net/sched: sch_qfq: do not free existing class in qfq_change_class()
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.2%
exploitation probability
0.2%top 86% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
net/sched: sch_qfq: do not free existing class in qfq_change_class()
Fixes qfq_change_class() error case.
cl->qdisc and cl should only be freed if a new class and qdisc
were allocated, or we risk various UAF.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/0a234660dc70ce45d771cbc76b20d925b73ec160https://git.kernel.org/stable/c/2a64fb9b47afffeb5dbab5fd3a518e1436dcc90ehttps://git.kernel.org/stable/c/362e269bb03f7076ba9990e518aeddb898232e50https://git.kernel.org/stable/c/3879cffd9d07aa0377c4b8835c4f64b4fb24ac78https://git.kernel.org/stable/c/cff6cd703f41d8071995956142729e4bba160363https://git.kernel.org/stable/c/e9d8f11652fa08c647bf7bba7dd8163241a332cdhttps://git.kernel.org/stable/c/f06f7635499bc806cbe2bbc8805c7cef8b1edddf