SB2026110313 - Out-of-bounds read in Linux kernel test.d filter

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Main Vulnerability Database SB2026110313

SB2026110313 - Out-of-bounds read in Linux kernel test.d filter

Published: November 3, 2026

Security Bulletin ID SB2026110313
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-99236)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 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]


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.


Remediation

Install update from vendor's website.

References