What’s Vulnerable › Vulnerabilities

CVE-2026-68353: wifi: ath6kl: fix OOB read from firmware num_msg in TX complete handler

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-10 · updated 2026-10-19
• Weakness: CWE-125

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.

Affected products

• Linux kernel: 3.2 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0e0fc04af9b443c6b425f00fb604ff599bc80d1d
• https://git.kernel.org/stable/c/289edc3c71344b89e6522891147cfb8f61b088bb
• https://git.kernel.org/stable/c/35196a07603f8c94a4943093bc26d5b5826285f8
• https://git.kernel.org/stable/c/3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495
• https://git.kernel.org/stable/c/5297299c3fa6133275db0be99d69cd759b6cbfe9
• https://git.kernel.org/stable/c/69ac7ba3a3df6654e7daa82674575a8c4a1a63ea
• https://git.kernel.org/stable/c/c38b0d5c661951b5dd082bdf31f8a57a0ce6e540
• https://git.kernel.org/stable/c/eb636fbc443149b3501c3f97e26225ddcb314a0f

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