SB2026011449 - NULL pointer dereference in Linux kernel char driver
Published: January 14, 2026
Security Bulletin ID
SB2026011449
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) NULL pointer dereference (CVE-ID: CVE-2025-68797)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the ac_ioctl() function in drivers/char/applicom.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/0b8b353e09888bccee405e0dd6feafb60360f478
- https://git.kernel.org/stable/c/74883565c621eec6cd2e35fe6d27454cf2810c23
- https://git.kernel.org/stable/c/82d12088c297fa1cef670e1718b3d24f414c23f7
- https://git.kernel.org/stable/c/d285517429a75423789e6408653e57b6fdfc8e54
- https://git.kernel.org/stable/c/f83e3e9f89181b42f6076a115d767a7552c4a39e