SB2026062540 - Incorrect Conversion between Numeric Types in Linux kernel s390 net

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Main Vulnerability Database SB2026062540

SB2026062540 - Incorrect Conversion between Numeric Types in Linux kernel s390 net

Published: June 25, 2026

Security Bulletin ID SB2026062540
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Incorrect Conversion between Numeric Types (CVE-ID: CVE-2026-53110)

CWE-ID: CWE-681 - Incorrect Conversion between Numeric Types

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause incorrect behavior in kernel BPF processing.

The vulnerability exists due to improper handling of integer extension in the s390 BPF JIT compiler when processing BPF program return values and kfunc arguments. A local user can trigger the JIT compilation of crafted BPF code to cause incorrect behavior in kernel BPF processing.

The issue affects s390 systems because the ABI requires zero extension for unsigned arguments and return values, but only sign extension was implemented.


Remediation

Install update from vendor's website.

References