CVE-2025-38085
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race
In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race huge_pmd_unshare() drops a reference on a page table that may have previously been shared across processes, potentially turning it into a normal page table used in another process in which unrelated VMAs can afterwards be installed. If this happens in the middle of a concurrent gup_fast(), gup_fast() could end up walking the page tables of another process. While I don't see any way in which that immediately leads to kernel memory corruption, it is really weird and unexpected. Fix it with an explicit broadcast IPI through tlb_remove_table_sync_one(), just like we do in khugepaged when removing page tables for a THP collapse.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 39dde65c9940c97fcd178a3d2b1c57ed8b7b68aa | affected | git | 952596b08c74e8fe9e2883d1dc8a8f54a37384ec | Unavailable | None listed |
| 39dde65c9940c97fcd178a3d2b1c57ed8b7b68aa | affected | git | a3d864c901a300c295692d129159fc3001a56185 | Unavailable | None listed |
| 39dde65c9940c97fcd178a3d2b1c57ed8b7b68aa | affected | git | b7754d3aa7bf9f62218d096c0c8f6c13698fac8b | Unavailable | None listed |
| 39dde65c9940c97fcd178a3d2b1c57ed8b7b68aa | affected | git | fe684290418ef9ef76630072086ee530b92f02b8 | Unavailable | None listed |
| 39dde65c9940c97fcd178a3d2b1c57ed8b7b68aa | affected | git | 034a52b5ef57c9c8225d94e9067f3390bb33922f | Unavailable | None listed |
| 39dde65c9940c97fcd178a3d2b1c57ed8b7b68aa | affected | git | a6bfeb97941a9187833b526bc6cc4ff5706d0ce9 | Unavailable | None listed |
| 39dde65c9940c97fcd178a3d2b1c57ed8b7b68aa | affected | git | 1013af4f585fccc4d3e5c5824d174de2257f7d6d | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.20 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.20 | Unavailable | None listed |
| 5.10.239 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.186 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.142 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.95 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.35 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.15.4 | unaffected | semver | Unavailable | 6.15.* | None listed |
| 6.16 | unaffected | original_commit_for_fix | Unavailable | * | None listed |