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CVE-2026-31431: crypto: algif_aead - Revert to operating out-of-place

highknown exploitedpublic exploitCVSS 7.8CVE-2026-31431
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.

CSIRTS triage

vendor: Linuxproduct: Linux kernel (crypto: algif_aead)Memory corruption
What
Out-of-place operation in the algif_aead crypto module causes memory corruption.
Who is affected
Systems running affected Linux kernel versions with the algif_aead module enabled.
Urgency
High; actively exploited with CVSS 7.8 indicates significant real-world risk.
Action
Apply kernel security updates from your Linux distribution as soon as available.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7.8
Published
2026-08-06
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-31431

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-31431coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for crypto

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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