SB2025100523 - NULL pointer dereference in Linux kernel misc cxl driver
Published: October 5, 2025 Updated: October 27, 2025
Security Bulletin ID
SB2025100523
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-2022-50481)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the cxl_guest_init_afu() and cxl_guest_init_adapter() functions in drivers/misc/cxl/guest.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/170e8c2d2b61e15e7f7cfeded81bc1e959a15ed8
- https://git.kernel.org/stable/c/1ae581696b7a799afa39a664c4b721569643f58a
- https://git.kernel.org/stable/c/60b2ed21a65f3f5318666ccd765c3507991370cf
- https://git.kernel.org/stable/c/61c80d1c3833e196256fb060382db94f24d3d9a7
- https://git.kernel.org/stable/c/96fba6fb95bdede80583c262ac185da09661f264
- https://git.kernel.org/stable/c/ab44c182353be101c3be9465e1d15d42130c53c4
- https://git.kernel.org/stable/c/b32559ee4e6667c5c3daf4ec5454c277d1f255d2
- https://git.kernel.org/stable/c/d775a1da5a52b4f4bb02f2707ba420d1bec48dbb
- https://git.kernel.org/stable/c/e5021bbf11b024cc65ea1e84c377df484183be4b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.86