CVE-2022-48742

HIGH
Published Jun 20, 2024 Modified Nov 21, 2024 CWE-416

Description

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.

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CVSS v3.1 Score

7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

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://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

Frequently Asked Questions

What is CVE-2022-48742? +
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. It has a CVSS v3.1 base score of 7.8 (HIGH).
How severe is CVE-2022-48742? +
CVE-2022-48742 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2022-48742? +
CVE-2022-48742 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2022-48742? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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