What’s Vulnerable › Vulnerabilities

CVE-2025-21918: usb: typec: ucsi: Fix NULL pointer access

• 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: 2025-04-01 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: Fix NULL pointer access Resources should be released only after all threads that utilize them have been destroyed. This commit ensures that resources are not released prematurely by waiting for the associated workqueue to complete before deallocating them.

Affected products

• Linux kernel: from 5.16 before 6.1.133; from 6.2 before 6.6.83; from 6.7 before 6.12.19; from 6.13 before 6.13.7; 6.14-rc1, 6.14-rc2, 6.14-rc3, 6.14-rc4, 6.14-rc5 — fixed in 6.1.133, 6.12.19, 6.13.7, 6.6.83

How to fix

Upgrade to a fixed version: Linux kernel 6.1.133, 6.12.19, 6.13.7, 6.6.83. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/079a3e52f3e751bb8f5937195bdf25c5d14fdff0
• https://git.kernel.org/stable/c/46fba7be161bb89068958138ea64ec33c0b446d4
• https://git.kernel.org/stable/c/592a0327d026a122e97e8e8bb7c60cbbe7697344
• https://git.kernel.org/stable/c/7a735a8a46f6ebf898bbefd96659ca5da798bce0
• https://git.kernel.org/stable/c/b13abcb7ddd8d38de769486db5bd917537b32ab1
• https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

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