CVE-2026-68302: amt: re-read skb header pointers after every pull

lowCVSS 3.3CVE-2026-68302

CSIRTS triage

vendor: Linux product: Linux kernel Memory corruption

What: AMT tunnel code does not re-read skb header pointers after pull operations, causing stale pointer access.
Who is affected: Systems running affected Linux kernel versions with Active Message Transport (AMT) tunnel support.
Urgency: Low priority; requires specific AMT tunnel configuration and does not directly enable remote execution.
Action: Apply kernel patch to re-validate header pointers after buffer operations.

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: low — CVSS 3.3
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68302

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-2026-683020.48% 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-2026-68302	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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Recent advisories for amt

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.

unknownCVE-2026-20734: Improper initialization in some firmware for some Intel(R) Active Management Technology (Intel…nvd · 2026-08-11
unknownCVE-2026-20715: Improper input validation in some firmware for some Intel(R) Active Management Technology (Int…nvd · 2026-08-11
unknownCVE-2026-20708: Insertion of sensitive information into log file in the subsystem for the Intel(R) AMT and Int…nvd · 2026-08-11
highCVE-2026-68152: amt: fix use-after-free in AMT delayed worksmsrc · 2026-08-11
criticalCVE-2026-68302: In the Linux kernel, the following vulnerability has been resolved: amt: re-read skb header po…nvd · 2026-08-10
highCVE-2026-68152: In the Linux kernel, the following vulnerability has been resolved: amt: fix use-after-free in…nvd · 2026-08-10