SB2025092222 - NULL pointer dereference in Linux kernel smc
Published: September 22, 2025
Security Bulletin ID
SB2025092222
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-2025-39857)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the smc_ib_is_sg_need_sync() function in net/smc/smc_ib.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/0cdf1fd8fc59d44a48c694324611136910301ef9
- https://git.kernel.org/stable/c/34f17cbe027050b8d5316ea1b6f9bd7c378e92de
- https://git.kernel.org/stable/c/ba1e9421cf1a8369d25c3832439702a015d6b5f9
- https://git.kernel.org/stable/c/eb929910bd4b4165920fa06a87b22cc6cae92e0e
- https://git.kernel.org/stable/c/f18d9b3abf9c6587372cc702f963a7592277ed56