Description
In the Linux kernel, the following vulnerability has been resolved:
audit: fix out-of-bounds read in audit_compare_dname_path()
When a watch on dir=/ is combined with an fsnotify event for a
single-character name directly under / (e.g., creating /a), an
out-of-bounds read can occur in audit_compare_dname_path().
The helper parent_len() returns 1 for "/". In audit_compare_dname_path(),
when parentlen equals the full path length (1), the code sets p = path + 1
and pathlen = 1 - 1 = 0. The subsequent loop then dereferences
p[pathlen - 1] (i.e., p[-1]), causing an out-of-bounds read.
Fix this by adding a pathlen > 0 check to the while loop condition
to prevent the out-of-bounds access.
[PM: subject tweak, sign-off email fixes]
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 6.14 | 6.16.6 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 6.16.6-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | linux-azure-fde | No fix yet | — |
| Ubuntu 24.04 LTS | linux-intel +18 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime-6.14 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | rv +76 | 6.12.0-124.27.1.el10_1 | RHSA-2026:0453 |
| RHEL 9 | rv +75 | 5.14.0-611.20.1.el9_7 | RHSA-2026:0445 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | kernel-doc +1 | 6.12.0-124.27.1.el10_1 | ALSA-2026:0453 |
| AlmaLinux 9 | rv +73 | 5.14.0-611.20.1.el9_7 | ALSA-2026:0445 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | kernel | 6.12.0-124.27.1.el10_1 | RLSA-2026:0453 |
| Rocky Linux 9 | kernel | 5.14.0-611.20.1.el9_7 | RLSA-2026:0445 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | rv +29 | 6.12.0-124.27.1.el10_1 | ELSA-2026-0453 |
| Oracle Linux 9 | rv +28 | 5.14.0-611.20.1.el9_7 | ELSA-2026-0445 |
Advisories 10
- WID-SEC-2025-2099 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- ALSA-2026:0445 Moderate: kernel security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:0453 Important: kernel security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2026-2253 IBM Security Verify Access: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- RHSA-2026:0453 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:0445 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jul 30, 2026
- RLSA-2026:0445 Moderate: kernel security update Rocky Linux Security Advisories · Jan 17, 2026
- RLSA-2026:0453 Important: kernel security update Rocky Linux Security Advisories · Jan 17, 2026
- ELSA-2026-0453 Important: kernel security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jan 12, 2026
- ELSA-2026-0445 Moderate: kernel security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jan 12, 2026