CVE-2026-68353

high

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler The firmware-controlled num_msg field (u8, 0-255) drives the loop in ath6kl_wmi_tx_complete_event_rx() without validation against the buffer length. This allows out-of-bounds reads of up to 1020 bytes past the WMI event buffer when the firmware sends an inflated num_msg. Add a check that the buffer is large enough to hold the fixed struct and the num_msg variable-length entries.

References

https://git.kernel.org/stable/c/eb636fbc443149b3501c3f97e26225ddcb314a0f

https://git.kernel.org/stable/c/c38b0d5c661951b5dd082bdf31f8a57a0ce6e540

https://git.kernel.org/stable/c/69ac7ba3a3df6654e7daa82674575a8c4a1a63ea

https://git.kernel.org/stable/c/3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495

https://git.kernel.org/stable/c/289edc3c71344b89e6522891147cfb8f61b088bb

Details

Source: Mitre, NVD

Published: 2026-08-10

Updated: 2026-08-10

Risk Information

CVSS v2

Base Score: 6.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 7.1

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Severity: High