CVE-2026-74612: veth: fix skb length accounting after XDP frag adjustment

mediumCVSS 5.1CVE-2026-74612

CSIRTS triage

vendor: Linux product: Linux Kernel Memory corruption

What: Incorrect buffer length accounting in the veth driver when processing XDP fragment adjustments.
Who is affected: Virtual Ethernet deployments using XDP (eXpress Data Path) on vulnerable kernel versions.
Urgency: Medium urgency; not currently exploited but length accounting errors can cause buffer overflows or underflows.
Action: Apply kernel patch correcting skb length accounting in veth after XDP frag adjustment.

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: medium — CVSS 5.1
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74612

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-2026-746120.49% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74612	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

Recent advisories for veth

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-2026-74612: In the Linux kernel, the following vulnerability has been resolved: veth: fix skb length accou…nvd · 2026-08-22
criticalCVE-2026-74476: In the Linux kernel, the following vulnerability has been resolved: veth: convert frag_list sk…nvd · 2026-08-15
mediumCVE-2026-74476: veth: convert frag_list skbs before running XDPmsrc · 2026-08-11