{"id":"CVE-2026-72455","summary":"apparmor: fix uninitialised pointer passed to audit_log_untrustedstring()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix uninitialised pointer passed to audit_log_untrustedstring()\n\nCommit 4a134723f9f1 (\"apparmor: move check for aa_null file to cover all cases\")\nintrdouced a small bug, where path_name() may pass a potentially uninitialized\n*name to aa_audit_file() if the path-\u003edentry had been replaced with\naa_null.dentry earlier on. This can lead to page fault like one observed on\n7.0.2 openSUSE Tumbleweed kernel:\n\n[51692.242756] [  T24690] BUG: unable to handle page fault for address: 0000000f00000003\n[51692.242762] [  T24690] #PF: supervisor read access in kernel mode\n[51692.242763] [  T24690] #PF: error_code(0x0000) - not-present page\n[51692.242765] [  T24690] PGD 0 P4D 0\n[51692.242768] [  T24690] Oops: Oops: 0000 [#1] SMP NOPTI\n[51692.242772] [  T24690] CPU: 3 UID: 1020 PID: 24690 Comm: snap-confine Tainted: G           O        7.0.2-1-default #1 PREEMPT(full) openSUSE Tumbleweed  ab90b4c9940707f9cafa19bdad80b2cec52dbe51\n[51692.242775] [  T24690] Tainted: [O]=OOT_MODULE\n[51692.242777] [  T24690] Hardware name: Framework Laptop 13 (AMD Ryzen 7040Series)/FRANMDCP05, BIOS 03.18 01/08/2026\n[51692.242778] [  T24690] RIP: 0010:strlen+0x4/0x30\n[51692.242783] [  T24690] Code: f7 75 ec 31 c0 e9 17 9f 00 ff 48 89 f8 e9 0f 9f 00 ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa \u003c80\u003e 3f 00 74 18 48 89 f8 0f 1f 40 00 48 83 c0 01 80 38 00 75 f7 48\n[51692.242785] [  T24690] RSP: 0018:ffffd015eb1e3608 EFLAGS: 00010282\n[51692.242787] [  T24690] RAX: 0000000000000000 RBX: ffff89796198a360 RCX: 0000000000000000\n[51692.242788] [  T24690] RDX: 00000000000000d1 RSI: 0000000f00000003 RDI: 0000000f00000003\n[51692.242790] [  T24690] RBP: ffffffffb7ede090 R08: 00000000000005f5 R09: 0000000000000000\n[51692.242791] [  T24690] R10: 0000000000000000 R11: 0000000000000000 R12: ffffd015eb1e3700\n[51692.242792] [  T24690] R13: ffff8977a22bc380 R14: ffffffffb7ec5190 R15: ffff8977a0c8aa80\n[51692.242794] [  T24690] FS:  0000000000000000(0000) GS:ffff897f640d8000(0000) knlGS:0000000000000000\n[51692.242796] [  T24690] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[51692.242797] [  T24690] CR2: 0000000f00000003 CR3: 00000006ad15f000 CR4: 0000000000f50ef0\n[51692.242799] [  T24690] PKRU: 55555554\n[51692.242800] [  T24690] Call Trace:\n[51692.242802] [  T24690]  \u003cTASK\u003e\n[51692.242804] [  T24690]  audit_log_untrustedstring+0x1d/0x40\n[51692.242811] [  T24690]  common_lsm_audit+0x71/0x1d0\n[51692.242816] [  T24690]  aa_audit+0x5a/0x170\n[51692.242819] [  T24690]  aa_audit_file+0x18a/0x1b0\n[51692.242825] [  T24690]  path_name+0xd2/0x100\n[51692.242829] [  T24690]  profile_path_perm.part.0+0x58/0xb0\n[51692.242832] [  T24690]  aa_path_perm+0xef/0x150\n[51692.242837] [  T24690]  apparmor_file_open+0x153/0x2e0\n[51692.242840] [  T24690]  security_file_open+0x46/0xd0\n[51692.242844] [  T24690]  do_dentry_open+0xe9/0x4d0\n[51692.242848] [  T24690]  vfs_open+0x30/0x100\n\nWhile here, initialise variables which are passed down to path_name().","modified":"2026-08-18T03:56:26.056851298Z","published":"2026-08-15T05:57:02.234Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72455.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2791dd42d41e38805572b12116f721c97c4fcc0c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a5c79d44ef19203bd7cf6f3de8ff088112ebff95"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bcd1b34c21748531a3febaf7440632b89d8deab7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72455.