CVE-2025-38678high

CVE-2025-38678: high-severity vulnerability in Linux

netfilter: nf_tables: reject duplicate device on updates

Published · Updated

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.8epss 0.3%
exploitation probability
0.3%top 81% of all CVEs
observed exploitation
nono source reports it
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
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · Linux
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References
https://git.kernel.org/stable/c/0521e694d5b80899fba8695881a6349f9bc538cbhttps://git.kernel.org/stable/c/3f358a66a04513311668ea4b40f5064e253d8386https://git.kernel.org/stable/c/4681960bc0f4f8bcc782cbf2fd205f48ad314dfdhttps://git.kernel.org/stable/c/4ce2a0c3b8497a66cfc25fc7ca3d087258a785d2https://git.kernel.org/stable/c/cf23d531a9d496863aa4c5a0e2f71f0a23f3df3chttps://git.kernel.org/stable/c/cf5fb87fcdaaaafec55dcc0dc5a9e15ead343973https://git.kernel.org/stable/c/d7615bde541f16517d6790412da6ec46fa8a4c1f