Answer in brief
CVE-2026-23001 records a High severity (CVSS 7.8) vulnerability in macvlan: fix possible UAF in macvlan_forward_source(). 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 7.8. 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 | >=79cf79abce71eb7dbc40e2f3121048ca5405cb47 <8133e85b8a3ec9f10d861e0002ec6037256e987e || >=79cf79abce71eb7dbc40e2f3121048ca5405cb47 <484919832e2db6ce1e8add92c469e5d459a516b5 || >=79cf79abce71eb7dbc40e2f3121048ca5405cb47 <232afc74a6dde0fe1830988e5827921f5ec9bb3f || >=79cf79abce71eb7dbc40e2f3121048ca5405cb47 <15f6faf36e162532bec5cc05eb3fc622108bf2ed || >=79cf79abce71eb7dbc40e2f3121048ca5405cb47 <8518712a2ca952d6da2238c6f0a16b4ae5ea3f13 || >=79cf79abce71eb7dbc40e2f3121048ca5405cb47 <6dbead9c7677186f22b7981dd085a0feec1f038e || >=79cf79abce71eb7dbc40e2f3121048ca5405cb47 <7470a7a63dc162f07c26dbf960e41ee1e248d80e | 8133e85b8a3ec9f10d861e0002ec6037256e987e, 484919832e2db6ce1e8add92c469e5d459a516b5, 232afc74a6dde0fe1830988e5827921f5ec9bb3f, 15f6faf36e162532bec5cc05eb3fc622108bf2ed, 8518712a2ca952d6da2238c6f0a16b4ae5ea3f13, 6dbead9c7677186f22b7981dd085a0feec1f038e, 7470a7a63dc162f07c26dbf960e41ee1e248d80e |
| Linux/Linuxgeneric | 3.18 | Not reported |
Published upstream
Jan 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 19, 2026
In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlan_forward_source() Add RCU protection on (struct macvlan_source_entry)->vlan. Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts. This allows macvlan_forward_source() to skip over entries queued for freeing. Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)). https: //lore.kernel.org/netdev/[email protected]/T/#u
Quoted source text, attributed separately from HOL analysis.