SB2025010924 - Use-after-free in Linux kernel bpf
Published: January 9, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025010924
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-2024-56786)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the bpf_link_inc() and bpf_link_free() functions in kernel/bpf/syscall.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/2fcb921c2799c49ac5e365cf4110f94a64ae4885
- https://git.kernel.org/stable/c/5fe23c57abadfd46a7a66e81f3536e4757252a0b
- https://git.kernel.org/stable/c/f44ec8733a8469143fde1984b5e6931b2e2f6f3f
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.66