Improper Validation of Specified Quantity in Input in Linux kernel - CVE-2026-93271
Published: September 25, 2026
Vulnerability identifier: #VU152124
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93271
CWE-ID: CWE-1284
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper range validation in ath11k_dp_rx_h_rate() when processing HT, VHT, or HE frames with a reported MCS above the corresponding mac80211 rate-space maximum. A remote attacker can send a wireless frame with an out-of-range reported MCS value to cause a denial of service.
The affected frame decodes correctly despite its reported MCS value exceeding the corresponding mac80211 rate space.
Affected software
Linux kernel
How to mitigate CVE-2026-93271
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/12b09e478aa7459b7893a695ef77682202f2da83
- https://git.kernel.org/stable/c/2bb2a778a487305bd378db5fd5014fbdce4ada2c
- https://git.kernel.org/stable/c/6ad04c3e2ec54bf5ec72c81afdd66318a116c539
- https://git.kernel.org/stable/c/a0b3e6f9645d88f387c4fea546048a91952cd4cd
- https://git.kernel.org/stable/c/a6b951f79e66fc8bd93a537ff1040fbfb567c8bf
- https://git.kernel.org/stable/c/b77bfe6e59b98dff3ccfcf9b45fc27e3db498626
- https://git.kernel.org/stable/c/ccbd20f2168f581d90265da1a925b9b6472a0b05
- https://git.kernel.org/stable/c/fb7b9a7209f839c17c66484dfdc84c9a23c6fd2f