CVE-2026-80893: mm/hugetlb: fix swap entry corruption when clearing uffd-wp at fork()

lowCVSS 2.5CVE-2026-80893

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: low — CVSS 2.5
Published: 2026-09-08
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80893

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-2026-808930.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-80893	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownCVE-2026-80893: In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix swap entry…nvd

Recent advisories for mm/hugetlb

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-2026-80893: In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix swap entry…nvd · 2026-09-04
highCVE-2026-74518: In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix list corru…nvd · 2026-08-15
highCVE-2026-72213: In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix hugetlb cg…nvd · 2026-08-15
highCVE-2026-74518: mm/hugetlb: fix list corruption in allocate_file_region_entries()msrc · 2026-08-11
mediumCVE-2026-53154: mm/hugetlb: restore reservation on error in hugetlb folio copy pathsmsrc · 2026-06-09