SB20250916197 - NULL pointer dereference in Linux kernel misc cxl driver
Published: September 16, 2025 Updated: September 22, 2025
Security Bulletin ID
SB20250916197
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-2022-50244)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the pci_init_afu() and cxl_pci_init_adapter() functions in drivers/misc/cxl/pci.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/02cd3032b154fa02fdf90e7467abaeed889330b2
- https://git.kernel.org/stable/c/0f63c0ddc2ea20d783d29243f4dbe0f9e95dfdec
- https://git.kernel.org/stable/c/139abd4c626a6f7ce02789ed5f73aa2256e0542b
- https://git.kernel.org/stable/c/22511eefa61db26e12c97dd7ada3071dbdfcb004
- https://git.kernel.org/stable/c/2f5fd31b2f24b9b8a80ab566fd8c4e1e94cb4339
- https://git.kernel.org/stable/c/361412dae1690d4b5df6f92fc943cdc773c95cbc
- https://git.kernel.org/stable/c/82e5481428faf11c79b9c094dd24a1849bbf64ac
- https://git.kernel.org/stable/c/82e68432668ae75b4c814d160f6987ecb0681273
- https://git.kernel.org/stable/c/c4b2e35df919d99bbbed033c2fa0b607f9f463b5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.270