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CVE-2026-98469

KVM: arm64: Fix AArch32 DBGBXVR<n> handling

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

KVM: arm64: Fix AArch32 DBGBXVR<n> handling

The consolidation of the breakpoint and watchpoint register accessors
switched DBGBXVR<n> from trap_bvr() to trap_dbg_wb_reg(). The latter
selects backing storage with demux_wb_reg(), which only handles Op2 values
4 through 7. Since DBGBXVR<n> uses Op2 1, an AArch32 guest access hits
KVM_BUG_ON() and marks the VM dead.

DBGBXVR<n> aliases DBGBVR<n>_EL1[63:32], and its AA32(HI) descriptor
already selects the upper half. Map Op2 1 to dbg_bvr[] alongside Op2 4,
restoring the pre-regression behavior.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 3ce9f3357e9e099f02feaa002769eb99ef1138cd
Version < 8530a05b304d312fe7dfbc5df7d3e87cc31b256a
Status affected
Version 3ce9f3357e9e099f02feaa002769eb99ef1138cd
Version < af6813d16ace2765011ca1c567be86ade1d1ee8e
Status affected
Version 3ce9f3357e9e099f02feaa002769eb99ef1138cd
Version < 6b1bca1b1ab77f60a62087337bfe6e2f0efb9e6d
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.14
Status affected
Version 0
Version < 6.14
Status unaffected
Version <= 6.18.*
Version 6.18.55
Status unaffected
Version <= 7.2.*
Version 7.2.9
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 0.2% 0.09
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/8530a05b304d312fe7dfbc5df7d3e87cc31b256a
https://git.kernel.org/stable/c/af6813d16ace2765011ca1c567be86ade1d1ee8e
https://git.kernel.org/stable/c/6b1bca1b1ab77f60a62087337bfe6e2f0efb9e6d