SB20260918197 - Improper initialization in Linux kernel bpf
Published: September 18, 2026
Security Bulletin ID
SB20260918197
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) Improper initialization (CVE-ID: CVE-2026-92515)
CWE-ID: CWE-665 - Improper Initialization
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 remote attacker to trigger a kernel warning.
The vulnerability exists due to improper initialization of uniqueness-tracking state in btf_find_struct_field() when processing crafted BTF containing duplicate unique special fields across nested structs. A remote attacker can submit crafted BTF to trigger a kernel warning.
The warning can be triggered before map-creation capability checks.
Remediation
Install update from vendor's website.