CVE-2022-50101

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Source
https://cve.org/CVERecord?id=CVE-2022-50101
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50101.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-50101
Downstream
Related
Published
2025-06-18T11:02:37.297Z
Modified
2026-04-03T13:14:34.913801025Z
Summary
video: fbdev: vt8623fb: Check the size of screen before memset_io()
Details

In the Linux kernel, the following vulnerability has been resolved:

video: fbdev: vt8623fb: Check the size of screen before memset_io()

In the function vt8623fbsetpar(), the value of 'screensize' is calculated by the user input. If the user provides the improper value, the value of 'screensize' may larger than 'info->screen_size', which may cause the following bug:

[ 583.339036] BUG: unable to handle page fault for address: ffffc90005000000 [ 583.339049] #PF: supervisor write access in kernel mode [ 583.339052] #PF: errorcode(0x0002) - not-present page [ 583.339074] RIP: 0010:memsetorig+0x33/0xb0 [ 583.339110] Call Trace: [ 583.339118] vt8623fbsetpar+0x11cd/0x21e0 [ 583.339146] fbsetvar+0x604/0xeb0 [ 583.339181] dofbioctl+0x234/0x670 [ 583.339209] fb_ioctl+0xdd/0x130

Fix the this by checking the value of 'screensize' before memsetio().

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50101.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
558b7bd86c32978648cda5deb5c758d77ef0c165
Fixed
73280a184aa2e1a625ce54ce761042955cc79cd0
Fixed
52ad9bfeb8a0e62de30de6d39e8a49a72dd78150
Fixed
d71528ccdc7ae8d7500d414091d27805c51407a2
Fixed
bd8269e57621e5b38cc0b4bd2fa02e85c9f2a441
Fixed
4a3cef1eaced13ba9b55381d46bfad937a3dac2c
Fixed
b17caec5127bba6f90af92bcc85871df54548ac0
Fixed
c7a3f41e4b133d4dd25bc996b69039b19a34d69d
Fixed
ec0754c60217248fa77cc9005d66b2b55200ac06

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50101.json"