Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2025-21774
CVE-2025-21774:
Linux Debian vulnerability analysis and mitigation
Overview
CVE-2025-21774 was disclosed on February 26, 2025, affecting the Linux kernel. The vulnerability is related to a NULL pointer check issue in the rkcanfdhandlerxfifooverflow_int() function of the Rockchip CAN-FD controller driver. The vulnerability has been assigned a CVSS v3.1 base score of 5.5 (MEDIUM) (NVD).
Technical details
The vulnerability exists in the Linux kernel's Rockchip CAN-FD controller driver where there was an incorrect NULL pointer check in the rkcanfdhandlerxfifooverflow_int() function. Specifically, the function failed to properly bail out if a socket buffer (skb) could not be allocated. The issue was introduced in the commit that added the Rockchip CAN-FD controller driver. The vulnerability has been classified as CWE-476 (NULL Pointer Dereference) (NVD).
Impact
The vulnerability could lead to a NULL pointer dereference in the Linux kernel when handling CAN-FD controller operations, potentially causing a denial of service condition through kernel crashes (NVD).
Mitigation and workarounds
The vulnerability has been fixed in the Linux kernel through a patch that corrects the NULL pointer check in rkcanfdhandlerxfifooverflow_int() to properly bail out if skb cannot be allocated. The fix has been applied to affected versions including Linux kernel 6.12 through 6.12.16 and 6.13 through 6.13.4 (Kernel Patch).
Additional resources
Source: This report was generated using AI
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