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72455"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b2a8011ae8749215f3939881239b454728a2d88b"},{"fixed":"2791dd42d41e38805572b12116f721c97c4fcc0c"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4a134723f9f1ad2f3621566259db673350d19cb1"},{"fixed":"a5c79d44ef19203bd7cf6f3de8ff088112ebff95"},{"fixed":"bcd1b34c21748531a3febaf7440632b89d8deab7"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"d276f52ecaf854e41549311e93802afea0abab5b"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.18.14"},{"fixed":"6.18.40"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.19.4"},{"fixed":"6.20"}]}],"versions":["v6.18.39","v6.18.38","v6.18.37","v6.18.36","v6.18.35","v6.18.34","v6.18.33","v6.18.32","v6.18.31","v6.18.30","v6.18.29","v6.18.28","v6.18.27","v6.18.26","v6.18.25","v6.18.24","v6.18.23","v6.18.22","v6.18.21","v6.18.20","v6.18.19","v6.18.18","v6.18.17","v6.18.16","v6.18.15","v6.18.14","v6.19-rc2","v6.19","v6.19.3","v6.19.2","v6.19.1","v6.19-rc8","v6.19-rc1","v6.19-rc6","v6.19-rc7","v6.19-rc5","v6.19-rc4","v6.19-rc3","v6.18","v6.18-rc1","v6.18-rc7","v6.18-rc3","v6.18-rc5","v6.18-rc6","v6.18-rc2","v6.18-rc4","v6.17","v6.17-rc7","v6.17-rc1","v6.17-rc2","v6.17-rc6","v6.17-rc4","v6.17-rc5","v6.17-rc3","v6.16","v6.16-rc6","v6.16-rc1","v6.16-rc4","v6.16-rc2","v6.16-rc5","v6.16-rc7","v6.16-rc3","v6.14-rc3","v6.15","v6.15-rc1","v6.15-rc6","v6.15-rc3","v6.15-rc2","v6.15-rc7","v6.15-rc4","v6.15-rc5","v6.14","v6.14-rc1","v6.14-rc7","v6.14-rc6","v6.14-rc4","v6.14-rc5","v6.14-rc2","v6.13","v6.13-rc1","v6.13-rc6","v6.13-rc7","v6.13-rc2","v6.13-rc5","v6.13-rc3","v6.12-rc1","v6.13-rc4","v6.12","v6.12-rc7","v6.12-rc3","v6.12-rc4","v6.12-rc6","v6.12-rc5","v6.12-rc2","v6.11-rc1","v6.11-rc5","v6.11","v6.11-rc7","v6.10-rc1","v6.11-rc6","v6.11-rc3","v6.11-rc4","v6.11-rc2","v6.10","v6.10-rc6","v6.10-rc7","v6.10-rc3","v6.9-rc1","v6.10-rc5","v6.10-rc2","v6.10-rc4","v6.9","v6.9-rc6","v6.9-rc7","v6.9-rc5","v6.9-rc3","v6.9-rc2","v6.8","v6.9-rc4","v6.8-rc1","v6.7-rc1","v6.8-rc7","v6.8-rc6","v6.8-rc5","v6.8-rc4","v6.8-rc3","v6.8-rc2","v6.7","v6.7-rc3","v6.7-rc8","v6.7-rc7","v6.7-rc6","v6.7-rc2","v6.7-rc4","v6.7-rc5","v6.6","v6.6-rc1","v6.6-rc5","v6.6-rc3","v6.6-rc7","v6.6-rc6","v6.6-rc4","v6.6-rc2","v6.5","v6.5-rc1","v6.5-rc2","v6.5-rc7","v6.5-rc4","v6.5-rc3","v6.5-rc6","v6.5-rc5","v6.4","v6.4-rc7","v6.4-rc1","v6.4-rc6","v6.4-rc5","v6.4-rc3","v6.4-rc4","v6.4-rc2","v6.3","v6.3-rc1","v6.3-rc7","v6.3-rc2","v6.3-rc3","v6.3-rc5","v6.3-rc6","v6.3-rc4","v6.2-rc6","v6.2-rc1","v6.2","v6.2-rc2","v6.2-rc8","v6.2-rc5","v6.2-rc4","v6.2-rc7","v6.2-rc3","v6.1-rc1","v6.1","v6.1-rc8","v6.1-rc3","v6.1-rc6","v6.1-rc7","v6.1-rc4","v6.1-rc2","v6.1-rc5","v6.0-rc1","v6.0","v6.0-rc7","v6.0-rc3","v6.0-rc2","v6.0-rc6","v6.0-rc4","v6.0-rc5","v5.19","v5.19-rc1","v5.19-rc5","v5.19-rc8","v5.19-rc6","v5.18","v5.19-rc2","v5.19-rc7","v5.19-rc3","v5.19-rc4","v5.18-rc1","v5.18-rc7","v5.18-rc2","v5.18-rc5","v5.17","v5.18-rc4","v5.18-rc3","v5.18-rc6","v5.17-rc6","v5.17-rc4","v5.17-rc8","v5.17-rc7","v5.17-rc1","v5.17-rc3","v5.17-rc2","v5.17-rc5","v5.16","v5.16-rc1","v5.16-rc8","v5.16-rc5","v5.16-rc6","v5.16-rc7","v5.16-rc3","v5.16-rc2","v5.16-rc4","v5.15","v5.15-rc2","v5.15-rc1","v5.15-rc4","v5.15-rc7","v5.15-rc3","v5.15-rc5","v5.15-rc6","v5.14","v5.14-rc3","v5.14-rc1","v5.14-rc2","v5.14-rc7","v5.14-rc6","v5.13-rc1","v5.14-rc5","v5.14-rc4","v5.13","v5.13-rc6","v5.13-rc7","v5.13-rc3","v5.13-rc2","v5.13-rc4","v5.13-rc5","v5.12","v5.12-rc2","v5.12-rc1-dontuse","v5.12-rc1","v5.12-rc8","v5.12-rc3","v5.12-rc7","v5.12-rc5","v5.12-rc6","v5.12-rc4","v5.10","v5.11","v5.11-rc3","v5.11-rc7","v5.11-rc6","v5.11-rc5","v5.11-rc1","v5.11-rc4","v5.11-rc2","v5.10-rc1","v5.10-rc7","v5.10-rc4","v5.10-rc3","v5.10-rc6","v5.9","v5.10-rc2","v5.10-rc5","v5.9-rc1","v5.9-rc7","v5.9-rc8","v5.9-rc6","v5.9-rc4","v5.9-rc5","v5.9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