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🛡️ CVE-2025-38617 — debian-linux

🟠 CVSS 7.8 — High ✅ No Known Exploit CWE-362 NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

net/packet: fix a race in packet_set_ring() and packet_notifier()

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2025-38617 is classified as CWE-362: Race Condition. Concurrent operations share state without proper synchronisation, so timing decides whether the result is correct.

Affected software

CVE-2025-38617 is recorded against 3 packages.

  • debian-linux
  • kernel (from 6.16.0 up to 6.16.1)
  • linux-kernel

Timeline and source

Published on 22 August 2025 and last revised on 30 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

blog.calif.io
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
github.com
lists.debian.org
lists.debian.org

CVE-2025-38617 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-362
Public Exploit ✅ No
Source NVD
Published 2025-08-22
Updated 2026-08-20
Modified 2026-07-30

Affected Packages

Software From version Fixed in
debian-linux — —
kernel 6.16.0 6.16.1
linux-kernel — —

References

Similar Threats

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