NULL Pointer Dereference Affecting kernel-modules package, versions <0:4.18.0-477.70.1.el8_8
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Test your applications- Snyk ID SNYK-RHEL8-KERNELMODULES-7894231
- published 4 Sep 2024
- disclosed 21 May 2024
Introduced: 21 May 2024
CVE-2021-47385 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-modules to version 0:4.18.0-477.70.1.el8_8 or higher.
This issue was patched in RHSA-2024:6206.
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 RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
hwmon: (w83792d) Fix NULL pointer dereference by removing unnecessary structure field
If driver read val value sufficient for (val & 0x08) && (!(val & 0x80)) && ((val & 0x7) == ((val >> 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 multipline alignment]
References
- https://access.redhat.com/security/cve/CVE-2021-47385
- https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278
- https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3
- https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1
- https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3