CVE-2026-53154: mm/hugetlb: restore reservation on error in hugetlb folio copy paths

mediumCVSS 5.5CVE-2026-53154

CSIRTS triage

Other

What: The vulnerability involves restoring reservation on error in hugetlb folio copy paths.
Who is affected: Deployments using hugetlb memory management.
Urgency: Remediation is medium urgency due to the medium severity rating.
Action: Apply the patch to address the error handling in hugetlb.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53154

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-2026-531540.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53154	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownexploitedUSN-8728-1: Linux kernel (GCP) vulnerabilitiesubuntu
unknownexploitedUSN-8727-1: Linux kernel (OEM) vulnerabilitiesubuntu
unknownexploitedUSN-8726-1: Linux kernel vulnerabilitiesubuntu

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.

lowCVE-2026-80893: mm/hugetlb: fix swap entry corruption when clearing uffd-wp at fork()msrc · 2026-09-08
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