CVE-2026-53264 | In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: use RCU with deferred freeing for action lifecycle When NEWTFILTER and DELFILTER are run concurrently it is possible to create a race with an associated action. Let's illustrate with CPU0 running NEWTFILTER and CPU1 running DELFILTER: 0: mutex_lock() <-- holds the idr lock 0: rcu_read_lock() 0: p = idr_find(idr, index) <-- action p is valid (RCU protects IDR) 0: mu
In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_api: use RCU with deferred freeing for action lifecycle
When NEWTFILTER and DELFILTER are run concurrently it is possible to create a
race with an associated action.
Let's illustrate with CPU0 running NEWTFILTER and CPU1 running DELFILTER:
0: mutex_lock()
- 🔗 git.kernel.org/stable/c/98b2e40879abf0245be5a5b7af69e0f6…
- 🔗 git.kernel.org/stable/c/18af5d2ef0c4f65787fd1280c8b23286…
- 🔗 git.kernel.org/stable/c/1f1b98fea6b9ea30507d0f2fbff67502…
- 🔗 git.kernel.org/stable/c/8b136f18ac4b2ace5aaad3305b3f8a5d…
- 🔗 git.kernel.org/stable/c/5dd51e09020c65aa53cf128e5e3517cd…
- 🔗 git.kernel.org/stable/c/b60e9391142e983fab2be53497aa8f71…
- 🔗 git.kernel.org/stable/c/91d105d2cbe002f9c7b43a6183adedc3…
- 🔗 git.kernel.org/stable/c/5057e1aca011e51ef51498c940ef96f3…
Zero-Day & Vulnerability Intelligence Hub
Echtzeit-Tracking mit EPSS Exploit-Wahrscheinlichkeiten, Angriffsvektor-Decodern und KI-Patch-Anleitungen.
📊 Historien-Charts — Criticals-Trend · Vendors · EPSS-Verteilung
| Tier | 2026-08-29 | 2026-09-06 |
|---|---|---|
| ≥90 % | 4 | 0 |
| ≥50 % | 4 | 0 |
| ≥10 % | 3 | 0 |
| <10 % | 304 | 300 |
CVE-2026-53264 | In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: use RCU with deferred freeing for action lifecycle When NEWTFILTER and DELFILTER are run concurrently it is possible to create a race with an associated action. Let's illustrate with CPU0 running NEWTFILTER and CPU1 running DELFILTER: 0: mutex_lock() <-- holds the idr lock 0: rcu_read_lock() 0: p = idr_find(idr, index) <-- action p is valid (RCU protects IDR) 0: mu
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: use RCU with deferred freeing for action lifecycle When NEWTFILTER and DELFILTER are run concurrently it is possible to create a race with an associat