CVE-2026-89593
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
hugetlb: only adjust reservation during unmapping if mapcount is 0
In the Linux kernel, the following vulnerability has been resolved: hugetlb: only adjust reservation during unmapping if mapcount is 0 Since df7a6d1f6405, __unmap_hugepage_range can adjust reservations. In the case of folio mapped in both a parent and a child, if the parent unmaps the range first, the reservation adjustment will result in an underflow of the reserved count. Once the child unmaps the range, the count is restored. Change __unmap_hugepage_range() to check the mapcount before adjusting the reservation.
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) |
|---|---|---|---|---|---|
| df7a6d1f64056aec572162c5d35ed9ff86ece6f3 | affected | git | b0b1b9ca80b795ed2223e76dd787db7067121fb9 | Unavailable | None listed |
| df7a6d1f64056aec572162c5d35ed9ff86ece6f3 | affected | git | a3c65af20cceb7f997847727636b4017326f845d | Unavailable | None listed |
| df7a6d1f64056aec572162c5d35ed9ff86ece6f3 | affected | git | 0f001491e5a2ec69aa9d5dd6b799e5742245f9ea | Unavailable | None listed |
| df7a6d1f64056aec572162c5d35ed9ff86ece6f3 | affected | git | 5120b1e048d48596ffaec1a8412012a91adba73b | 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) |
|---|---|---|---|---|---|
| 6.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.9 | Unavailable | None listed |
| 6.12.110 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.50 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.4 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |