Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected cc4e3835eff474aa274d6e1d18f69d9d296d3b76 before f49ed02fd8c98da823fdd7b00d64a8cc1d1883ac; affected cc4e3835eff474aa274d6e1d18f69d9d296d3b76 before cee6688e5731c0591643521716d1a1a5c1a98bf8; affected cc4e3835eff474aa274d6e1d18f69d9d296d3b76 before 9075efb9b2c1d9d7a8285c937b64aa93ca0c41b7; affected cc4e3835eff474aa274d6e1d18f69d9d296d3b76 before 54292b167466cdf42176b7b6f01da66c184deb12; affected cc4e3835eff474aa274d6e1d18f69d9d296d3b76 before ecf69d4b43370c587e48d4d70289dbdb7e039d4d |
| Linux / Linux | affected 5.9; unaffected 0 before 5.9; unaffected 6.6.160 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/f49ed02fd8c98da823fdd7b00d64a8cc1d1883ac
- https://git.kernel.org/stable/c/cee6688e5731c0591643521716d1a1a5c1a98bf8
- https://git.kernel.org/stable/c/9075efb9b2c1d9d7a8285c937b64aa93ca0c41b7
- https://git.kernel.org/stable/c/54292b167466cdf42176b7b6f01da66c184deb12
- https://git.kernel.org/stable/c/ecf69d4b43370c587e48d4d70289dbdb7e039d4d
ADP enrichment
No English description supplied.
No references supplied.