CVE-2026-74611: tls: rx: restore msg_iter before TLS 1.3 optimistic retry

highCVSS 8.2CVE-2026-74611

CSIRTS triage

vendor: Linux product: Linux Kernel Denial of service

What: TLS 1.3 optimistic retry does not properly restore the message iterator, causing data corruption or kernel crash.
Who is affected: Systems using in-kernel TLS 1.3 with optimistic retry enabled.
Urgency: High priority; CVSS 8.2 indicates significant impact; causes potential kernel instability.
Action: Apply kernel patches addressing CVE-2026-74611 when available through distribution updates.

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 8.2
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74611

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.

Low exploitation riskCVE-2026-746110.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74611	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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