SB2026091940 - Type Confusion in Linux kernel bpf
Published: September 19, 2026
Security Bulletin ID
SB2026091940
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Type Confusion (CVE-ID: CVE-2026-90177)
CWE-ID: CWE-843 - Type confusion
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to bypass pointer type verification.
The vulnerability exists due to improper pointer type validation in the BPF verifier's atomic read-modify-write verification when verifying atomic read-modify-write instructions. A local user can route an atomic read-modify-write instruction through paths with incompatible destination pointer types to bypass pointer type verification.
Remediation
Install update from vendor's website.