7.1

CVE-2026-89593

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version df7a6d1f64056aec572162c5d35ed9ff86ece6f3
Version < b0b1b9ca80b795ed2223e76dd787db7067121fb9
Status affected
Version df7a6d1f64056aec572162c5d35ed9ff86ece6f3
Version < a3c65af20cceb7f997847727636b4017326f845d
Status affected
Version df7a6d1f64056aec572162c5d35ed9ff86ece6f3
Version < 0f001491e5a2ec69aa9d5dd6b799e5742245f9ea
Status affected
Version df7a6d1f64056aec572162c5d35ed9ff86ece6f3
Version < 5120b1e048d48596ffaec1a8412012a91adba73b
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.9
Status affected
Version 0
Version < 6.9
Status unaffected
Version <= 6.12.*
Version 6.12.110
Status unaffected
Version <= 6.18.*
Version 6.18.50
Status unaffected
Version <= 7.2.*
Version 7.2.4
Status unaffected
Version <= *
Version 7.3-rc1
Status unaffected
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.024
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.1 1.8 5.2
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/a3c65af20cceb7f997847727636b4017326f845d
https://git.kernel.org/stable/c/0f001491e5a2ec69aa9d5dd6b799e5742245f9ea
https://git.kernel.org/stable/c/5120b1e048d48596ffaec1a8412012a91adba73b
https://git.kernel.org/stable/c/b0b1b9ca80b795ed2223e76dd787db7067121fb9