SB20260812223 - NULL pointer dereference in Linux kernel mediatek mt76 driver
Published: August 12, 2026
Security Bulletin ID
SB20260812223
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-2026-68309)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/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 a NULL pointer dereference in mt76_connac_mcu_uni_bss_he_tlv() when processing HE BSS TLV data. A local user can trigger the vulnerable code path to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/2afc2d5098866518a5c446a2e647b1b3f43daaf4
- https://git.kernel.org/stable/c/2c1fb2335f5e3afb34f91bc07ecb63517c328090
- https://git.kernel.org/stable/c/8709c66e665a2a09192853d4f3d0fb4bd0f76403
- https://git.kernel.org/stable/c/b09508dd7bc4a8948ea00603041a918c09788502
- https://git.kernel.org/stable/c/c058786b09cfab080125bc3ee7928a181dcbd37a