{"apiVersion":"1.0","identifier":"CVE-2026-72405","description":"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.","publishedAt":"2026-08-15T06:22:14","lastModifiedAt":"2026-08-17T06:19:07","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72405","cvssScore":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00134,"riskScore":0.79,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-72405","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-72405","en":"https://www.redsauce.net/en/cves/CVE-2026-72405","fr":"https://www.redsauce.net/fr/cves/CVE-2026-72405","pt":"https://www.redsauce.net/pt/cves/CVE-2026-72405","de":"https://www.redsauce.net/de/cves/CVE-2026-72405","sk":"https://www.redsauce.net/sk/cves/CVE-2026-72405","el":"https://www.redsauce.net/el/cves/CVE-2026-72405"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-72405"}}