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CVE-2026-31549: i2c: cp2615: fix serial string NULL-deref at probe

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-24 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: i2c: cp2615: fix serial string NULL-deref at probe The cp2615 driver uses the USB device serial string as the i2c adapter name but does not make sure that the string exists. Verify that the device has a serial number before accessing it to avoid triggering a NULL-pointer dereference (e.g. with malicious devices).

Affected products

• Linux kernel: from 5.13.1 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.20; from 6.19 before 6.19.10 — fixed in 5.15.203, 6.1.167, 6.12.78, 6.18.20, 6.19.10, 6.6.130

How to fix

Upgrade to a fixed version: Linux kernel 5.15.203, 6.1.167, 6.12.78, 6.18.20. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/13ccf9b106bba121728f1625c4375a1bd8f5c5a3
• https://git.kernel.org/stable/c/4a22af879172336370ae3e81e7f65fb2f69472ee
• https://git.kernel.org/stable/c/69aece634a7eebafd9a596e5494d52facf6f26ec
• https://git.kernel.org/stable/c/a9778298f47036866ea15eeb17242e8a4612580f
• https://git.kernel.org/stable/c/aa79f996eb41e95aed85a1bd7f56bcd6a3842008
• https://git.kernel.org/stable/c/e68c267787778bcdf3d91b06f794faaba7f0d1d1
• https://git.kernel.org/stable/c/efe996bcfe50c2dcc6cf65c574285713b722ced7

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