SB20240620111 - Null pointer dereference in Linux kernel ethernet sfc driver
Published: June 20, 2024 Updated: May 13, 2025
Security Bulletin ID
SB20240620111
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) Null pointer dereference (CVE-ID: CVE-2021-46948)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to null pointer dereference error within the efx_farch_handle_tx_event() function in drivers/net/ethernet/sfc/farch.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/bf2b941d0a6f2d3b9f5fa3c4c21bdd54f71ce253
- https://git.kernel.org/stable/c/35c7a83ad1bb1d48ae249346e61b1132bcbf9052
- https://git.kernel.org/stable/c/e531db1ea6f98c9612cb2de093a107c7eadfb96c
- https://git.kernel.org/stable/c/83b09a1807415608b387c7bc748d329fefc5617e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.36
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.20
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13