SB20260918268 - Out-of-bounds read in Linux kernel ath ath11k driver
Published: September 18, 2026
Security Bulletin ID
SB20260918268
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) Out-of-bounds read (CVE-ID: CVE-2026-90407)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to read out-of-bounds memory.
The vulnerability exists due to an out-of-bounds read in ath11k_wmi_process_csa_switch_count_event() when processing a firmware CSA switch count event. A local user can provide a crafted firmware event with an unchecked num_vdevs value to read out-of-bounds memory.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0364926fb4bfb5b798e5fe2785b3023b4f767327
- https://git.kernel.org/stable/c/208d7fdb85976a737a715b81d54efaff6703880c
- https://git.kernel.org/stable/c/5de2b8c53714ad58f2fda118cd29ebbe31b38665
- https://git.kernel.org/stable/c/d6625dc5f1fe42cd81b8c57a1f5317afb9b410ce
- https://git.kernel.org/stable/c/f760b7d7e43584d2fa9bffcec1a04e502609f827