CVE-2023-52864: platform/x86: wmi: Fix opening of char device
First published: Tue May 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: platform/x86: wmi: Fix opening of char device Since commit fa1f68db6ca7 ("drivers: misc: pass miscdevice pointer via file private data"), the miscdevice stores a pointer to itself inside filp->private_data, which means that private_data will not be NULL when wmi_char_open() is called. This might cause memory corruption should wmi_char_open() be unable to find its driver, something which can happen when the associated WMI device is deleted in wmi_free_devices(). Fix the problem by using the miscdevice pointer to retrieve the WMI device data associated with a char device using container_of(). This also avoids wmi_char_open() picking a wrong WMI device bound to a driver with the same name as the original driver.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <4.19.299 | 4.19.299 |
| redhat/kernel | <5.4.261 | 5.4.261 |
| redhat/kernel | <5.10.201 | 5.10.201 |
| redhat/kernel | <5.15.139 | 5.15.139 |
| redhat/kernel | <6.1.63 | 6.1.63 |
| redhat/kernel | <6.5.12 | 6.5.12 |
| redhat/kernel | <6.6.2 | 6.6.2 |
| redhat/kernel | <6.7 | 6.7 |
| IBM Security Verify Governance - Identity Manager | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Software Stack | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Virtual Appliance | <=ISVG 10.0.2 | |
| IBM Security Verify Governance Identity Manager Container | <=ISVG 10.0.2 |
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Reference Links
- https://git.kernel.org/stable/c/36d85fa7ae0d6be651c1a745191fa7ef055db43e
- https://git.kernel.org/stable/c/44a96796d25809502c75771d40ee693c2e44724e
- https://git.kernel.org/stable/c/9fb0eed09e1470cd4021ff52b2b9dfcbcee4c203
- https://git.kernel.org/stable/c/cf098e937dd125c0317a0d6f261ac2a950a233d6
- https://git.kernel.org/stable/c/d426a2955e45a95b2282764105fcfb110a540453
- https://git.kernel.org/stable/c/e0bf076b734a2fab92d8fddc2b8b03462eee7097
- https://git.kernel.org/stable/c/eba9ac7abab91c8f6d351460239108bef5e7a0b6
- https://git.kernel.org/stable/c/fb7b06b59c6887659c6ed0ecd3110835eecbb6a3
- https://access.redhat.com/security/cve/CVE-2023-52864
- https://lore.kernel.org/linux-cve-announce/2024052118-CVE-2023-52864-15cd@gregkh/T
- https://access.redhat.com/errata/RHSA-2024:5102
- https://access.redhat.com/errata/RHSA-2024:5101
- https://access.redhat.com/errata/RHSA-2024:5365
- https://access.redhat.com/errata/RHSA-2024:5364
- https://access.redhat.com/errata/RHSA-2024:5363
- https://access.redhat.com/errata/RHSA-2024:5692
- https://access.redhat.com/errata/RHSA-2024:6993
- https://bugzilla.redhat.com/show_bug.cgi?id=2282719
- https://www.ibm.com/support/pages/node/7230443 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2023-52864?
CVE-2023-52864 has been classified as a medium severity vulnerability.
How do I fix CVE-2023-52864?
To address CVE-2023-52864, update the kernel to one of the following versions: 4.19.299, 5.4.261, 5.10.201, 5.15.139, 6.1.63, 6.5.12, 6.6.2, or 6.7.
Which Linux distributions are affected by CVE-2023-52864?
CVE-2023-52864 affects various distributions that utilize the affected versions of the Linux kernel provided by Red Hat.
What components does CVE-2023-52864 impact?
CVE-2023-52864 impacts the WMI char device in the Linux kernel.
Is there a workaround for CVE-2023-52864?
There are no known workarounds for CVE-2023-52864; applying the recommended kernel updates is the suggested solution.
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