CVE-2026-74625
netfilter: bridge: release template ct on non-IP path
Description
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.
INFO
Published Date :
Aug. 22, 2026, 4:16 p.m.
Last Modified :
Aug. 22, 2026, 4:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-74625
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Reset skb conntrack state on non-IP path.
- Release existing template reference before overwriting.
- Ensure conntrack template is properly released.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-74625.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74625 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74625
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-74625 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74625 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 22, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3c171f496ef57774f8e5d509923372549734877f', 'lessThan': 'fc90df37540627d092af770215fb4b7befe9409b', 'versionType': 'git'}, {'status': 'affected', 'version': '3c171f496ef57774f8e5d509923372549734877f', 'lessThan': 'daa6e070f8e1e7a4dddec8b64ca37663f8cda917', 'versionType': 'git'}, {'status': 'affected', 'version': '3c171f496ef57774f8e5d509923372549734877f', 'lessThan': 'bd7b16494dacf87e9336a1dcfdada83b9e40edd6', 'versionType': 'git'}, {'status': 'affected', 'version': '3c171f496ef57774f8e5d509923372549734877f', 'lessThan': '6ea88401e10e04e0b3bb7a7adea54932fb60b93b', 'versionType': 'git'}, {'status': 'affected', 'version': '3c171f496ef57774f8e5d509923372549734877f', 'lessThan': '46d559f00b1ab1d114f92d2f16c5ef0093b3b9dd', 'versionType': 'git'}, {'status': 'affected', 'version': '3c171f496ef57774f8e5d509923372549734877f', 'lessThan': 'c58d34fe8b7e47bb0b350a7625023b1261342be5', 'versionType': 'git'}, {'status': 'affected', 'version': '3c171f496ef57774f8e5d509923372549734877f', 'lessThan': '7cff440d702616022769f2643168d7f9820547a0', 'versionType': 'git'}, {'status': 'affected', 'version': '3c171f496ef57774f8e5d509923372549734877f', 'lessThan': 'd45cc8020d7c0a9f01dee42ff5c40bc14c9af72f', 'versionType': 'git'}], 'programFiles': ['net/bridge/netfilter/nf_conntrack_bridge.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.3', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.265', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.216', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.183', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.152', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.104', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.45', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.9', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/bridge/netfilter/nf_conntrack_bridge.c'], 'defaultStatus': 'affected'}] Added Description 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. Added Reference https://git.kernel.org/stable/c/46d559f00b1ab1d114f92d2f16c5ef0093b3b9dd Added Reference https://git.kernel.org/stable/c/6ea88401e10e04e0b3bb7a7adea54932fb60b93b Added Reference https://git.kernel.org/stable/c/7cff440d702616022769f2643168d7f9820547a0 Added Reference https://git.kernel.org/stable/c/bd7b16494dacf87e9336a1dcfdada83b9e40edd6 Added Reference https://git.kernel.org/stable/c/c58d34fe8b7e47bb0b350a7625023b1261342be5 Added Reference https://git.kernel.org/stable/c/d45cc8020d7c0a9f01dee42ff5c40bc14c9af72f Added Reference https://git.kernel.org/stable/c/daa6e070f8e1e7a4dddec8b64ca37663f8cda917 Added Reference https://git.kernel.org/stable/c/fc90df37540627d092af770215fb4b7befe9409b