Out-of-bounds read in Linux kernel - CVE-2026-99236

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Main Vulnerability Database Vulnerabilities #VU158722

Out-of-bounds read in Linux kernel - CVE-2026-99236

Published: November 3, 2026


Vulnerability identifier: #VU158722
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-99236
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to potentially disclose sensitive kernel information, compromise kernel integrity, or cause a denial of service.

The vulnerability exists due to an out-of-bounds read in predicate_parse() in kernel/trace/trace_events_filter.c when processing incomplete event filter expressions ending with logical operators, optionally followed by unary negations. A local user can submit a crafted filter through PERF_EVENT_IOC_SET_FILTER on a self-targeted perf tracepoint counting event to trigger a read of prog[-1] and potentially copy an out-of-bounds word into a branch target, which may expose kernel memory, compromise kernel integrity, or cause a kernel crash.


Affected software

Linux kernel
openEuler
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-headers
kernel-source
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python3-perf
python3-perf-debuginfo

How to mitigate CVE-2026-99236

Install security update from vendor's repository.

kernel - update to 5.10.0-341.0.0.242
bpftool - update to 5.10.0-341.0.0.242
bpftool-debuginfo - update to 5.10.0-341.0.0.242
kernel-debuginfo - update to 5.10.0-341.0.0.242
kernel-debugsource - update to 5.10.0-341.0.0.242
kernel-devel - update to 5.10.0-341.0.0.242
kernel-headers - update to 5.10.0-341.0.0.242
kernel-source - update to 5.10.0-341.0.0.242
kernel-tools - update to 5.10.0-341.0.0.242
kernel-tools-debuginfo - update to 5.10.0-341.0.0.242
kernel-tools-devel - update to 5.10.0-341.0.0.242
perf - update to 5.10.0-341.0.0.242
perf-debuginfo - update to 5.10.0-341.0.0.242
python3-perf - update to 5.10.0-341.0.0.242
python3-perf-debuginfo - update to 5.10.0-341.0.0.242

External References

Related Security Bulletins