PT-2025-49087 · Linux+3 · Linux Kernel+3
Published
2025-12-04
·
Updated
2026-05-07
·
CVE-2025-40257
None
No severity ratings or metrics are available. When they are, we'll update the corresponding info on the page.
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains a flaw in the mptcp pm del add timer() function, which can lead to a race condition. Specifically, the function may call sk stop timer sync() while another process is freeing memory associated with the timer, resulting in a slab-use-after-free issue. This condition was identified through reports from syzbot, a kernel testing tool. The issue occurs during the processing of incoming options within the mptcp protocol, potentially impacting network stability. The root cause is a lack of proper synchronization mechanisms, allowing concurrent access to the timer data structure.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Found an issue in the description? Have something to add? Feel free to write us 👾
Related Identifiers
Affected Products
Debian
Linuxmint
Linux Kernel
Ubuntu