Linux Kernel Netfilter Vulnerability Rated 7.5 CVSS

Last refreshed2026-10-15

Status: UPDATED | Advisory ID: CVE-2026-74695

Key Details

CVE	CVE-2026-74695
CVSS Score / Version	7.5 (High) / CVSS v3.1
Updated	2026-10-14
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is none; integrity impact is none; availability impact is high.
Affected products	Linux Kernel
Exploitation prediction (EPSS)	0.43% probability of exploitation in the next 30 days (35% percentile) -- FIRST.org's EPSS model.

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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

netfilter: nf_flow_table: drop existing skb dst before skb_dst_set_noref()

Incoming skbs passing through netfilter flowtable offload hooks (or XFRM

offload path) might already carry a ref-counted dst_entry assigned during

earlier RX or routing steps.

Calling skb_dst_set_noref() when skb already holds a ref-counted dst

overwrites skb->_skb_refdst, leaking the previous dst_entry reference

count and triggering a DEBUG_NET_WARN_ON_ONCE assertion in

skb_dst_check_unset():

WARNING: at skb_dst_check_unset include/linux/skbuff.h:1170

WARNING: at skb_dst_set_noref include/linux/skbuff.h:1234

WARNING: at nf_flow_offload_ip_hook+0xf6c/0x2b60 net/netfilter/nf_flow_table_ip.c:864

Drop any existing dst_entry reference with skb_dst_drop(skb) before

setting the non-referenced flowtable destination. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-74695
CVE	https://www.cve.org/CVERecord?id=CVE-2026-74695

Source

Reference

NVD

CVE