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CVE-2026-80607: tracing/probes: Remove WARN_ON_ONCE from parse_btf_arg

criticalCVSS 9.8CVE-2026-80607

CSIRTS triage

vendor: Linuxproduct: Linux KernelDenial of service
What
The tracing probes subsystem contains a WARN_ON_ONCE call in parse_btf_arg that can be triggered to cause kernel panic.
Who is affected
Systems running Linux kernel with tracing and probes functionality enabled, particularly if unprivileged user namespace access is allowed.
Urgency
Critical severity (CVSS 9.8); immediate patching required as this can cause denial of service through kernel panic.
Action
Apply kernel security patch addressing CVE-2026-80607 immediately when available from your distribution.

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
critical — CVSS 9.8
Published
2026-08-11
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80607

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-2026-80607coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for tracing/probes

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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