SB2025100859 - Use-after-free in Linux kernel ipv4
Published: October 8, 2025 Updated: October 26, 2025
Security Bulletin ID
SB2025100859
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-2022-50536)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the tcp_bpf_send_verdict() function in net/ipv4/tcp_bpf.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/113236e8f49f262f318c00ebb14b15f4834e87c1
- https://git.kernel.org/stable/c/28e4a763cd4a2b1a78852216ef4bd7df3a05cec6
- https://git.kernel.org/stable/c/578a7628b838a3ac8ad61deaab5a816ff032ac13
- https://git.kernel.org/stable/c/7508b9f4daac4ec7dfe0b6fb2d688b1c1c105e10
- https://git.kernel.org/stable/c/7a9841ca025275b5b0edfb0b618934abb6ceec15
- https://git.kernel.org/stable/c/8786bde11a4f31b63b3036731df0b47337a7a245
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.86