CVE-2026-98469

HighCVSS 7.1/10Last modified Oct 24, 2026

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.

Metrics

CVSS 3.1 7.1/10CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

No affected versions have been published.

Timeline

Published
Oct 18, 2026
Last modified
Oct 24, 2026
NVD status
Received

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CVE-2026-98469: High severity, CVSS 7.1 | Vulnix