Use After Free Affecting kernel-modules package, versions <0:5.14.0-427.26.1.el9_4
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Test your applications- Snyk ID SNYK-ALMALINUX9-KERNELMODULES-8325896
- published 4 Nov 2024
- disclosed 17 Jul 2024
Introduced: 17 Jul 2024
CVE-2021-47596 Open this link in a new tabHow to fix?
Upgrade AlmaLinux:9 kernel-modules to version 0:5.14.0-427.26.1.el9_4 or higher.
This issue was patched in ALSA-2024:4583.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-modules package and not the kernel-modules package as distributed by AlmaLinux.
See How to fix? for AlmaLinux:9 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
net: hns3: fix use-after-free bug in hclgevf_send_mbx_msg
Currently, the hns3_remove function firstly uninstall client instance, and then uninstall acceletion engine device. The netdevice is freed in client instance uninstall process, but acceletion engine device uninstall process still use it to trace runtime information. This causes a use after free problem.
So fixes it by check the instance register state to avoid use after free.
References
- https://errata.almalinux.org/9/ALSA-2024-4583.html
- https://access.redhat.com/security/cve/CVE-2021-47596
- https://access.redhat.com/errata/RHSA-2024:4583
- https://git.kernel.org/stable/c/12512bc8f25b8ba9795dfbae0e9ca57ff13fd542
- https://git.kernel.org/stable/c/27cbf64a766e86f068ce6214f04c00ceb4db1af4
- https://git.kernel.org/stable/c/4f4a353f6fe033807cd026a5de81c67469ff19b0