Memory Leak Affecting bpftool package, versions *
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Test your applications- Snyk ID SNYK-CENTOS8-BPFTOOL-6983594
- published 22 May 2024
- disclosed 21 May 2024
Introduced: 21 May 2024
CVE-2021-47339 Open this link in a new tabHow to fix?
There is no fixed version for Centos:8 bpftool.
NVD Description
Note: Versions mentioned in the description apply only to the upstream bpftool package and not the bpftool package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
media: v4l2-core: explicitly clear ioctl input data
As seen from a recent syzbot bug report, mistakes in the compat ioctl implementation can lead to uninitialized kernel stack data getting used as input for driver ioctl handlers.
The reported bug is now fixed, but it's possible that other related bugs are still present or get added in the future. As the drivers need to check user input already, the possible impact is fairly low, but it might still cause an information leak.
To be on the safe side, always clear the entire ioctl buffer before calling the conversion handler functions that are meant to initialize them.