What’s Vulnerable › Vulnerabilities

CVE-2026-74408: wifi: ath9k: fix OOB access from firmware tx status queue ID

• 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: 2026-08-15 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k: fix OOB access from firmware tx status queue ID ath_tx_edma_tasklet() accesses sc->tx.txq[ts.qid] where ts.qid is a 4-bit hardware field (0-15), but the txq array only has ATH9K_NUM_TX_QUEUES (10) entries. A qid >= 10 causes an OOB array access. Add a bounds check on ts.qid before using it as an array index.

Affected products

• Linux kernel: 3.1 — 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/336d4c8cd9b1646060ee690c881d465dfc09c6c0
• https://git.kernel.org/stable/c/46ca1451f61b598f45cb5259e066d305444d95fc
• https://git.kernel.org/stable/c/5435fd3edcb11c7cc4002847c83e9a50b49284dc
• https://git.kernel.org/stable/c/734db72d55ca578a344dfa33e30145032c074b25
• https://git.kernel.org/stable/c/7ce2f118a2389e8f0a64068c6fe7cc7d40639be0
• https://git.kernel.org/stable/c/a9e055ac62cb3fcea262d4b687ec73eed82b3379
• https://git.kernel.org/stable/c/f5931d06b45ed402572bfe5832fff15864ef5481
• https://git.kernel.org/stable/c/fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54

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