SB2025091998 - NULL pointer dereference in Linux kernel ipv4
Published: September 19, 2025 Updated: September 22, 2025
Security Bulletin ID
SB2025091998
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-2022-50405)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the EXPORT_SYMBOL_GPL() function in net/ipv4/udp_tunnel.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/303000c793f705d07b551eb7c1c27001c5b33c8d
- https://git.kernel.org/stable/c/3cf7203ca620682165706f70a1b12b5194607dce
- https://git.kernel.org/stable/c/588d0b8462f5ffed3e677e65639825b2678117ab
- https://git.kernel.org/stable/c/84e566d157cc22ad2da8bdd970495855fbf13d92
- https://git.kernel.org/stable/c/91f09a776ae335ca836ed864b8f2a9461882a280
- https://git.kernel.org/stable/c/9a6544343bba7da929d6d4a2dc44ec0f15970081
- https://git.kernel.org/stable/c/b38aa7465411795e9e744b8d94633910497fec2a
- https://git.kernel.org/stable/c/be34e79e0ae6adbf6e7e75ddaee9ad84795ab933
- https://git.kernel.org/stable/c/e8316584b0a6c61c9c407631040c22712b26e38c
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.337