CVE-2026-74695
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.
Affected versions
Linux kernel versions
4.16.15,
4.17.1,
4.18
and later are affected. Fixed in
6.18.45,
7.1.9,
7.2
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-74695?
CVE-2026-74695 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.16.15 onward and has been patched in 6.18.45, 7.1.9 and 7.2. CVE-2026-74695 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-74695?
Yes. CVE-2026-74695 has been patched. Fixed versions include 6.18.45, 7.1.9 and 7.2. If you are running Linux kernel 4.16.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-74695 actively exploited?
No. CVE-2026-74695 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.