In the Linux kernel, the following vulnerability has been resolved:
net/sched: sch_qfq: Fix null-deref in agg_dequeue
To prevent a potential crash in agg_dequeue (net/sched/sch_qfq.c)
when cl->qdisc->ops->peek(cl->qdisc) returns NULL, we check the return
value before using it, similar to the existing approach in sch_hfsc.c.
To avoid code duplication, the following changes are made:
1. Changed qdisc_warn_nonwc(include/net/pkt_sched.h) into a static
inline function.
2. Moved qdisc_peek_len from net/sched/sch_hfsc.c to
include/net/pkt_sched.h so that sch_qfq can reuse it.
3. Applied qdisc_peek_len in agg_dequeue to avoid crashing.
462dbc9101acd38e92eda93c0726857517a24bbd builds before 71d84658a61322e5630c85c5388fc25e4a2d08b2; 462dbc9101acd38e92eda93c0726857517a24bbd builds before 99fc137f178797204d36ac860dd8b31e35baa2df; 462dbc9101acd38e92eda93c0726857517a24bbd builds before 1bed56f089f09b465420bf23bb32985c305cfc28; 462dbc9101acd38e92eda93c0726857517a24bbd builds before 3c2a8994807623c7655ece205667ae2cf74940aa; 462dbc9101acd38e92eda93c0726857517a24bbd builds before 6ffa9d66187188e3068b5a3895e6ae1ee34f9199; 462dbc9101acd38e92eda93c0726857517a24bbd builds before 6ff8e74c8f8a68ec07ef837b95425dfe900d060f; from 462dbc9101acd38e92eda93c0726857517a24bbd before dd831ac8221e691e9e918585b1003c7071df0379
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.
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