SB20260919158 - Memory corruption in Linux kernel stmicro stmmac driver
Published: September 19, 2026
Security Bulletin ID
SB20260919158
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory corruption (CVE-ID: CVE-2026-90059)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper packet-header alignment in the stmmac RX path when processing received network packets. A remote attacker can send an ICMP echo request to cause a denial of service.
The issue affects ARM32 systems where NET_IP_ALIGN is 2.
Remediation
Install update from vendor's website.