SB2025052137 - Improper locking in Linux kernel xen xenbus driver
Published: May 21, 2025
Security Bulletin ID
SB2025052137
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) Improper locking (CVE-ID: CVE-2025-37949)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the xs_suspend_exit(), xs_send(), xs_wait_for_reply(), xenbus_dev_request_and_reply() and xs_talkv() functions in drivers/xen/xenbus/xenbus_xs.c, within the xenbus_dev_queue_reply() function in drivers/xen/xenbus/xenbus_dev_frontend.c, within the process_msg() and process_writes() functions in drivers/xen/xenbus/xenbus_comms.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/1f0304dfd9d217c2f8b04a9ef4b3258a66eedd27
- https://git.kernel.org/stable/c/2466b0f66795c3c426cacc8998499f38031dbb59
- https://git.kernel.org/stable/c/4d260a5558df4650eb87bc41b2c9ac2d6b2ba447
- https://git.kernel.org/stable/c/8b02f85e84dc6f7c150cef40ddb69af5a25659e5
- https://git.kernel.org/stable/c/8e9c8a0393b5f85f1820c565ab8105660f4e8f92
- https://git.kernel.org/stable/c/cbfaf46b88a4c01b64c4186cdccd766c19ae644c