SB20260918173 - NULL pointer dereference in Linux kernel ipack devices driver
Published: September 18, 2026
Security Bulletin ID
SB20260918173
CSH 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 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-93050)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to null pointer dereference in ipoctal_write_tty() when writing to a tty whose transmit buffer has been freed during device removal. A local user can write to an open tty after device removal to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1a3258e105f711538201bdd2ac2a05b11554eabc
- https://git.kernel.org/stable/c/4a6518be316029650301f2a5e8f0def229b895d9
- https://git.kernel.org/stable/c/a4613140f01bd0fb9980e2746ed9aaa65a29b5d6
- https://git.kernel.org/stable/c/ab5f5b27a340004b92252c6a5f23bf1c6cf3b02a
- https://git.kernel.org/stable/c/b6b5d64cb161a28347d64dc3168a636c4abb68d5
- https://git.kernel.org/stable/c/c92ef8fd834521f0b788e0511976c689fe57c63c