CVE-2023-3317

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-06-23 · updated 2026-06-17
Weakness: CWE-416

Description

A use-after-free flaw was found in mt7921_check_offload_capability in drivers/net/wireless/mediatek/mt76/mt7921/init.c in wifi mt76/mt7921 sub-component in the Linux Kernel. This flaw could allow an attacker to crash the system after 'features' memory release. This vulnerability could even lead to a kernel information leak problem.

Affected products

Linux kernel: from 6.2 before 6.2.15; 6.3, 6.3-rc1, 6.3-rc2, 6.3-rc3, 6.3-rc4, 6.3-rc5 — fixed in 6.2.15

How to fix

Upgrade to a fixed version: Linux kernel 6.2.15. Check the vendor advisory for mitigations.

References

https://patchwork.kernel.org/project/linux-wireless/patch/51fd8f76494348aa9ecbf0abc471ebe47a983dfd.1679502607.git.lorenzo%40kernel.org/
https://patchwork.kernel.org/project/linux-wireless/patch/51fd8f76494348aa9ecbf0abc471ebe47a983dfd.1679502607.git.lorenzo%40kernel.org/

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