CVE-2023-52864
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.27% probability · 19th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/36d85fa7ae0d6be651c1a745191fa7ef055db43ePatch
- https://git.kernel.org/stable/c/44a96796d25809502c75771d40ee693c2e44724ePatch
- https://git.kernel.org/stable/c/9fb0eed09e1470cd4021ff52b2b9dfcbcee4c203Patch
- https://git.kernel.org/stable/c/cf098e937dd125c0317a0d6f261ac2a950a233d6Patch
- https://git.kernel.org/stable/c/d426a2955e45a95b2282764105fcfb110a540453Patch
- https://git.kernel.org/stable/c/e0bf076b734a2fab92d8fddc2b8b03462eee7097Patch
- https://git.kernel.org/stable/c/eba9ac7abab91c8f6d351460239108bef5e7a0b6Patch
- https://git.kernel.org/stable/c/fb7b06b59c6887659c6ed0ecd3110835eecbb6a3Patch
- https://git.kernel.org/stable/c/36d85fa7ae0d6be651c1a745191fa7ef055db43ePatch
- https://git.kernel.org/stable/c/44a96796d25809502c75771d40ee693c2e44724ePatch
- https://git.kernel.org/stable/c/9fb0eed09e1470cd4021ff52b2b9dfcbcee4c203Patch
- https://git.kernel.org/stable/c/cf098e937dd125c0317a0d6f261ac2a950a233d6Patch
- https://git.kernel.org/stable/c/d426a2955e45a95b2282764105fcfb110a540453Patch
- https://git.kernel.org/stable/c/e0bf076b734a2fab92d8fddc2b8b03462eee7097Patch
- https://git.kernel.org/stable/c/eba9ac7abab91c8f6d351460239108bef5e7a0b6Patch
- https://git.kernel.org/stable/c/fb7b06b59c6887659c6ed0ecd3110835eecbb6a3Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.