SB20250502123 - Use-after-free in Linux kernel sched
Published: May 2, 2025 Updated: May 10, 2025
Security Bulletin ID
SB20250502123
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-2022-49921)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the red_enqueue() function in net/sched/sch_red.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/170e5317042c302777ed6d59fdb84af9b0219d4e
- https://git.kernel.org/stable/c/52e0429471976785c155bfbf51d80990c6cd46e2
- https://git.kernel.org/stable/c/5960b9081baca85cc7dcb14aec1de85999ea9d36
- https://git.kernel.org/stable/c/795afe0b9bb6c915f0299a8e309936519be01619
- https://git.kernel.org/stable/c/8bdc2acd420c6f3dd1f1c78750ec989f02a1e2b9
- https://git.kernel.org/stable/c/a238cdcf2bdc72207c74375fc8be13ee549ca9db
- https://git.kernel.org/stable/c/e877f8fa49fbccc63cb2df2e9179bddc695b825a
- https://git.kernel.org/stable/c/fc4b50adb400ee5ec527a04073174e8e73a139fa
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.78