CVE-2021-47384 Affecting kernel-debug-core package, versions <0:4.18.0-477.74.1.el8_8
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGCORE-8085343
- published 24 Sep 2024
- disclosed 21 May 2024
Introduced: 21 May 2024
CVE-2021-47384 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug-core to version 0:4.18.0-477.74.1.el8_8 or higher.
This issue was patched in RHSA-2024:6993.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-core package and not the kernel-debug-core package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
hwmon: (w83793) Fix NULL pointer dereference by removing unnecessary structure field
If driver read tmp value sufficient for (tmp & 0x08) && (!(tmp & 0x80)) && ((tmp & 0x7) == ((tmp >> 4) & 0x7)) from device then Null pointer dereference occurs. (It is possible if tmp = 0b0xyz1xyz, where same literals mean same numbers) Also lm75[] does not serve a purpose anymore after switching to devm_i2c_new_dummy_device() in w83791d_detect_subclients().
The patch fixes possible NULL pointer dereference by removing lm75[].
Found by Linux Driver Verification project (linuxtesting.org).
[groeck: Dropped unnecessary continuation lines, fixed multi-line alignments]
References
- https://access.redhat.com/security/cve/CVE-2021-47384
- https://git.kernel.org/stable/c/6cb01fe630eaffc5a2c3f7364436caddba286623
- https://git.kernel.org/stable/c/746011193f44f97f8784edcf8327c587946745fc
- https://git.kernel.org/stable/c/7c4fd5de39f273626a2b0f3a446d2cc85cd47616
- https://git.kernel.org/stable/c/dd4d747ef05addab887dc8ff0d6ab9860bbcd783