni_read_frame() decompresses an LZNT $DATA frame into the vmapped target\npages and then trusts decompress_lznt()'s return value:\n\n  unc_size = decompress_lznt(frame_ondisk, ondisk_size, frame_mem,\n                             frame_size);\n  if ((ssize_t)unc_size < 0)        err = unc_size;\n  else if (!unc_size || unc_size > frame_size)  err = -EINVAL;\n\ndecompress_lznt() stops as soon as the compressed stream is exhausted\n(e.g. a zero chunk header) and returns the number of bytes it actually\nwrote, which may be far less than frame_size. The bytes between unc_size\nand frame_size are never written. The only memset() that follows zeroes\nthe region beyond i_valid; when the frame lies entirely within the file's\nvalid size that memset() does not run, so the gap retains whatever was in\nthe just-vmapped pages. All pages are then marked uptodate and returned\nto userspace, disclosing uninitialized (recently-freed) kernel page\nmemory. A crafted compressed file whose stream decompresses to only a few\nbytes leaks the remainder of every frame on a plain read(2), which is\nenough to recover kernel pointers and defeat KASLR.\n\nZero the [unc_size, frame_size) tail immediately after a successful LZNT\ndecompress so the remainder reads back as zero.","Type":"Description","Title":"fs/ntfs3: fix info-leak on partial LZNT decompress in ni_read_fr"}]}}}