SB20260216112 - Use of uninitialized resource in Linux kernel efivarfs
Published: February 16, 2026
Security Bulletin ID
SB20260216112
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 security vulnerability.
1) Use of uninitialized resource (CVE-ID: CVE-2026-23156)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to use of uninitialized resource within the efivar_entry_get() function in fs/efivarfs/vars.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/3960f1754664661a970dc9ebbab44ff93a0b4c42
- https://git.kernel.org/stable/c/4b22ec1685ce1fc0d862dcda3225d852fb107995
- https://git.kernel.org/stable/c/510a16f1c5c1690b33504052bc13fbc2772c23f8
- https://git.kernel.org/stable/c/89b8ca709eeeabcc11ebba64806677873a2787a8
- https://git.kernel.org/stable/c/e4e15a0a4403c96d9898d8398f0640421df9cb16