CVE-2026-74695

CVE CVE-2026-74695EUVD EUVD-2026-64382Published 2026-08-22T15:32:57.000ZLast changed 2026-08-25T05:41:38.000ZCVSS 7.5

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 4.17.1 <4.18; 2a79fd3908acd88e6cb0e620c314d7b1fee56a02 <8aecf0bbcc72605592134c917c222207d8f63ab0; patch: 6.18.45; 2a79fd3908acd88e6cb0e620c314d7b1fee56a02 <12afa450a6a6c0cce2c42b7545a9958f62d8a00c; patch: 0; b4b1adf2e66ecc7125c4117e7aad9ff61e2cfd27; patch: 7.2; 209dedf806d31095968f54323dbe62525b077b33; 2a79fd3908acd88e6cb0e620c314d7b1fee56a02 <538e67e8c7889cf5f93951f5309d1bcb41f86036; 4.18; 4.16.15 <4.17; patch: 7.1.9

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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