KVM: arm64: Fix AArch32 DBGBXVR handling
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Fix AArch32 DBGBXVR handling The consolidation of the breakpoint and watchpoint register accessors switched DBGBXVR 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 uses Op2 1, an AArch32 guest access hits KVM_BUG_ON() and marks the VM dead. DBGBXVR aliases DBGBVR_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.
CVE-2026-98469
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98469
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3ce9f3357e9e099f02feaa002769eb99ef1138cd",
"lessThan": "8530a05b304d312fe7dfbc5df7d3e87cc31b256a",
"versionType": "git"
},
{
"status": "affected",
"version": "3ce9f3357e9e099f02feaa002769eb99ef1138cd",
"lessThan": "af6813d16ace2765011ca1c567be86ade1d1ee8e",
"versionType": "git"
},
{
"status": "affected",
"version": "3ce9f3357e9e099f02feaa002769eb99ef1138cd",
"lessThan": "6b1bca1b1ab77f60a62087337bfe6e2f0efb9e6d",
"versionType": "git"
}
],
"programFiles": [
"arch/arm64/kvm/sys_regs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/arm64/kvm/sys_regs.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98469
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #55598 · Revision 1
- Added to Heist Feed
- Publisher date