PT-2025-30861 · Linux+1 · Linux Kernel+1
Published
2025-06-27
·
Updated
2025-11-19
·
CVE-2025-38447
CVSS v3.1
7.1
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains an issue in the mm/rmap module related to out-of-bounds page table access during batched unmap operations within the
try to unmap one() function. This occurs when handling large folios with PTE mappings that are not fully contained within a single page table. The vulnerability is triggered by the batched unmap logic, potentially allowing a read past the end of a PTE table. The issue was identified by David and addressed by refactoring the logic into a new helper function, folio unmap pte batch(), which correctly calculates a safe batch size based on VMA and PMD boundaries.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel