CVE-2025-38617

In the Linux kernel, the following vulnerability has been resolved: net/packet: fix a race in packet_set_ring() and packet_notifier() When packet_set_ring() releases po->bind_lock, another thread can run packet_notifier() and process an NETDEV_UP event. This race and the fix are both similar to that of commit 15fe076edea7 ("net/packet: fix a race in packet_bind() and packet_notifier()"). There too the packet_notifier NETDEV_UP event managed to run while a po->bind_lock critical section had to be temporarily released. And the fix was similarly to temporarily set po->num to zero to keep the socket unhooked until the lock is retaken. The po->bind_lock in packet_set_ring and packet_notifier precede the introduction of git history.

CVSS 3.1

4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-25)

CWE

CWE-362

Published

2025-08-22

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• debian:debian_linux
• linux:linux_kernel

References

• https://blog.calif.io/p/a-race-within-a-race-exploiting-cve
• https://git.kernel.org/stable/c/01d3c8417b9c1b884a8a981a3b886da556512f36
• https://git.kernel.org/stable/c/18f13f2a83eb81be349a9757ba2141ff1da9ad73
• https://git.kernel.org/stable/c/7da733f117533e9b2ebbd530a22ae4028713955c
• https://git.kernel.org/stable/c/7de07705007c7e34995a5599aaab1d23e762d7ca

Check your stackJSON