CVE-2026-98469KVM: arm64: Fix AArch32 DBGBXVR<n> handling
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from 3ce9f3357e9e099f02feaa002769eb99ef1138cd before 8530a05b304d312fe7dfbc5df7d3e87cc31b256a; from 3ce9f3357e9e099f02feaa002769eb99ef1138cd before af6813d16ace2765011ca1c567be86ade1d1ee8e; from 3ce9f3357e9e099f02feaa002769eb99ef1138cd before 6b1bca1b1ab77f60a62087337bfe6e2f0efb9e6d | CNA record |
References
- https://git.kernel.org/stable/c/8530a05b304d312fe7dfbc5df7d3e87cc31b256a
- https://git.kernel.org/stable/c/af6813d16ace2765011ca1c567be86ade1d1ee8e
- https://git.kernel.org/stable/c/6b1bca1b1ab77f60a62087337bfe6e2f0efb9e6d
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.