Answer in brief
CVE-2026-72405 records a High severity (CVSS 7.8) vulnerability in net: udp_tunnel: prevent double queueing in udp_tunnel_nic_device_sync. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), 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), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <cee6688e5731c0591643521716d1a1a5c1a98bf8 || >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <9075efb9b2c1d9d7a8285c937b64aa93ca0c41b7 || >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <54292b167466cdf42176b7b6f01da66c184deb12 || >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <ecf69d4b43370c587e48d4d70289dbdb7e039d4d | cee6688e5731c0591643521716d1a1a5c1a98bf8, 9075efb9b2c1d9d7a8285c937b64aa93ca0c41b7, 54292b167466cdf42176b7b6f01da66c184deb12, ecf69d4b43370c587e48d4d70289dbdb7e039d4d |
| Linux/Linuxgeneric | 5.9 | Not reported |
| Linux/Linuxgeneric | >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <f49ed02fd8c98da823fdd7b00d64a8cc1d1883ac || >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <cee6688e5731c0591643521716d1a1a5c1a98bf8 || >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <9075efb9b2c1d9d7a8285c937b64aa93ca0c41b7 || >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <54292b167466cdf42176b7b6f01da66c184deb12 || >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <ecf69d4b43370c587e48d4d70289dbdb7e039d4d | f49ed02fd8c98da823fdd7b00d64a8cc1d1883ac, cee6688e5731c0591643521716d1a1a5c1a98bf8, 9075efb9b2c1d9d7a8285c937b64aa93ca0c41b7, 54292b167466cdf42176b7b6f01da66c184deb12, ecf69d4b43370c587e48d4d70289dbdb7e039d4d |
| Linux/Linuxgeneric | >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <d59d3b19e1cd1a01a6db59705327387a30aed153 || >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <f49ed02fd8c98da823fdd7b00d64a8cc1d1883ac || >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <cee6688e5731c0591643521716d1a1a5c1a98bf8 || >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <9075efb9b2c1d9d7a8285c937b64aa93ca0c41b7 || >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <54292b167466cdf42176b7b6f01da66c184deb12 || >=cc4e3835eff474aa274d6e1d18f69d9d296d3b76 <ecf69d4b43370c587e48d4d70289dbdb7e039d4d | d59d3b19e1cd1a01a6db59705327387a30aed153, f49ed02fd8c98da823fdd7b00d64a8cc1d1883ac, cee6688e5731c0591643521716d1a1a5c1a98bf8, 9075efb9b2c1d9d7a8285c937b64aa93ca0c41b7, 54292b167466cdf42176b7b6f01da66c184deb12, ecf69d4b43370c587e48d4d70289dbdb7e039d4d |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: net: udp_tunnel: prevent double queueing in udp_tunnel_nic_device_sync Yue Sun reported a use-after-free and debugobjects warning in udp_tunnel_nic_device_sync_work() during concurrent device operations. The workqueue core clears the internal pending bit before invoking the worker. At that point, a concurrent thread can queue the work again. When the already running worker eventually clears the work_pending flag to 0, it mistakenly clears the flag for the newly queued instance. udp_tunnel_nic_unregister() then observes work_pending as 0 and frees the structure while the second work item is still active in the queue, leading to UAF. Fix this by returning early in udp_tunnel_nic_device_sync() if work_pending is already set, preventing redundant work queueing.
Quoted source text, attributed separately from HOL analysis.