SB2025022864 - Improper locking in Linux kernel batman-adv
Published: February 28, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025022864
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) Improper locking (CVE-ID: CVE-2025-21823)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the batadv_v_elp_start_timer(), batadv_v_elp_get_throughput(), batadv_v_elp_throughput_metric_update(), batadv_v_elp_wifi_neigh_probe() and batadv_v_elp_periodic_work() functions in net/batman-adv/bat_v_elp.c, within the batadv_v_hardif_neigh_init() function in net/batman-adv/bat_v.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/0fdc3c166ac17b26014313fa2b93696354511b24
- https://git.kernel.org/stable/c/781a06fd265a8151f7601122d9c2e985663828ff
- https://git.kernel.org/stable/c/8c8ecc98f5c65947b0070a24bac11e12e47cc65d
- https://git.kernel.org/stable/c/a7aa2317285806640c844acd4cd2cd768e395264
- https://git.kernel.org/stable/c/af264c2a9adc37f4bdf88ca7f3affa15d8c7de9e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.4