CVE-2025-38477
net/sched: sch_qfq: Fix race condition on qfq_aggregate
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: Fix race condition on qfq_aggregate A race condition can occur when 'agg' is modified in qfq_change_agg (called during qfq_enqueue) while other threads access it concurrently. For example, qfq_dump_class may trigger a NULL dereference, and qfq_delete_class may cause a use-after-free. This patch addresses the issue by: 1. Moved qfq_destroy_class into the critical section. 2. Added sch_tree_lock protection to qfq_dump_class and qfq_dump_class_stats.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 28, 2025 |
| Last Updated | May 12, 2026 |
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Affected Versions
Linux / Linux
462dbc9101acd38e92eda93c0726857517a24bbd < aa7a22c4d678bf649fd3a1d27debec583563414d 462dbc9101acd38e92eda93c0726857517a24bbd < d841aa5518508ab195b6781ad0d73ee378d713dd 462dbc9101acd38e92eda93c0726857517a24bbd < c6df794000147a3a02f79984aada4ce83f8d0a1e 462dbc9101acd38e92eda93c0726857517a24bbd < 466e10194ab81caa2ee6a332d33ba16bcceeeba6 462dbc9101acd38e92eda93c0726857517a24bbd < fbe48f06e64134dfeafa89ad23387f66ebca3527 462dbc9101acd38e92eda93c0726857517a24bbd < a6d735100f602c830c16d69fb6d780eebd8c9ae1 462dbc9101acd38e92eda93c0726857517a24bbd < c000a3a330d97f6c073ace5aa5faf94b9adb4b79 462dbc9101acd38e92eda93c0726857517a24bbd < 5e28d5a3f774f118896aec17a3a20a9c5c9dfc64
Linux / Linux
3.8
References
git.kernel.org: https://git.kernel.org/stable/c/aa7a22c4d678bf649fd3a1d27debec583563414d git.kernel.org: https://git.kernel.org/stable/c/d841aa5518508ab195b6781ad0d73ee378d713dd git.kernel.org: https://git.kernel.org/stable/c/c6df794000147a3a02f79984aada4ce83f8d0a1e git.kernel.org: https://git.kernel.org/stable/c/466e10194ab81caa2ee6a332d33ba16bcceeeba6 git.kernel.org: https://git.kernel.org/stable/c/fbe48f06e64134dfeafa89ad23387f66ebca3527 git.kernel.org: https://git.kernel.org/stable/c/a6d735100f602c830c16d69fb6d780eebd8c9ae1 git.kernel.org: https://git.kernel.org/stable/c/c000a3a330d97f6c073ace5aa5faf94b9adb4b79 git.kernel.org: https://git.kernel.org/stable/c/5e28d5a3f774f118896aec17a3a20a9c5c9dfc64 lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html cert-portal.siemens.com: https://cert-portal.siemens.com/productcert/html/ssa-082556.html