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CVE-2026-31436

Linux Kernel NULL pointer dereference

9.8 CRITICALEPSS 0.67%
  1. Published22 Apr 2026

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 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Linux Kernel≥ 6.13 < 6.18.21 · ≥ 6.19 < 6.19.11 · ≥ 6.8 < 6.12.80 · 7.0

Remediation

Fixed in
Linux Kernel≥ 6.18.21

References

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Frequently asked

Is CVE-2026-31436 being actively exploited?

CVE-2026-31436 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.67%.

How severe is CVE-2026-31436?

CVE-2026-31436 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.67% probability of exploitation.

Which products are affected by CVE-2026-31436?

Affected products include Linux Kernel.

How do I fix CVE-2026-31436?

Upgrade affected software to a fixed version, for example Linux Kernel 6.18.21 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.