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Vulnerability record · CVE-2026-31436 · published 22 April 2026

CVE-2026-31436: Linux kernel null pointer dereference vulnerability

Linux · Linux Kernel

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.

9.8 CVSS 3.1 Critical EPSS 0.67% · top 49.9% CWE-476 · NULL pointer dereference
9.8CVSS 3.1 base score
0.67%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/0e4f43779d550e559be13a5cdb763bad92c4cc99 Patch
https://git.kernel.org/stable/c/82656e8daf8de00935ae91b91bed43f4d6e0d644 Patch
https://git.kernel.org/stable/c/e1c9866173c5f8521f2d0768547a01508cb9ff27 Patch
https://git.kernel.org/stable/c/e21da2ad8844585040fe4b82be1ad2fe99d40074 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-31436), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.