CVE-2026-31436 dmaengine: idxd: fix possible wrong descriptor completion in llist_abort_desc()
A logic error in the Intel DSA driver causes wrong descriptor completion, leading to NULL pointer dereferences and potential system crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-31436?
CVE-2026-31436 is a critical vulnerability in Linux kernel, published on 22 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
dmaengine: idxd: fix possible wrong descriptor completion in llist_abort_desc()
At the end of this function, d is the traversal cursor of flist, but the code completes found instead. This can lead to issues such as NULL pointer dereferences, double completion, or descriptor leaks.
Fix this by completing d instead of found in the final list_for_each_entry_safe() loop.
Which versions are affected by CVE-2026-31436?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-31436?
Apply the vendor's patch.
Is CVE-2026-31436 being exploited?
There is no known exploitation of CVE-2026-31436 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-31436, DEBIAN-CVE-2026-31436, GHSA-j9j9-688w-mvpv, ROOT-OS-DEBIAN-13-CVE-2026-31436, ROOT-OS-UBUNTU-2404-CVE-2026-31436, UBUNTU-CVE-2026-31436.