SB20240620110 - Null pointer dereference in Linux kernel ethernet sfc driver
Published: June 20, 2024 Updated: May 13, 2025
Security Bulletin ID
SB20240620110
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-2021-46949)
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_flush_done() 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/fb791572d6747ef385f628450f8d57cd132e6e5a
- https://git.kernel.org/stable/c/a1570985ec04116cc665b760faf666a104154170
- https://git.kernel.org/stable/c/98d91180748986bfb6dfb3e72765f3225719a647
- https://git.kernel.org/stable/c/5b1faa92289b53cad654123ed2bc8e10f6ddd4ac
- 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