CVE-2026-74625netfilter: bridge: release template ct on non-IP path
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: netfilter: bridge: release template ct on non-IP path A bridge nftables ct zone set rule can attach a conntrack template to an skb before nf_ct_bridge_pre() sees it. For non-IPv4 and non-IPv6 EtherTypes, nf_ct_bridge_pre() currently overwrites skb->_nfct with IP_CT_UNTRACKED without releasing the existing template reference. That makes the per-cpu template, and any temporary templates allocated for concurrent use, unreachable and leaks memory until the host runs out of slab. Reset the skb conntrack state before marking the frame untracked so the existing template reference is dropped on the non-IP path.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 3c171f496ef57774f8e5d509923372549734877f before fc90df37540627d092af770215fb4b7befe9409b; from 3c171f496ef57774f8e5d509923372549734877f before daa6e070f8e1e7a4dddec8b64ca37663f8cda917; from 3c171f496ef57774f8e5d509923372549734877f before bd7b16494dacf87e9336a1dcfdada83b9e40edd6; from 3c171f496ef57774f8e5d509923372549734877f before 6ea88401e10e04e0b3bb7a7adea54932fb60b93b; from 3c171f496ef57774f8e5d509923372549734877f before 46d559f00b1ab1d114f92d2f16c5ef0093b3b9dd; from 3c171f496ef57774f8e5d509923372549734877f before c58d34fe8b7e47bb0b350a7625023b1261342be5; from 3c171f496ef57774f8e5d509923372549734877f before 7cff440d702616022769f2643168d7f9820547a0; from 3c171f496ef57774f8e5d509923372549734877f before d45cc8020d7c0a9f01dee42ff5c40bc14c9af72f | CNA record |
References
- https://git.kernel.org/stable/c/fc90df37540627d092af770215fb4b7befe9409b
- https://git.kernel.org/stable/c/daa6e070f8e1e7a4dddec8b64ca37663f8cda917
- https://git.kernel.org/stable/c/bd7b16494dacf87e9336a1dcfdada83b9e40edd6
- https://git.kernel.org/stable/c/6ea88401e10e04e0b3bb7a7adea54932fb60b93b
- https://git.kernel.org/stable/c/46d559f00b1ab1d114f92d2f16c5ef0093b3b9dd
- https://git.kernel.org/stable/c/c58d34fe8b7e47bb0b350a7625023b1261342be5
- https://git.kernel.org/stable/c/7cff440d702616022769f2643168d7f9820547a0
- https://git.kernel.org/stable/c/d45cc8020d7c0a9f01dee42ff5c40bc14c9af72f
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.