Vulnerability Monitor

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CVE-2025-38108

In the Linux kernel, the following vulnerability has been resolved: net_sched: red: fix a race in __red_change() Gerrard Tai reported a race condition in RED, 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.

Published

2025-07-03T09:15:24.413

Last Modified

2025-12-16T17:02:20.770

Status

Analyzed

Source

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Severity

CVSSv3.1: 7.0 (HIGH)

Weaknesses
  • Type: Primary
    CWE-362
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System linux linux_kernel < 5.4.295 Yes
Operating System linux linux_kernel < 5.10.239 Yes
Operating System linux linux_kernel < 5.15.186 Yes
Operating System linux linux_kernel < 6.1.142 Yes
Operating System linux linux_kernel < 6.6.94 Yes
Operating System linux linux_kernel < 6.12.34 Yes
Operating System linux linux_kernel < 6.15.3 Yes
Operating System linux linux_kernel 6.16 Yes
Operating System debian debian_linux 11.0 Yes
References