CVE-2022-50101
video: fbdev: vt8623fb: Check the size of screen before memset_io()
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: video: fbdev: vt8623fb: Check the size of screen before memset_io() In the function vt8623fb_set_par(), the value of 'screen_size' is calculated by the user input. If the user provides the improper value, the value of 'screen_size' 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: error_code(0x0002) - not-present page [ 583.339074] RIP: 0010:memset_orig+0x33/0xb0 [ 583.339110] Call Trace: [ 583.339118] vt8623fb_set_par+0x11cd/0x21e0 [ 583.339146] fb_set_var+0x604/0xeb0 [ 583.339181] do_fb_ioctl+0x234/0x670 [ 583.339209] fb_ioctl+0xdd/0x130 Fix the this by checking the value of 'screen_size' before memset_io().
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.27% · top 81% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 558b7bd86c32978648cda5deb5c758d77ef0c165 – < 73280a184aa2e1a625ce54ce761042955cc79cd0
- affected 558b7bd86c32978648cda5deb5c758d77ef0c165 – < 52ad9bfeb8a0e62de30de6d39e8a49a72dd78150
- affected 558b7bd86c32978648cda5deb5c758d77ef0c165 – < d71528ccdc7ae8d7500d414091d27805c51407a2
- affected 558b7bd86c32978648cda5deb5c758d77ef0c165 – < bd8269e57621e5b38cc0b4bd2fa02e85c9f2a441
- affected 558b7bd86c32978648cda5deb5c758d77ef0c165 – < 4a3cef1eaced13ba9b55381d46bfad937a3dac2c
- affected 558b7bd86c32978648cda5deb5c758d77ef0c165 – < b17caec5127bba6f90af92bcc85871df54548ac0
- affected 558b7bd86c32978648cda5deb5c758d77ef0c165 – < c7a3f41e4b133d4dd25bc996b69039b19a34d69d
- affected 558b7bd86c32978648cda5deb5c758d77ef0c165 – < ec0754c60217248fa77cc9005d66b2b55200ac06
- affected 2.6.22
- unaffected < 2.6.22
- unaffected 4.14.291 – ≤ 4.14.*
- unaffected 4.19.256 – ≤ 4.19.*
- unaffected 5.4.211 – ≤ 5.4.*
- unaffected 5.10.137 – ≤ 5.10.*
- unaffected 5.15.61 – ≤ 5.15.*
- unaffected 5.18.18 – ≤ 5.18.*
- unaffected 5.19.2 – ≤ 5.19.*
- unaffected 6.0 – ≤ *
References (8)
- https://git.kernel.org/stable/c/73280a184aa2e1a625ce54ce761042955cc79cd0 (opens in a new tab)
- https://git.kernel.org/stable/c/52ad9bfeb8a0e62de30de6d39e8a49a72dd78150 (opens in a new tab)
- https://git.kernel.org/stable/c/d71528ccdc7ae8d7500d414091d27805c51407a2 (opens in a new tab)
- https://git.kernel.org/stable/c/bd8269e57621e5b38cc0b4bd2fa02e85c9f2a441 (opens in a new tab)
- https://git.kernel.org/stable/c/4a3cef1eaced13ba9b55381d46bfad937a3dac2c (opens in a new tab)
- https://git.kernel.org/stable/c/b17caec5127bba6f90af92bcc85871df54548ac0 (opens in a new tab)
- https://git.kernel.org/stable/c/c7a3f41e4b133d4dd25bc996b69039b19a34d69d (opens in a new tab)
- https://git.kernel.org/stable/c/ec0754c60217248fa77cc9005d66b2b55200ac06 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2022-50101)Record last updated .