CVE-2025-38617

Published Aug 22, 2025

Last updated 3 months ago

Overview

AI description

Automated description summarized from trusted sources.

CVE-2025-38617 describes a race condition vulnerability found within the Linux kernel's networking subsystem. Specifically, the flaw occurs in the `net/packet` module during the interaction between the `packet_set_ring()` and `packet_notifier()` functions. The vulnerability arises when `packet_set_ring()` releases the `po->bind_lock`, which can allow a separate thread to execute `packet_notifier()` and process an `NETDEV_UP` event. This race condition is analogous to a previously addressed issue. The resolution involves temporarily setting `po->num` to zero, ensuring the socket remains unhooked until the lock is reacquired.

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.
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD status: Modified
Products: linux_kernel, debian_linux

Risk scores

CVSS 3.1

Type: Primary
Base score: 4.7
Impact score: 3.6
Exploitability score: 1
Vector string: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Severity: MEDIUM

Weaknesses

nvd@nist.gov: CWE-362

Hype score: Not currently trending

Configurations

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References

Sources include official advisories and independent security research.