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.
Does this matter?
Lower severity and a low EPSS score (0.40%). Track it; it rarely justifies an emergency change on its own.
Description
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
- 4.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.40% probability · 34th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- linux/linux kernel · debian/debian linux
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS 0.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://blog.calif.io/p/a-race-within-a-race-exploiting-cve
- https://git.kernel.org/stable/c/01d3c8417b9c1b884a8a981a3b886da556512f36Patch
- https://git.kernel.org/stable/c/18f13f2a83eb81be349a9757ba2141ff1da9ad73Patch
- https://git.kernel.org/stable/c/7da733f117533e9b2ebbd530a22ae4028713955cPatch
- https://git.kernel.org/stable/c/7de07705007c7e34995a5599aaab1d23e762d7caPatch
- https://git.kernel.org/stable/c/88caf46db8239e6471413d28aabaa6b8bd552805Patch
- https://git.kernel.org/stable/c/ba2257034755ae773722f15f4c3ad1dcdad15ca9Patch
- https://git.kernel.org/stable/c/e50ccfaca9e3c671cae917dcb994831a859cf588Patch
- https://git.kernel.org/stable/c/f1791fd7b845bea0ce9674fcf2febee7bc87a893Patch
- https://git.kernel.org/stable/c/f2e8fcfd2b1bc754920108b7f2cd75082c5a18dfPatch
- https://github.com/google/security-research/pull/339
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.