What’s Vulnerable › Vulnerabilities

CVE-2023-52776: wifi: ath12k: fix dfs-radar and temperature event locking

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-21 · updated 2026-08-04
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: fix dfs-radar and temperature event locking The ath12k active pdevs are protected by RCU but the DFS-radar and temperature event handling code calling ath12k_mac_get_ar_by_pdev_id() was not marked as a read-side critical section. Mark the code in question as RCU read-side critical sections to avoid any potential use-after-free issues. Note that the temperature event handler looks like a place holder currently but would still trigger an RCU lockdep splat. Compile tested only.

Affected products

• Linux kernel: from 6.3 before 6.5.13; from 6.6 before 6.6.3 — fixed in 6.5.13, 6.6.3

How to fix

Upgrade to a fixed version: Linux kernel 6.5.13, 6.6.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/69bd216e049349886405b1c87a55dce3d35d1ba7
• https://git.kernel.org/stable/c/774de37c147fea81f2c2e4be5082304f4f71d535
• https://git.kernel.org/stable/c/d7a5f7f76568e48869916d769e28b9f3ca70c78e
• https://git.kernel.org/stable/c/69bd216e049349886405b1c87a55dce3d35d1ba7
• https://git.kernel.org/stable/c/774de37c147fea81f2c2e4be5082304f4f71d535
• https://git.kernel.org/stable/c/d7a5f7f76568e48869916d769e28b9f3ca70c78e

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