CVE-2026-43396 drm/xe/sync: Fix user fence leak on alloc failure

What is CVE-2026-43396?

CVE-2026-43396 is a medium-severity memory corruption vulnerability in Linux kernel, published on 8 May 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:

drm/xe/sync: Fix user fence leak on alloc failure

When dma_fence_chain_alloc() fails, properly release the user fence reference to prevent a memory leak.

(cherry picked from commit a5d5634cde48a9fcd68c8504aa07f89f175074a0)

Weakness: CWE-401

Which versions are affected by CVE-2026-43396?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-43396?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-43396 being exploited?

There is no known exploitation of CVE-2026-43396 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-2026-43396, DEBIAN-CVE-2026-43396, GHSA-j5jq-r673-59h3, UBUNTU-CVE-2026-43396.