7.8

CVE-2026-89919

KVM: s390: keyop: use mmu_lock to read gmap->asce

In the Linux kernel, the following vulnerability has been resolved:

KVM: s390: keyop: use mmu_lock to read gmap->asce

Every other dat_* consumer in this file (kvm_s390_get_skeys,
set_skeys, get_cmma_bits, set_cmma_bits, MEM_CLR_CMMA,
kvm_s390_fixup_prefix, kvm_test_age_gfn, kvm_age_gfn) reads
kvm->arch.gmap->asce *inside* the mmu_lock read-side. keyop is the only
outlier.

gmap->asce is mutated under write_lock(mmu_lock) by gmap_set_limit()
and keyop might use a stale asce value for walking as KVM_S390_KEYOP
and KVM_S390_VM_MEM_LIMIT_SIZE can run concurrently. This can result
in memory corruption.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 0ee4ddc1647b8b3b9e7a94d798a1774a764428c1
Version < ae452b990e0544425f77045351c56e77158858e7
Status affected
Version 0ee4ddc1647b8b3b9e7a94d798a1774a764428c1
Version < da07a751efa4583385f9f0f47113549fe8871242
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 7.0
Status affected
Version 0
Version < 7.0
Status unaffected
Version <= 7.2.*
Version 7.2.5
Status unaffected
Version <= *
Version 7.3-rc1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.15% 0.049
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/ae452b990e0544425f77045351c56e77158858e7
https://git.kernel.org/stable/c/da07a751efa4583385f9f0f47113549fe8871242