rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink()
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:
rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink()
While looking at one unrelated syzbot bug, I found the replay logic
in __rtnl_newlink() to potentially trigger use-after-free.
It is better to clear master_dev and m_ops inside the loop,
in case we have to replay it.
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/2cf180360d66bd657e606c1217e0e668e6faa303https://git.kernel.org/stable/c/36a9a0aee881940476b254e0352581401b23f210https://git.kernel.org/stable/c/3bbe2019dd12b8d13671ee6cda055d49637b4c39https://git.kernel.org/stable/c/7d9211678c0f0624f74cdff36117ab8316697bb8https://git.kernel.org/stable/c/a01e60a1ec6bef9be471fb7182a33c6d6f124e93https://git.kernel.org/stable/c/bd43771ee9759dd9dfae946bff190e2c5a120de5https://git.kernel.org/stable/c/c6f6f2444bdbe0079e41914a35081530d0409963https://git.kernel.org/stable/c/def5e7070079b2a214b3b1a2fbec623e6fbfe34a