net/sched: taprio: always validate TCA_TAPRIO_ATTR_PRIOMAP
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.3%
exploitation probability
0.3%top 81% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
net/sched: taprio: always validate TCA_TAPRIO_ATTR_PRIOMAP
If one TCA_TAPRIO_ATTR_PRIOMAP attribute has been provided,
taprio_parse_mqprio_opt() must validate it, or userspace
can inject arbitrary data to the kernel, the second time
taprio_change() is called.
First call (with valid attributes) sets dev->num_tc
to a non zero value.
Second call (with arbitrary mqprio attributes)
returns early from taprio_parse_mqprio_opt()
and bad things can happen.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://cert-portal.siemens.com/productcert/html/ssa-265688.htmlhttps://cert-portal.siemens.com/productcert/html/ssa-355557.htmlhttps://cert-portal.siemens.com/productcert/html/ssa-613116.htmlhttps://git.kernel.org/stable/c/0bf6cc96612bd396048f57d63f1ad454a846e39chttps://git.kernel.org/stable/c/6db4af09987cc5d5f0136bd46148b0e0460dae5bhttps://git.kernel.org/stable/c/724050ae4b76e4fae05a923cb54101d792cf4404https://git.kernel.org/stable/c/c37a27a35eadb59286c9092c49c241270c802ae2https://git.kernel.org/stable/c/c6041e7124464ce7e896ee3f912897ce88a0c4echttps://git.kernel.org/stable/c/d3dde4c217f0c31ab0621912e682b57e677dd923https://git.kernel.org/stable/c/f921a58ae20852d188f70842431ce6519c4fdc36