What’s Vulnerable › Vulnerabilities

CVE-2025-21775: can: ctucanfd: handle skb allocation failure

• 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: ctucanfd: handle skb allocation failure If skb allocation fails, the pointer to struct can_frame is NULL. This is actually handled everywhere inside ctucan_err_interrupt() except for the only place. Add the missed NULL check. Found by Linux Verification Center (linuxtesting.org) with SVACE static analysis tool.

Affected products

• Linux kernel: from 5.19 before 6.1.129; 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 6.1.129, 6.12.16, 6.13.4, 6.6.79

How to fix

Upgrade to a fixed version: Linux kernel 6.1.129, 6.12.16, 6.13.4, 6.6.79. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/84b9ac59978a6a4e0812d1c938fad97306272cef
• https://git.kernel.org/stable/c/9bd24927e3eeb85642c7baa3b28be8bea6c2a078
• https://git.kernel.org/stable/c/b0e592dd46a0a952b41c3bf6c963afdd6a42b526
• https://git.kernel.org/stable/c/e505b83b9ee6aa0ae2f4395f573a66579ae403fb
• https://git.kernel.org/stable/c/e7e2e2318b1f085044126ba553a4e619842fc36d
• https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html

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