CVE-2025-38083
Description
In the Linux kernel, the following vulnerability has been resolved:
net_sched: prio: fix a race in prio_tune()
Gerrard Tai reported a race condition in PRIO, whenever SFQ perturb timer fires at the wrong time.
The race is as follows:
CPU 0 CPU 1 [1]: lock root [2]: qdisc_tree_flush_backlog() [3]: unlock root | | [5]: lock root | [6]: rehash | [7]: qdisc_tree_reduce_backlog() | [4]: qdisc_put()
This can be abused to underflow a parent's qlen.
Calling qdisc_purge_queue() instead of qdisc_tree_flush_backlog() should fix the race, because all packets will be purged from the qdisc before releasing the lock.
Affected products
1- Linux/Linuxv5Range: 5.0
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
3- lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlnvdThird Party Advisory
- lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlnvdThird Party Advisory
- cert-portal.siemens.com/productcert/html/ssa-082556.htmlnvd
News mentions
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