What’s Vulnerable › Vulnerabilities

CVE-2025-21773: can: etas_es58x: fix potential NULL pointer dereference on udev->serial

• 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: 2025-02-27 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: fix potential NULL pointer dereference on udev->serial The driver assumed that es58x_dev->udev->serial could never be NULL. While this is true on commercially available devices, an attacker could spoof the device identity providing a NULL USB serial number. That would trigger a NULL pointer dereference. Add a check on es58x_dev->udev->serial before accessing it.

Affected products

• Linux kernel: from 6.2 before 6.6.79; from 6.7 before 6.12.16; from 6.13 before 6.13.4; 6.14-rc1, 6.14-rc2 — fixed in 6.12.16, 6.13.4, 6.6.79

How to fix

Upgrade to a fixed version: Linux kernel 6.12.16, 6.13.4, 6.6.79. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1590667a60753ee5a54871f2840ceefd4a7831fa
• https://git.kernel.org/stable/c/5059ea98d7bc133903d3e47ab36df6ed11d0c95f
• https://git.kernel.org/stable/c/722e8e1219c8b6ac2865011fe339315d6a8d0721
• https://git.kernel.org/stable/c/a1ad2109ce41c9e3912dadd07ad8a9c640064ffb

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