What’s Vulnerable › Vulnerabilities

CVE-2026-68199: wifi: ath6kl: fix OOB access from firmware ADDBA window size

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% 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-20

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath6kl: fix OOB access from firmware ADDBA window size aggr_recv_addba_req_evt() logs a debug message when the firmware-supplied win_sz is outside [AGGR_WIN_SZ_MIN, AGGR_WIN_SZ_MAX] but does not return. The out-of-range win_sz is then used in TID_WINDOW_SZ() to compute a kzalloc size and stored in rxtid->hold_q_sz, leading to zero-size or overflowed allocations and subsequent out-of-bounds access. Clean up any previously active aggregation session for the TID first, then return early when win_sz is out of the valid range, instead of proceeding with a broken allocation size.

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/44126b6994eeb28f2103b638e698f40a1244f327
• https://git.kernel.org/stable/c/58c6c8dc2e022e1b4f3dc58725a1ca49ff470f9c
• https://git.kernel.org/stable/c/5a65fd4722416061698b0a3277222381efbc4882
• https://git.kernel.org/stable/c/67bc9af4f41f2bdba20404fbd753b2a1bd6dd352
• https://git.kernel.org/stable/c/c8e3ca7954d8233fbc54bd370c1827670f43c538
• https://git.kernel.org/stable/c/cec0a487cf38ac1f9bca240ffe8a94c5014b72f2
• https://git.kernel.org/stable/c/d4558c140782180e2c80a7588a4af9f8675adfc4
• https://git.kernel.org/stable/c/f480d9910fcfe326db3a6281df80e83af347193e

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