CVE-2026-46320: tap: free page on error paths in tap_get_user_xdp()

highCVSS 7.1CVE-2026-46320

CSIRTS triage

vendor: Linux product: tapOther

What: The tap_get_user_xdp() function frees a page on error paths.
Who is affected: Deployments using the tap networking feature in Linux.
Urgency: Remediation is high urgency due to the high severity and lack of exploitation status.
Action: Update to the latest version of the Linux kernel that includes the fix.

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 7.1
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-46320

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-2026-463200.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-46320	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 vulnerabilities enable denial of servicecert-bund
unknownDebian Linux Kernel Multiple Vulnerabilitieshkcert
unknownMultiple vulnerabilities in the Debian Linux kernel (June 26, 2026)cert-fr-avis
unknownDSA-6355-1 linux - security updatedebian

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.

mediumCVE-2026-52937: tap: fix stack info leak in tap_ioctl() SIOCGIFHWADDRmsrc · 2026-06-09