{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-97439", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T14:53:16.869Z", "datePublished": "2026-09-24T16:03:52.427Z", "dateUpdated": "2026-10-03T10:58:24.299Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-03T10:58:24.299Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: preserve non-DOS attribute bits in system.dos_attrib\n\n[BUG]\nA corrupted ntfs3 image can hit a NULL function pointer call in\ngeneric_perform_write() after toggling system.ntfs_attrib and then\noverwriting system.dos_attrib on the same file.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000000\n\\#PF: supervisor instruction fetch in kernel mode\n\\#PF: error_code(0x0010) - not-present page\nPGD bed5067 P4D bed5067 PUD 0\nOops: Oops: 0010 [#1] SMP KASAN NOPTI\nRIP: 0010:0x0\nCode: Unable to access opcode bytes at 0xffffffffffffffd6.\nRSP: 0018:ffff88801025f988 EFLAGS: 00010246\nCall Trace:\n generic_perform_write+0x409/0x8c0 mm/filemap.c:4255\n __generic_file_write_iter+0x1bb/0x200 mm/filemap.c:4372\n ntfs_file_write_iter+0xcd9/0x1c20 fs/ntfs3/file.c:1253\n new_sync_write fs/read_write.c:593 [inline]\n vfs_write+0x63b/0xf70 fs/read_write.c:686\n ksys_write+0x133/0x250 fs/read_write.c:738\n __do_sys_write fs/read_write.c:749 [inline]\n __se_sys_write fs/read_write.c:746 [inline]\n __x64_sys_write+0x77/0xc0 fs/read_write.c:746\n ...\n\n[CAUSE]\nsystem.ntfs_attrib updates ATTR_DATA flags via ni_new_attr_flags()\nand switches i_mapping->a_ops to ntfs_aops_cmpr when\nFILE_ATTRIBUTE_COMPRESSED is set. system.dos_attrib then overwrites\nni->std_fa from a one-byte DOS attribute value, clearing the compression\nbit without updating ATTR_DATA or the mapping operations.\n\nOld buffered writes use is_compressed(ni) to choose\n__generic_file_write_iter(). That leaves generic_perform_write() calling\na NULL write_begin callback from ntfs_aops_cmpr.\n\n[FIX]\nTreat system.dos_attrib as a low-byte DOS attribute update and preserve the\nexisting non-DOS attribute bits in ni->std_fa. This keeps compressed and\nsparse state consistent with ATTR_DATA and the mapping operations while\nkeeping the existing DOS attribute semantics intact." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/ntfs3/xattr.c" ], "versions": [ { "version": "be71b5cba2e6485e8959da7a9f9a44461a1bb074", "lessThan": "533217b90addd57cc16f1c974e023c72d18949c7", "status": "affected", "versionType": "git" }, { "version": "be71b5cba2e6485e8959da7a9f9a44461a1bb074", "lessThan": "f2d6bc89e2236939df189831707c8cdad199f57a", "status": "affected", "versionType": "git" }, { "version": "be71b5cba2e6485e8959da7a9f9a44461a1bb074", "lessThan": "fdc9f65aa6631df04238c6154713bacd5133d77c", "status": "affected", "versionType": "git" }, { "version": "be71b5cba2e6485e8959da7a9f9a44461a1bb074", "lessThan": "2de91ae285b0b878604d2bd83c3c395a8071e482", "status": "affected", "versionType": "git" }, { "version": "be71b5cba2e6485e8959da7a9f9a44461a1bb074", "lessThan": "407ee19828a7d9700969ed9cc53be50d0f533619", "status": "affected", "versionType": "git" }, { "version": "be71b5cba2e6485e8959da7a9f9a44461a1bb074", "lessThan": "b1c1101067d9536bcb0fe023b96ee2dde5535959", "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/xattr.c" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.53", "lessThanOrEqual": "6.18.*", "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": "5.15.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.111" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/533217b90addd57cc16f1c974e023c72d18949c7" }, { "url": "https://git.kernel.org/stable/c/f2d6bc89e2236939df189831707c8cdad199f57a" }, { "url": "https://git.kernel.org/stable/c/fdc9f65aa6631df04238c6154713bacd5133d77c" }, { "url": "https://git.kernel.org/stable/c/2de91ae285b0b878604d2bd83c3c395a8071e482" }, { "url": "https://git.kernel.org/stable/c/407ee19828a7d9700969ed9cc53be50d0f533619" }, { "url": "https://git.kernel.org/stable/c/b1c1101067d9536bcb0fe023b96ee2dde5535959" } ], "title": "fs/ntfs3: preserve non-DOS attribute bits in system.dos_attrib", "x_generator": { "engine": "bippy-1.2.0" } } } }