Use After Free The advisory has been revoked - it doesn't affect any version of package perf (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-PERF-18989121
- published20 Aug 2026
- disclosed15 Aug 2026
Introduced: 15 Aug 2026
CVE-2026-72405 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL.
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.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2516694
- https://access.redhat.com/security/cve/CVE-2026-72405
- https://git.kernel.org/stable/c/54292b167466cdf42176b7b6f01da66c184deb12
- https://git.kernel.org/stable/c/9075efb9b2c1d9d7a8285c937b64aa93ca0c41b7
- https://git.kernel.org/stable/c/cee6688e5731c0591643521716d1a1a5c1a98bf8
- https://git.kernel.org/stable/c/ecf69d4b43370c587e48d4d70289dbdb7e039d4d
- https://git.kernel.org/stable/c/f49ed02fd8c98da823fdd7b00d64a8cc1d1883ac
- https://git.kernel.org/stable/c/d59d3b19e1cd1a01a6db59705327387a30aed153