CVE-2022-48742: rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink()
First published: Thu Jun 20 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=3.14<4.9.300 | |
| Linux Linux kernel | >=4.10<4.14.265 | |
| Linux Linux kernel | >=4.15<4.19.228 | |
| Linux Linux kernel | >=4.20<5.4.177 | |
| Linux Linux kernel | >=5.5<5.10.97 | |
| Linux Linux kernel | >=5.11<5.15.20 | |
| Linux Linux kernel | >=5.16<5.16.6 |
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Reference Links
- https://git.kernel.org/stable/c/2cf180360d66bd657e606c1217e0e668e6faa303
- 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/3bbe2019dd12b8d13671ee6cda055d49637b4c39
- https://git.kernel.org/stable/c/def5e7070079b2a214b3b1a2fbec623e6fbfe34a
- https://git.kernel.org/stable/c/36a9a0aee881940476b254e0352581401b23f210
- https://git.kernel.org/stable/c/c6f6f2444bdbe0079e41914a35081530d0409963
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