SB2025042238 - Use-after-free in Linux kernel net can driver
Published: April 22, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025042238
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2021-47668)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the can_restart() function in drivers/net/can/dev.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/03f16c5075b22c8902d2af739969e878b0879c94
- https://git.kernel.org/stable/c/08ab951787098ae0b6c0364aeea7a8138226f234
- https://git.kernel.org/stable/c/260925a0b7d2da5449f8ecfd02c1405e0c8a45b8
- https://git.kernel.org/stable/c/593c072b7b3c4d7044416eb039d9ad706bedd67a
- https://git.kernel.org/stable/c/92668d28c7e6a7a2ba07df287669ffcdf650c421
- https://git.kernel.org/stable/c/ac48ef15826e83f4206c47add61072e8fc76d328
- https://git.kernel.org/stable/c/bbc6847b9b8978b520f62fbc7c68c54ef0f8d282
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.254