CVE intelligenceCISA KEV

CVE-2026-31431

Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability

Published Apr 22, 2026Sources checked Sep 12, 2026

7.8HIGHCVSS out of 10

What this means

Actively exploited

CISA lists CVE-2026-31431 in its Known Exploited Vulnerabilities catalog, which means exploitation has been observed. The entry applies to Linux Kernel.

"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CISA KEVListedObserved exploitation

EPSS99.9%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-31431?

In the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating out-of-place This mostly reverts commit 72548b093ee3 except for the copying of the associated data. There is no benefit in operating in-place in algif_aead since the source and destination come from different mappings. Get rid of all the complexity added for in-place operation and just copy the AD directly.