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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2026-98469

KVM: arm64: Fix AArch32 DBGBXVR<n> handling

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 3ce9f3357e9e099f02feaa002769eb99ef1138cd to < 8530a05b304d312fe7dfbc5df7d3e87cc31b256aaffected
  • 3ce9f3357e9e099f02feaa002769eb99ef1138cd to < af6813d16ace2765011ca1c567be86ade1d1ee8eaffected
  • 3ce9f3357e9e099f02feaa002769eb99ef1138cd to < 6b1bca1b1ab77f60a62087337bfe6e2f0efb9e6daffected

Linux Linux

Default version status: affected

  • 6.14affected
  • 0 to < 6.14unaffected
  • 6.18.55 to ≤ 6.18.*unaffected
  • 7.2.9 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References