Answer in brief
CVE-2026-74695 records a High severity (CVSS 7.5) vulnerability in netfilter: nf_flow_table: drop existing skb dst before skb_dst_set_noref(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=2a79fd3908acd88e6cb0e620c314d7b1fee56a02 <12afa450a6a6c0cce2c42b7545a9958f62d8a00c || >=2a79fd3908acd88e6cb0e620c314d7b1fee56a02 <538e67e8c7889cf5f93951f5309d1bcb41f86036 || >=2a79fd3908acd88e6cb0e620c314d7b1fee56a02 <8aecf0bbcc72605592134c917c222207d8f63ab0 || b4b1adf2e66ecc7125c4117e7aad9ff61e2cfd27 || 209dedf806d31095968f54323dbe62525b077b33 || >=4.16.15 <4.17 || >=4.17.1 <4.18 | 12afa450a6a6c0cce2c42b7545a9958f62d8a00c, 538e67e8c7889cf5f93951f5309d1bcb41f86036, 8aecf0bbcc72605592134c917c222207d8f63ab0, 4.17, 4.18 |
| Linux/Linuxgeneric | 4.18 | Not reported |
Published upstream
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 22, 2026
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.
Quoted source text, attributed separately from HOL analysis.