CVE-2026-46328 apparmor: fix rlimit for posix cpu timers

What is CVE-2026-46328?

CVE-2026-46328 is a high-severity vulnerability in Linux kernel, published on 9 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

apparmor: fix rlimit for posix cpu timers

Posix cpu timers requires an additional step beyond setting the rlimit. Refactor the code so its clear when what code is setting the limit and conditionally update the posix cpu timers when appropriate.

Which versions are affected by CVE-2026-46328?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-46328?

Apply the vendor's patch.

Is CVE-2026-46328 being exploited?

There is no known exploitation of CVE-2026-46328 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2026-46328, DEBIAN-CVE-2026-46328, GHSA-2v6r-qcvm-x943, ROOT-OS-UBUNTU-2204-CVE-2026-46328, ROOT-OS-UBUNTU-2404-CVE-2026-46328, UBUNTU-CVE-2026-46328.