CVE-2026-74616: xdp: reject clones that overrun skb_shared_info tailroom

mediumCVSS 6CVE-2026-74616

CSIRTS triage

vendor: Linux product: Linux Kernel Memory corruption

What: XDP subsystem does not properly reject clones that exceed skb_shared_info tailroom, allowing buffer overruns.
Who is affected: Systems deploying XDP programs on vulnerable kernel versions.
Urgency: Medium urgency; not currently exploited but buffer overruns can lead to memory corruption.
Action: Apply kernel patch to reject XDP clones that overrun skb_shared_info tailroom.

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 6
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74616

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-2026-746160.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74616	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 xdp

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-2026-74710: In the Linux kernel, the following vulnerability has been resolved: xsk: require at least 16 b…nvd · 2026-08-22
highCVE-2026-74684: In the Linux kernel, the following vulnerability has been resolved: net: tap: set skb->dev bef…nvd · 2026-08-22
criticalCVE-2026-74665: In the Linux kernel, the following vulnerability has been resolved: net: fix skb length accoun…nvd · 2026-08-22
criticalCVE-2026-74616: In the Linux kernel, the following vulnerability has been resolved: xdp: reject clones that ov…nvd · 2026-08-22
criticalCVE-2026-74612: In the Linux kernel, the following vulnerability has been resolved: veth: fix skb length accou…nvd · 2026-08-22
highCVE-2026-74575: In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Prevent XDoma…nvd · 2026-08-15