{"id":"CVE-2026-98469","title":"KVM: arm64: Fix AArch32 DBGBXVR<n> handling","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Fix AArch32 DBGBXVR<n> handling\n\nThe consolidation of the breakpoint and watchpoint register accessors\nswitched DBGBXVR<n> from trap_bvr() to trap_dbg_wb_re…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 3ce9f3357e9e099f02feaa002769eb99ef1138cd < 8530a05b304d312fe7dfbc5df7d3e87cc31b256a","Linux >= 3ce9f3357e9e099f02feaa002769eb99ef1138cd < af6813d16ace2765011ca1c567be86ade1d1ee8e","Linux >= 3ce9f3357e9e099f02feaa002769eb99ef1138cd < 6b1bca1b1ab77f60a62087337bfe6e2f0efb9e6d","Linux 6.14"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:15:22.065Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98469","references":[{"url":"https://git.kernel.org/stable/c/8530a05b304d312fe7dfbc5df7d3e87cc31b256a"},{"url":"https://git.kernel.org/stable/c/af6813d16ace2765011ca1c567be86ade1d1ee8e"},{"url":"https://git.kernel.org/stable/c/6b1bca1b1ab77f60a62087337bfe6e2f0efb9e6d"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.299Z","slug":"CVE-2026-98469","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Fix AArch32 DBGBXVR<n> handling\n\nThe consolidation of the breakpoint and watchpoint register accessors\nswitched DBGBXVR<n> from trap_bvr() to trap_dbg_wb_reg(). The latter\nselects backing storage with demux_wb_reg(), which only handles Op2 values\n4 through 7. Since DBGBXVR<n> uses Op2 1, an AArch32 guest access hits\nKVM_BUG_ON() and marks the VM dead.\n\nDBGBXVR<n> aliases DBGBVR<n>_EL1[63:32], and its AA32(HI) descriptor\nalready selects the upper half. Map Op2 1 to dbg_bvr[] alongside Op2 4,\nrestoring the pre-regression behavior.\n\n## Affected\n\n- `Linux >= 3ce9f3357e9e099f02feaa002769eb99ef1138cd < 8530a05b304d312fe7dfbc5df7d3e87cc31b256a`\n- `Linux >= 3ce9f3357e9e099f02feaa002769eb99ef1138cd < af6813d16ace2765011ca1c567be86ade1d1ee8e`\n- `Linux >= 3ce9f3357e9e099f02feaa002769eb99ef1138cd < 6b1bca1b1ab77f60a62087337bfe6e2f0efb9e6d`\n- `Linux 6.14`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}