UNKNOWN NVD
CVE-2026-89593
In the Linux kernel, the following vulnerability has been resolved: hugetlb: only adjust reservation during unmapping if mapcount is 0 Since df7a6d1f6405, __u
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.
References
- https://git.kernel.org/stable/c/0f001491e5a2ec69aa9d5dd6b799e5742245f9ea
- https://git.kernel.org/stable/c/5120b1e048d48596ffaec1a8412012a91adba73b
- https://git.kernel.org/stable/c/a3c65af20cceb7f997847727636b4017326f845d
This unknown severity vulnerability was published on 2026-09-11 via NVD.
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