CVE Catalog

CVE-2026-72180

Low risk· EPSS 10%
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.20%

10th percentile - higher than 10% of all known CVEs

Summary

In the Linux kernel's mm/huge_memory subsystem, change_non_present_huge_pmd() rewrites a writable device-private PMD swap entry without carrying pmd_swp_uffd_wp. The fix adds carrying this bit to preserve the UFFD_WP marking, similar to change_softleaf_pte() and copy_huge_pmd().

Risk Assessment

Missing the bit can cause the UFFD_WP trap to be bypassed on swap-in, potentially leading to unauthorized memory access.

Recommendation

Install the kernel patch to ensure proper carrying of pmd_swp_uffd_wp during PMD downgrade.

Other vulnerabilities in Linux kernel

See all
Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: mm/huge_memory: preserve pmd_swp_uffd_wp on device-private PMD downgrade change_non_present_huge_pmd() rewrites a writable device-private PMD swap entry into a readable one without carrying pmd_swp_uffd_wp() across. The PTE-level change_softleaf_pte() does this correctly; mirror that here, matching what copy_huge_pmd() does for the fork path. Without the carry, a plain mprotect() over a UFFD_WP-marked device-private THP strips the bit and the trap is bypassed on swap-in.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS