Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
462dbc9101acd38e92eda93c0726857517a24bbd to < aa7a22c4d678bf649fd3a1d27debec583563414daffected462dbc9101acd38e92eda93c0726857517a24bbd to < d841aa5518508ab195b6781ad0d73ee378d713ddaffected462dbc9101acd38e92eda93c0726857517a24bbd to < c6df794000147a3a02f79984aada4ce83f8d0a1eaffected462dbc9101acd38e92eda93c0726857517a24bbd to < 466e10194ab81caa2ee6a332d33ba16bcceeeba6affected462dbc9101acd38e92eda93c0726857517a24bbd to < fbe48f06e64134dfeafa89ad23387f66ebca3527affected462dbc9101acd38e92eda93c0726857517a24bbd to < a6d735100f602c830c16d69fb6d780eebd8c9ae1affected462dbc9101acd38e92eda93c0726857517a24bbd to < c000a3a330d97f6c073ace5aa5faf94b9adb4b79affected462dbc9101acd38e92eda93c0726857517a24bbd to < 5e28d5a3f774f118896aec17a3a20a9c5c9dfc64affected
Linux Linux
Default version status: affected
3.8affected0 to < 3.8unaffected5.4.297 to ≤ 5.4.*unaffected5.10.241 to ≤ 5.10.*unaffected5.15.190 to ≤ 5.15.*unaffected6.1.147 to ≤ 6.1.*unaffected6.6.100 to ≤ 6.6.*unaffected6.12.40 to ≤ 6.12.*unaffected6.15.8 to ≤ 6.15.*unaffected6.16 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/aa7a22c4d678bf649fd3a1d27debec583563414d ↗
- https://git.kernel.org/stable/c/d841aa5518508ab195b6781ad0d73ee378d713dd ↗
- https://git.kernel.org/stable/c/c6df794000147a3a02f79984aada4ce83f8d0a1e ↗
- https://git.kernel.org/stable/c/466e10194ab81caa2ee6a332d33ba16bcceeeba6 ↗
- https://git.kernel.org/stable/c/fbe48f06e64134dfeafa89ad23387f66ebca3527 ↗
- https://git.kernel.org/stable/c/a6d735100f602c830c16d69fb6d780eebd8c9ae1 ↗
- https://git.kernel.org/stable/c/c000a3a330d97f6c073ace5aa5faf94b9adb4b79 ↗
- https://git.kernel.org/stable/c/5e28d5a3f774f118896aec17a3a20a9c5c9dfc64 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html ↗