What’s Vulnerable › Vulnerabilities

CVE-2023-53384: wifi: mwifiex: avoid possible NULL skb pointer dereference

• Severity: medium (CVSS 5.5 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: 2025-09-18 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: avoid possible NULL skb pointer dereference In 'mwifiex_handle_uap_rx_forward()', always check the value returned by 'skb_copy()' to avoid potential NULL pointer dereference in 'mwifiex_uap_queue_bridged_pkt()', and drop original skb in case of copying failure. Found by Linux Verification Center (linuxtesting.org) with SVACE.

Affected products

• Linux kernel: from 3.7 before 4.14.326; from 4.15 before 4.19.295; from 4.20 before 5.4.257; from 5.5 before 5.10.195; from 5.11 before 5.15.132; from 5.16 before 6.1.53 — fixed in 4.14.326, 4.19.295, 5.10.195, 5.15.132, 5.4.257, 6.1.53

How to fix

Upgrade to a fixed version: Linux kernel 4.14.326, 4.19.295, 5.10.195, 5.15.132. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0c57f9ad2c3ed43abb764b0247d610ff7fdb7a00
• https://git.kernel.org/stable/c/139d285e7695279f030dbb172e2d0245425c86c6
• https://git.kernel.org/stable/c/231086e6a36316b823654f4535653f22d6344420
• https://git.kernel.org/stable/c/35a7a1ce7c7d61664ee54f5239a1f120ab95a87e
• https://git.kernel.org/stable/c/7e7197e4d6a1bc72a774590d8765909f898be1dc
• https://git.kernel.org/stable/c/bef85d58f7709896ed8426560ad117a73a37762f
• https://git.kernel.org/stable/c/c2509f7c37355e1f0bd5b7087815b845fd383723
• https://git.kernel.org/stable/c/d155c5f64cefacdc6a9a26d40be53ee2903c28ff
• https://git.kernel.org/stable/c/d7fd24b8d1bb54c5bcf583139e11a5e651e0263c

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