CVE-2026-52937: tap: fix stack info leak in tap_ioctl() SIOCGIFHWADDR

mediumCVSS 5.5CVE-2026-52937

CSIRTS triage

Information disclosure

What: A stack information leak in tap_ioctl() SIOCGIFHWADDR in the tap component.
Who is affected: Deployments using the tap component.
Urgency: Remediation is necessary due to the medium severity rating of 5.5.
Action: Update the tap component to the latest version.

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-52937

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-2026-529370.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-52937	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

Recent advisories for tap

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.

highCVE-2026-46320: tap: free page on error paths in tap_get_user_xdp()msrc · 2026-06-09