CVE-2026-23435 — Signal Handler Race Condition in Linux
Severity
—N/A
No vectorEPSS
0.0%
top 94.14%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedApr 3
Description
In the Linux kernel, the following vulnerability has been resolved:
perf/x86: Move event pointer setup earlier in x86_pmu_enable()
A production AMD EPYC system crashed with a NULL pointer dereference
in the PMU NMI handler:
BUG: kernel NULL pointer dereference, address: 0000000000000198
RIP: x86_perf_event_update+0xc/0xa0
Call Trace:
amd_pmu_v2_handle_irq+0x1a6/0x390
perf_event_nmi_handler+0x24/0x40
The faulting instruction is `cmpq $0x0, 0x198(%rdi)` with RDI=0,
corresponding to the `if (u…
Affected Packages3 packages
▶CVEListV5linux/linux6b089028bff1f2ff9e0c62b8f1faca1a620e5d6e — 886fa869153917d902784098922defa20c3a2fe5+4
🔴Vulnerability Details
2OSV▶
CVE-2026-23435: In the Linux kernel, the following vulnerability has been resolved: perf/x86: Move event pointer setup earlier in x86_pmu_enable() A production AMD EP↗2026-04-03
GHSA▶
GHSA-4rrh-p933-rf74: In the Linux kernel, the following vulnerability has been resolved:
perf/x86: Move event pointer setup earlier in x86_pmu_enable()
A production AMD↗2026-04-03