CVE-2024-53203: usb: typec: fix potential array underflow in ucsi_ccg_sync_control()

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-12-27 · updated 2026-06-17
Weakness: CWE-129

Description

In the Linux kernel, the following vulnerability has been resolved: usb: typec: fix potential array underflow in ucsi_ccg_sync_control() The "command" variable can be controlled by the user via debugfs. The worry is that if con_index is zero then "&uc->ucsi->connector[con_index - 1]" would be an array underflow.

Affected products

Linux kernel: from 5.6 before 6.11.11; from 6.12 before 6.12.2 — fixed in 6.11.11, 6.12.2

How to fix

Upgrade to a fixed version: Linux kernel 6.11.11, 6.12.2. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/0e66fd8e5a2e45c7dacfc9178ba702153f4a61a8
https://git.kernel.org/stable/c/56971710cd541f2f05160a84b3183477d34a1be9
https://git.kernel.org/stable/c/627c2a5056aba42a8a96a8fffe8996aeccf919a9
https://git.kernel.org/stable/c/e15fd96c0b701c53f9006bcc836eaeb35a05a023
https://git.kernel.org/stable/c/e44189455c62469eb91d383ce9103d54c1f807a3
https://git.kernel.org/stable/c/e56aac6e5a25630645607b6856d4b2a17b2311a5
https://git.kernel.org/stable/c/ef92cd55289a282910575c5b9d87f646f2d39b38
https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html

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