Answer in brief
CVE-2026-46322 records a High severity (CVSS 7.1) vulnerability in tun: free page on build_skb failure in tun_xdp_one(). 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.
Answer in brief
CVE-2026-46322 records a High severity (CVSS 7.1) vulnerability in tun: free page on build_skb failure in tun_xdp_one(). 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 7.1. 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 | >=043d222f93ab8c76b56a3b315cd8692e35affb6c <26fe549b5192536b6c1c68a2dfdc8c0dcf9fa4a9 || >=043d222f93ab8c76b56a3b315cd8692e35affb6c <793385c154771603b8671dd8338927221e9d8d78 || >=043d222f93ab8c76b56a3b315cd8692e35affb6c <2638a9c1521905bb5c5d1e95c8fbc09f79148ed7 || >=043d222f93ab8c76b56a3b315cd8692e35affb6c <60d9c0d6cdde5420d6483c921b16fe5465eb5238 || >=043d222f93ab8c76b56a3b315cd8692e35affb6c <d16e38fac09a47bfcf98c1ad65a1bb53f94540f5 || >=043d222f93ab8c76b56a3b315cd8692e35affb6c <aa308e9dbb9acb17cacdbbce9e4504f69bac8385 || >=043d222f93ab8c76b56a3b315cd8692e35affb6c <4fefc6156a162a9f50035c12091a5e5130c82c6e || >=043d222f93ab8c76b56a3b315cd8692e35affb6c <aa8963fdce667a42fb7f0bdd2909fadcab02f9a8 | 26fe549b5192536b6c1c68a2dfdc8c0dcf9fa4a9, 793385c154771603b8671dd8338927221e9d8d78, 2638a9c1521905bb5c5d1e95c8fbc09f79148ed7, 60d9c0d6cdde5420d6483c921b16fe5465eb5238, d16e38fac09a47bfcf98c1ad65a1bb53f94540f5, aa308e9dbb9acb17cacdbbce9e4504f69bac8385, 4fefc6156a162a9f50035c12091a5e5130c82c6e, aa8963fdce667a42fb7f0bdd2909fadcab02f9a8 |
| Linux/Linuxgeneric | 4.20 | Not reported |
Published upstream
Jun 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: tun: free page on build_skb failure in tun_xdp_one() When build_skb() fails in tun_xdp_one(), the function sets ret to -ENOMEM and jumps to the out label, which returns without freeing the page that vhost_net_build_xdp() allocated for the frame. As with the short-frame rejection path, tun_sendmsg() discards the per-buffer error and still returns total_len, so vhost_tx_batch() takes the success path and never frees the page. Each build_skb() failure in a batch leaks one page-frag chunk. Free the page before taking the error path, matching the put_page() the other error exits of tun_xdp_one() already perform.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.1. 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 | >=043d222f93ab8c76b56a3b315cd8692e35affb6c <26fe549b5192536b6c1c68a2dfdc8c0dcf9fa4a9 || >=043d222f93ab8c76b56a3b315cd8692e35affb6c <793385c154771603b8671dd8338927221e9d8d78 || >=043d222f93ab8c76b56a3b315cd8692e35affb6c <2638a9c1521905bb5c5d1e95c8fbc09f79148ed7 || >=043d222f93ab8c76b56a3b315cd8692e35affb6c <60d9c0d6cdde5420d6483c921b16fe5465eb5238 || >=043d222f93ab8c76b56a3b315cd8692e35affb6c <d16e38fac09a47bfcf98c1ad65a1bb53f94540f5 || >=043d222f93ab8c76b56a3b315cd8692e35affb6c <aa308e9dbb9acb17cacdbbce9e4504f69bac8385 || >=043d222f93ab8c76b56a3b315cd8692e35affb6c <4fefc6156a162a9f50035c12091a5e5130c82c6e || >=043d222f93ab8c76b56a3b315cd8692e35affb6c <aa8963fdce667a42fb7f0bdd2909fadcab02f9a8 | 26fe549b5192536b6c1c68a2dfdc8c0dcf9fa4a9, 793385c154771603b8671dd8338927221e9d8d78, 2638a9c1521905bb5c5d1e95c8fbc09f79148ed7, 60d9c0d6cdde5420d6483c921b16fe5465eb5238, d16e38fac09a47bfcf98c1ad65a1bb53f94540f5, aa308e9dbb9acb17cacdbbce9e4504f69bac8385, 4fefc6156a162a9f50035c12091a5e5130c82c6e, aa8963fdce667a42fb7f0bdd2909fadcab02f9a8 |
| Linux/Linuxgeneric | 4.20 | Not reported |
Published upstream
Jun 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: tun: free page on build_skb failure in tun_xdp_one() When build_skb() fails in tun_xdp_one(), the function sets ret to -ENOMEM and jumps to the out label, which returns without freeing the page that vhost_net_build_xdp() allocated for the frame. As with the short-frame rejection path, tun_sendmsg() discards the per-buffer error and still returns total_len, so vhost_tx_batch() takes the success path and never frees the page. Each build_skb() failure in a batch leaks one page-frag chunk. Free the page before taking the error path, matching the put_page() the other error exits of tun_xdp_one() already perform.
Quoted source text, attributed separately from HOL analysis.