CVE-2022-50101
- Source
- https://nvd.nist.gov/vuln/detail/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
- Related
- Published
- 2025-06-18T11:15:39Z
- Modified
- 2025-06-18T16:48:22.141166Z
- Downstream
- Summary
- [none]
- 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().
- References
-
- https://git.kernel.org/stable/c/4a3cef1eaced13ba9b55381d46bfad937a3dac2c
- https://git.kernel.org/stable/c/52ad9bfeb8a0e62de30de6d39e8a49a72dd78150
- https://git.kernel.org/stable/c/73280a184aa2e1a625ce54ce761042955cc79cd0
- https://git.kernel.org/stable/c/b17caec5127bba6f90af92bcc85871df54548ac0
- https://git.kernel.org/stable/c/bd8269e57621e5b38cc0b4bd2fa02e85c9f2a441
- https://git.kernel.org/stable/c/c7a3f41e4b133d4dd25bc996b69039b19a34d69d
- https://git.kernel.org/stable/c/d71528ccdc7ae8d7500d414091d27805c51407a2
- https://git.kernel.org/stable/c/ec0754c60217248fa77cc9005d66b2b55200ac06
- https://security-tracker.debian.org/tracker/CVE-2022-50101
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed5.10.140-1
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source