CVE-2026-98546Medium· 4.7▾ SunlitA flaw was found in the Linux kernel's ARM64 architecture support. When user-space access to performance monitoring counters is enabled, write traps for a write-only performance register are improperly configured during hypervisor initiali…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 25.9 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 20.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
Last analysed / modified upstream
0.2%
— → 4.7
none → medium
A flaw was found in the Linux kernel's ARM64 architecture support. When user-space access to performance monitoring counters is enabled, write traps for a write-only performance register are improperly configured during hypervisor initialization. A local user can exploit this vulnerability by issuing a write to this register, triggering an unhandled hypervisor exception that leads to a Denial of Service (DoS) through a host system crash.
kernel: arm64/boot: Disable trapping of PMZR_EL0 writes to EL2 — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.
Not affected:
Refer to the advisory for fix availability.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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