CVE-2026-98469
Received Received - Intake

KVM: arm64 DBGBXVR Register Handling Fix

Publication date: 2026-10-18

Last updated on: 2026-10-18

Assigner: kernel.org

Description
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.

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Meta Information

Published
2026-10-18
Last Modified
2026-10-18
Generated
2026-10-18
EPSS Evaluated
N/A
NVD
CVE-2026-98469
EUVD
EUVD-2026-103709

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
Linux Linux 3ce9f3357e9e099f02feaa002769eb99ef1138cd
Linux Linux 3ce9f3357e9e099f02feaa002769eb99ef1138cd
Linux Linux 3ce9f3357e9e099f02feaa002769eb99ef1138cd
Linux Linux 6.14

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CWE ID Description
CWE-UNKNOWN

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