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CVE-2026-45446: Incorrect Tag Processing for Empty Messages in AES-GCM-SIV and AES-SIV modes

mediumCVSS 4.8CVE-2026-45446

CSIRTS triage

vendor: Linuxproduct: AES-GCM-SIV and AES-SIVOther
What
Incorrect tag processing for empty messages in AES-GCM-SIV and AES-SIV modes.
Who is affected
Deployments using these AES modes in Linux.
Urgency
Remediation is necessary due to the medium severity rating.
Action
Apply the relevant patches for the affected AES modes.

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
medium — CVSS 4.8
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45446

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-2026-45446coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

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