CVE-2026-72455
- Source
- https://cve.org/CVERecord?id=CVE-2026-72455
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72455.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-72455
- Downstream
- Published
- 2026-08-15T05:57:02.234Z
- Modified
- 2026-08-18T03:56:26.056851298Z
- Severity
-
- 7.1 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
- Summary
- apparmor: fix uninitialised pointer passed to audit_log_untrustedstring()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
apparmor: fix uninitialised pointer passed to auditloguntrustedstring()
Commit 4a134723f9f1 ("apparmor: move check for aanull file to cover all cases") intrdouced a small bug, where pathname() may pass a potentially uninitialized *name to aaauditfile() if the path->dentry had been replaced with aa_null.dentry earlier on. This can lead to page fault like one observed on 7.0.2 openSUSE Tumbleweed kernel:
[51692.242756] [ T24690] BUG: unable to handle page fault for address: 0000000f00000003 [51692.242762] [ T24690] #PF: supervisor read access in kernel mode [51692.242763] [ T24690] #PF: errorcode(0x0000) - not-present page [51692.242765] [ T24690] PGD 0 P4D 0 [51692.242768] [ T24690] Oops: Oops: 0000 [#1] SMP NOPTI [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 [51692.242775] [ T24690] Tainted: [O]=OOTMODULE [51692.242777] [ T24690] Hardware name: Framework Laptop 13 (AMD Ryzen 7040Series)/FRANMDCP05, BIOS 03.18 01/08/2026 [51692.242778] [ T24690] RIP: 0010:strlen+0x4/0x30 [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 <80> 3f 00 74 18 48 89 f8 0f 1f 40 00 48 83 c0 01 80 38 00 75 f7 48 [51692.242785] [ T24690] RSP: 0018:ffffd015eb1e3608 EFLAGS: 00010282 [51692.242787] [ T24690] RAX: 0000000000000000 RBX: ffff89796198a360 RCX: 0000000000000000 [51692.242788] [ T24690] RDX: 00000000000000d1 RSI: 0000000f00000003 RDI: 0000000f00000003 [51692.242790] [ T24690] RBP: ffffffffb7ede090 R08: 00000000000005f5 R09: 0000000000000000 [51692.242791] [ T24690] R10: 0000000000000000 R11: 0000000000000000 R12: ffffd015eb1e3700 [51692.242792] [ T24690] R13: ffff8977a22bc380 R14: ffffffffb7ec5190 R15: ffff8977a0c8aa80 [51692.242794] [ T24690] FS: 0000000000000000(0000) GS:ffff897f640d8000(0000) knlGS:0000000000000000 [51692.242796] [ T24690] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [51692.242797] [ T24690] CR2: 0000000f00000003 CR3: 00000006ad15f000 CR4: 0000000000f50ef0 [51692.242799] [ T24690] PKRU: 55555554 [51692.242800] [ T24690] Call Trace: [51692.242802] [ T24690] <TASK> [51692.242804] [ T24690] auditloguntrustedstring+0x1d/0x40 [51692.242811] [ T24690] commonlsmaudit+0x71/0x1d0 [51692.242816] [ T24690] aaaudit+0x5a/0x170 [51692.242819] [ T24690] aaauditfile+0x18a/0x1b0 [51692.242825] [ T24690] pathname+0xd2/0x100 [51692.242829] [ T24690] profilepathperm.part.0+0x58/0xb0 [51692.242832] [ T24690] aapathperm+0xef/0x150 [51692.242837] [ T24690] apparmorfileopen+0x153/0x2e0 [51692.242840] [ T24690] securityfileopen+0x46/0xd0 [51692.242844] [ T24690] dodentryopen+0xe9/0x4d0 [51692.242848] [ T24690] vfs_open+0x30/0x100
While here, initialise variables which are passed down to path_name().
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72455.json" }- References
-
- https://git.kernel.org/stable/c/2791dd42d41e38805572b12116f721c97c4fcc0c
- https://git.kernel.org/stable/c/a5c79d44ef19203bd7cf6f3de8ff088112ebff95
- https://git.kernel.org/stable/c/bcd1b34c21748531a3febaf7440632b89d8deab7
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72455.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-72455
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / 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
-
Introducedb2a8011ae8749215f3939881239b454728a2d88bFixed2791dd42d41e38805572b12116f721c97c4fcc0c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced4a134723f9f1ad2f3621566259db673350d19cb1Fixeda5c79d44ef19203bd7cf6f3de8ff088112ebff95Fixedbcd1b34c21748531a3febaf7440632b89d8deab7
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedLast affectedd276f52ecaf854e41549311e93802afea0abab5b
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.18.14Fixed6.18.40
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.19.4Fixed6.20