SB20260912374 - Unchecked Return Value in Linux kernel net phy driver
Published: September 12, 2026
Security Bulletin ID
SB20260912374
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Unchecked Return Value (CVE-ID: CVE-2026-80993)
CWE-ID: CWE-252 - Unchecked Return Value
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a kernel panic.
The vulnerability exists due to improper validation of an error pointer in phylink_inband_caps() when mac_select_pcs() returns an error pointer. A local user can trigger the affected code path to cause a kernel panic.
Remediation
Install update from vendor's website.