Use After Free Affecting kernel-core package, versions *
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Test your applications- Snyk ID SNYK-RHEL9-KERNELCORE-7739172
- published 21 Aug 2024
- disclosed 17 Aug 2024
Introduced: 17 Aug 2024
CVE-2024-43830 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:9 kernel-core.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-core package and not the kernel-core package as distributed by RHEL.
See How to fix? for RHEL:9 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
leds: trigger: Unregister sysfs attributes before calling deactivate()
Triggers which have trigger specific sysfs attributes typically store related data in trigger-data allocated by the activate() callback and freed by the deactivate() callback.
Calling device_remove_groups() after calling deactivate() leaves a window where the sysfs attributes show/store functions could be called after deactivation and then operate on the just freed trigger-data.
Move the device_remove_groups() call to before deactivate() to close this race window.
This also makes the deactivation path properly do things in reverse order of the activation path which calls the activate() callback before calling device_add_groups().
References
- https://access.redhat.com/security/cve/CVE-2024-43830
- https://git.kernel.org/stable/c/0788a6f3523d3686a9eed5ea1e6fcce6841277b2
- https://git.kernel.org/stable/c/734ba6437e80dfc780e9ee9d95f912392d12b5ea
- https://git.kernel.org/stable/c/c0dc9adf9474ecb7106e60e5472577375aedaed3
- https://git.kernel.org/stable/c/cb8aa9d2a4c8a15d6a43ccf901ef3d094aa60374
- https://git.kernel.org/stable/c/09c1583f0e10c918855d6e7540a79461a353e5d6
- https://git.kernel.org/stable/c/3fb6a9d67cfd812a547ac73ec02e1077c26c640d
- https://git.kernel.org/stable/c/c3b7a650c8717aa89df318364609c86cbc040156
- https://git.kernel.org/stable/c/d1415125b701ef13370e2761f691ec632a5eb93a