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[ CVE-2026-31431 · Published 22 Apr 2026 ]

Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability

Exploited · CISA KEV CVSS 7.8 EPSS 3%Fix available

[ Why it matters ]Priority signals

  • Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2026-05-01

[ Description ]Official description

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.

CISA: Linux Kernel contains an incorrect resource transfer between spheres vulnerability that could allow for privilege escalation.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 15 May 2026): "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

[ References ]References