CVE-2026-74625High· 7.5▾ Twilight

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

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. F…

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score41/ 100 · Moderate

impact 41.3 · likelihood 0.1 · exploitation 0

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.

…

Published

Aug 22, 2026

Updated

Oct 16, 2026

CVSS

7.5

Vendor

Linux

Product

Linux

CWE

—

Depth score

41 · Moderate

EPSS

0.50% · p43

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

decided 2026-10-16

Exploitation: none
Automatable: yes
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Oct 14.

0.5% → 0.5%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 55 days

Aug 22, 2026Published
Disclosed via NVD
Oct 14, 2026EPSS first tracked
0.5%
Oct 16, 2026Record revised
Last analysed / modified upstream

Linux #nvd #cve.org

Affected

Linux >= 3c171f496ef57774f8e5d509923372549734877f < fc90df37540627d092af770215fb4b7befe9409b
Linux >= 3c171f496ef57774f8e5d509923372549734877f < daa6e070f8e1e7a4dddec8b64ca37663f8cda917
Linux >= 3c171f496ef57774f8e5d509923372549734877f < bd7b16494dacf87e9336a1dcfdada83b9e40edd6
Linux >= 3c171f496ef57774f8e5d509923372549734877f < 6ea88401e10e04e0b3bb7a7adea54932fb60b93b
Linux >= 3c171f496ef57774f8e5d509923372549734877f < 46d559f00b1ab1d114f92d2f16c5ef0093b3b9dd
Linux >= 3c171f496ef57774f8e5d509923372549734877f < c58d34fe8b7e47bb0b350a7625023b1261342be5
Linux >= 3c171f496ef57774f8e5d509923372549734877f < 7cff440d702616022769f2643168d7f9820547a0
Linux >= 3c171f496ef57774f8e5d509923372549734877f < d45cc8020d7c0a9f01dee42ff5c40bc14c9af72f
Linux 5.3

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org

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CVE-2026-74625High· 7.5▾ Twilight

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

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score41/ 100 · Moderate

impact 41.3 · likelihood 0.1 · exploitation 0

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.

…

Published

Aug 22, 2026

Updated

Oct 16, 2026

CVSS

7.5

Vendor

Linux

Product

Linux

CWE

—

Depth score

41 · Moderate

EPSS

0.50% · p43

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

decided 2026-10-16

Exploitation: none
Automatable: yes
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Oct 14.

0.5% → 0.5%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 55 days

Aug 22, 2026Published
Disclosed via NVD
Oct 14, 2026EPSS first tracked
0.5%
Oct 16, 2026Record revised
Last analysed / modified upstream

Linux #nvd #cve.org

Affected

Linux >= 3c171f496ef57774f8e5d509923372549734877f < fc90df37540627d092af770215fb4b7befe9409b
Linux >= 3c171f496ef57774f8e5d509923372549734877f < daa6e070f8e1e7a4dddec8b64ca37663f8cda917
Linux >= 3c171f496ef57774f8e5d509923372549734877f < bd7b16494dacf87e9336a1dcfdada83b9e40edd6
Linux >= 3c171f496ef57774f8e5d509923372549734877f < 6ea88401e10e04e0b3bb7a7adea54932fb60b93b
Linux >= 3c171f496ef57774f8e5d509923372549734877f < 46d559f00b1ab1d114f92d2f16c5ef0093b3b9dd
Linux >= 3c171f496ef57774f8e5d509923372549734877f < c58d34fe8b7e47bb0b350a7625023b1261342be5
Linux >= 3c171f496ef57774f8e5d509923372549734877f < 7cff440d702616022769f2643168d7f9820547a0
Linux >= 3c171f496ef57774f8e5d509923372549734877f < d45cc8020d7c0a9f01dee42ff5c40bc14c9af72f
Linux 5.3

Full technical detail▾

Overview

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

netfilter: bridge: release template ct on non-IP path

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org