rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink()
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.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/2cf180360d66bd657e606c1217e0e668e6faa303
- https://git.kernel.org/stable/c/36a9a0aee881940476b254e0352581401b23f210
- https://git.kernel.org/stable/c/3bbe2019dd12b8d13671ee6cda055d49637b4c39
- https://git.kernel.org/stable/c/7d9211678c0f0624f74cdff36117ab8316697bb8
- https://git.kernel.org/stable/c/a01e60a1ec6bef9be471fb7182a33c6d6f124e93
- https://git.kernel.org/stable/c/bd43771ee9759dd9dfae946bff190e2c5a120de5
- https://git.kernel.org/stable/c/c6f6f2444bdbe0079e41914a35081530d0409963
- https://git.kernel.org/stable/c/def5e7070079b2a214b3b1a2fbec623e6fbfe34a
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48742.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-48742