Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3ce9f3357e9e099f02feaa002769eb99ef1138cd before 8530a05b304d312fe7dfbc5df7d3e87cc31b256a; affected 3ce9f3357e9e099f02feaa002769eb99ef1138cd before af6813d16ace2765011ca1c567be86ade1d1ee8e; affected 3ce9f3357e9e099f02feaa002769eb99ef1138cd before 6b1bca1b1ab77f60a62087337bfe6e2f0efb9e6d |
| Linux / Linux | affected 6.14; unaffected 0 before 6.14; unaffected 6.18.55 through 6.18.*; unaffected 7.2.9 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.