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CVE-2026-98713

KVM: arm64: Apply the fine-grained UNDEFs without FEAT_FGT

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

KVM: arm64: Apply the fine-grained UNDEFs without FEAT_FGT

FGUs don't actually require hardware support, so don't gate fgt trap
config insertion on FGT. This is the only action required to allow FGUs
always, as kvm_calculate_traps() already computes the FGU bits with or
without FEAT_FGT.

This also fixes a spurious WARN when a TLBI OS is run on a guest in vEL1
without FEAT_TLBIOS on non FEAT_FGT hardware. In this configuration the
course-grained HCR_EL2.TTLBOS trap reaches the handler handle_tlbi_el1(),
which expects an EL1 TLBI only from vEL2. With FGUs enabled the UNDEF
will be injected without needing the specific handler.

[oliver: Take Wei-Lin's suggested changelog]
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f
Version < 2f4a15c52a552c5244ec27f4ca8bda855594f918
Status affected
Version f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f
Version < 1113374a17d7f7d16b02ee0bbd9b1e7a60cbb087
Status affected
Version f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f
Version < af3300b3a6bace925a496f3520e171c07b999c72
Status affected
Version f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f
Version < 4bdd2b3a708c1feb701cb8b62feb8ad2fd77bb07
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.9
Status affected
Version 0
Version < 6.9
Status unaffected
Version <= 6.12.*
Version 6.12.113
Status unaffected
Version <= 6.18.*
Version 6.18.56
Status unaffected
Version <= 7.2.*
Version 7.2.10
Status unaffected
Version <= *
Version 7.3
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 0.17% 0.057
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/2f4a15c52a552c5244ec27f4ca8bda855594f918
https://git.kernel.org/stable/c/1113374a17d7f7d16b02ee0bbd9b1e7a60cbb087
https://git.kernel.org/stable/c/af3300b3a6bace925a496f3520e171c07b999c72
https://git.kernel.org/stable/c/4bdd2b3a708c1feb701cb8b62feb8ad2fd77bb07