SB20261023197 - Out-of-bounds read in Linux kernel sched

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20261023197

SB20261023197 - Out-of-bounds read in Linux kernel sched

Published: October 23, 2026

Security Bulletin ID SB20261023197
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

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-2026-98969)

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

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to disclose kernel memory.

The vulnerability exists due to an out-of-bounds read in em_text_change() in net/sched/em_text.c when processing a netlink text ematch configuration with an unterminated algorithm name. A local user can supply a 16-byte algo array without a NUL terminator to cause the module-autoload path to read beyond the array and include adjacent memory contents in the usermode helper command line.

Exploitation requires CAP_NET_ADMIN in the target network namespace; obtaining this capability through unshare -Urn is sufficient.


Remediation

Install update from vendor's website.

References