CVE-2025-38665 - Linux Kernel CAN NULL Pointer Dereference Vulnerability

CVE-2025-38665 - Linux Kernel CAN NULL Pointer Dereference Vulnerability

https://cvefeed.io/rssfeed/latest.atom / Fri, 08/22/2025 - 20:35
CVE ID : CVE-2025-38665
Published : Aug. 22, 2025, 4:15 p.m. | 52 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: can: netlink: can_changelink(): fix NULL pointer deref of struct can_priv::do_set_mode Andrei Lalaev reported a NULL pointer deref when a CAN device is restarted from Bus Off and the driver does not implement the struct can_priv::do_set_mode callback. There are 2 code path that call struct can_priv::do_set_mode: - directly by a manual restart from the user space, via can_changelink() - delayed automatic restart after bus off (deactivated by default) To prevent the NULL pointer deference, refuse a manual restart or configure the automatic restart delay in can_changelink() and report the error via extack to user space. As an additional safety measure let can_restart() return an error if can_priv::do_set_mode is not set instead of dereferencing it unchecked.
Severity: 0.0 | NA
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