SB2025040227 - Memory leak in Linux kernel 8021q
Published: April 2, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025040227
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Memory leak (CVE-ID: CVE-2025-21920)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the vlan_check_real_dev() function in net/8021q/vlan.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0fb7aa04c19eac4417f360a9f7611a60637bdacc
- https://git.kernel.org/stable/c/30e8aee77899173a82ae5ed89f536c096f20aaeb
- https://git.kernel.org/stable/c/3561442599804905c3defca241787cd4546e99a7
- https://git.kernel.org/stable/c/5a515d13e15536e82c5c7c83eb6cf5bc4827fee5
- https://git.kernel.org/stable/c/7f1564b2b2072b7aa1ac75350e9560a07c7a44fd
- https://git.kernel.org/stable/c/b33a534610067ade2bdaf2052900aaad99701353
- https://git.kernel.org/stable/c/b6c72479748b7ea09f53ed64b223cee6463dc278
- https://git.kernel.org/stable/c/fa40ebef69234e39ec2d26930d045f2fb9a8cb2b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.235