Use-after-free in Linux kernel - CVE-2026-98435

Vulnerability details

The vulnerability allows a local user to potentially cause a denial of service through a kernel crash.

The vulnerability exists due to use-after-free in the Linux kernel Altera EDAC driver's altr_portb_setup() function when an error during port B setup causes device-managed resource cleanup to reference an embedded device after its containing allocation has been freed. A local user can exercise the affected setup error path to potentially cause a kernel crash.

Affected software

How to mitigate CVE-2026-98435

External References

• https://git.kernel.org/stable/c/2cf03ada03532bfb42f06fbf01d9e2a99e6011d7
• https://git.kernel.org/stable/c/8325ecf3f16d764a0e0ba42c95b63f08e38710a8
• https://git.kernel.org/stable/c/9868f5c077dfe0b606331f2e782484f91a5789a5
• https://git.kernel.org/stable/c/dc4797c909b6cacb1bb24449e6c57d50a14d73bf

Related Security Bulletins

• Use-after-free in Linux kernel edac driver