CVE-2026-89593
- Source
- https://cve.org/CVERecord?id=CVE-2026-89593
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89593.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-89593
- Downstream
- Published
- 2026-09-11T19:44:56Z
- Modified
- 2026-09-14T03:46:18Z
- Severity
-
- 7.1 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H CVSS Calculator
- Summary
- hugetlb: only adjust reservation during unmapping if mapcount is 0
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89593.json" }- References
-
- https://git.kernel.org/stable/c/0f001491e5a2ec69aa9d5dd6b799e5742245f9ea
- https://git.kernel.org/stable/c/5120b1e048d48596ffaec1a8412012a91adba73b
- https://git.kernel.org/stable/c/a3c65af20cceb7f997847727636b4017326f845d
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89593.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-89593
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git