Riskcovery

CVE-2025-38678

netfilter: nf_tables: reject duplicate device on updates

State
Published
Severity
7.8 High
Published
Sep 3, 2025
Updated
Oct 15, 2026
Reserved
Apr 16, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_tables: reject duplicate device on updates

A chain/flowtable update with duplicated devices in the same batch is possible. Unfortunately, netdev event path only removes the first device that is found, leaving unregistered the hook of the duplicated device.

Check if a duplicated device exists in the transaction batch, bail out with EEXIST in such case.

WARNING is hit when unregistering the hook:

[49042.221275] WARNING: CPU: 4 PID: 8425 at net/netfilter/core.c:340 nf_hook_entry_head+0xaa/0x150 [49042.221375] CPU: 4 UID: 0 PID: 8425 Comm: nft Tainted: G S 6.16.0+ #170 PREEMPT(full) [...] [49042.221382] RIP: 0010:nf_hook_entry_head+0xaa/0x150

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 78d9f48f7f44431a25da2b46b3a8812f6ff2b981 to before 0521e694d5b80899fba8695881a6349f9bc538cbAffected
  • 78d9f48f7f44431a25da2b46b3a8812f6ff2b981 to before 4681960bc0f4f8bcc782cbf2fd205f48ad314dfdAffected
  • 78d9f48f7f44431a25da2b46b3a8812f6ff2b981 to before 4ce2a0c3b8497a66cfc25fc7ca3d087258a785d2Affected
  • 78d9f48f7f44431a25da2b46b3a8812f6ff2b981 to before 3f358a66a04513311668ea4b40f5064e253d8386Affected
  • 78d9f48f7f44431a25da2b46b3a8812f6ff2b981 to before cf23d531a9d496863aa4c5a0e2f71f0a23f3df3cAffected
  • 78d9f48f7f44431a25da2b46b3a8812f6ff2b981 to before d7615bde541f16517d6790412da6ec46fa8a4c1fAffected
  • 78d9f48f7f44431a25da2b46b3a8812f6ff2b981 to before cf5fb87fcdaaaafec55dcc0dc5a9e15ead343973Affected
LinuxLinux
  • 5.8Affected
  • before 5.8Not affected
  • 5.10.247 through 5.10.*Not affected
  • 5.15.197 through 5.15.*Not affected
  • 6.1.159 through 6.1.*Not affected
  • 6.6.117 through 6.6.*Not affected
  • 6.12.59 through 6.12.*Not affected
  • 6.16.2 through 6.16.*Not affected
  • 6.17 and laterNot affected

References

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