CVE-2026-52931: batman-adv: tp_meter: avoid use of uninit sender vars

criticalCVSS 9.8CVE-2026-52931

CSIRTS triage

vendor: null product: nullOther

What: Avoid using uninitialized sender variables in batman-adv to prevent issues.
Who is affected: Users of batman-adv are affected by this vulnerability.
Urgency: Critical urgency for remediation due to the high severity of potential exploitation.
Action: Implement the fix to avoid using uninitialized sender variables.

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: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-52931

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-2026-529310.40% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 32% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-52931	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

high[UPDATE] [high] Linux Kernel: Multiple vulnerabilitiescert-bund
unknownMultiple vulnerabilities in Microsoft Azure Linux (June 29, 2026)cert-fr-avis

Recent advisories for batman-adv

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.

criticalCVE-2026-52922: batman-adv: dat: handle forward allocation errormsrc · 2026-06-09
mediumCVE-2026-52916: batman-adv: frag: disallow unicast fragment in fragmentmsrc · 2026-06-09
criticalCVE-2026-52934: batman-adv: tvlv: reject oversized TVLV packetsmsrc · 2026-06-09
highCVE-2026-52926: batman-adv: clear current gateway during teardownmsrc · 2026-06-09
criticalCVE-2026-52913: batman-adv: v: stop OGMv2 on disabled interfacemsrc · 2026-06-09
criticalCVE-2026-52919: batman-adv: fix tp_meter counter underflow during shutdownmsrc · 2026-06-09