CVE-2026-68353
Description
A flaw was found in the Linux kernel's ath6kl Wi-Fi driver. The ath6kl_wmi_tx_complete_event_rx() function, responsible for handling Wi-Fi messages, does not properly validate the num_msg field provided by the firmware against the buffer length. A malicious or compromised firmware could send an inflated num_msg value, leading to an out-of-bounds read of up to 1020 bytes past the allocated buffer. This could result in information disclosure or potentially a denial of service.
Statement
This issue affects Qualcomm ath6kl Wi-Fi. TX complete handler loops on firmware num_msg without buffer bounds check, allowing large OOB reads. Systems without ath6kl hardware are not affected.
Mitigation
To mitigate this issue, prevent the ath6kl module from loading. See https://access.redhat.com/solutions/41278 for instructions.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | N/A | 8.1 |
| Attack Vector | Local | N/A | Adjacent Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | High |
| Integrity Impact | None | N/A | None |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
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