Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 462dbc9101acd38e92eda93c0726857517a24bbd before 71d84658a61322e5630c85c5388fc25e4a2d08b2; affected 462dbc9101acd38e92eda93c0726857517a24bbd before 99fc137f178797204d36ac860dd8b31e35baa2df; affected 462dbc9101acd38e92eda93c0726857517a24bbd before 1bed56f089f09b465420bf23bb32985c305cfc28; affected 462dbc9101acd38e92eda93c0726857517a24bbd before 3c2a8994807623c7655ece205667ae2cf74940aa; affected 462dbc9101acd38e92eda93c0726857517a24bbd before 6ffa9d66187188e3068b5a3895e6ae1ee34f9199; affected 462dbc9101acd38e92eda93c0726857517a24bbd before 6ff8e74c8f8a68ec07ef837b95425dfe900d060f; affected 462dbc9101acd38e92eda93c0726857517a24bbd before dd831ac8221e691e9e918585b1003c7071df0379 |
| Linux / Linux | affected 3.8; unaffected 0 before 3.8; unaffected 5.4.302 through 5.4.*; unaffected 5.10.247 through 5.10.*; unaffected 5.15.197 through 5.15.*; unaffected 6.1.159 through 6.1.*; unaffected 6.6.116 through 6.6.*; unaffected 6.12.57 through 6.12.*; unaffected 6.16 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/71d84658a61322e5630c85c5388fc25e4a2d08b2
- https://git.kernel.org/stable/c/99fc137f178797204d36ac860dd8b31e35baa2df
- https://git.kernel.org/stable/c/1bed56f089f09b465420bf23bb32985c305cfc28
- https://git.kernel.org/stable/c/3c2a8994807623c7655ece205667ae2cf74940aa
- https://git.kernel.org/stable/c/6ffa9d66187188e3068b5a3895e6ae1ee34f9199
- https://git.kernel.org/stable/c/6ff8e74c8f8a68ec07ef837b95425dfe900d060f
- https://git.kernel.org/stable/c/dd831ac8221e691e9e918585b1003c7071df0379
ADP enrichment
No English description supplied.
No references supplied.