CVE-2022-50101

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().

Reserved 2025-06-18 | Published 2025-06-18 | Updated 2025-06-18 | Assigner Linux

Product status

Default status
unaffected

558b7bd86c32978648cda5deb5c758d77ef0c165 before 73280a184aa2e1a625ce54ce761042955cc79cd0
affected

558b7bd86c32978648cda5deb5c758d77ef0c165 before 52ad9bfeb8a0e62de30de6d39e8a49a72dd78150
affected

558b7bd86c32978648cda5deb5c758d77ef0c165 before d71528ccdc7ae8d7500d414091d27805c51407a2
affected

558b7bd86c32978648cda5deb5c758d77ef0c165 before bd8269e57621e5b38cc0b4bd2fa02e85c9f2a441
affected

558b7bd86c32978648cda5deb5c758d77ef0c165 before 4a3cef1eaced13ba9b55381d46bfad937a3dac2c
affected

558b7bd86c32978648cda5deb5c758d77ef0c165 before b17caec5127bba6f90af92bcc85871df54548ac0
affected

558b7bd86c32978648cda5deb5c758d77ef0c165 before c7a3f41e4b133d4dd25bc996b69039b19a34d69d
affected

558b7bd86c32978648cda5deb5c758d77ef0c165 before ec0754c60217248fa77cc9005d66b2b55200ac06
affected

Default status
affected

2.6.22
affected

Any version before 2.6.22
unaffected

4.14.291
unaffected

4.19.256
unaffected

5.4.211
unaffected

5.10.137
unaffected

5.15.61
unaffected

5.18.18
unaffected

5.19.2
unaffected

6.0
unaffected

References

git.kernel.org/...c/73280a184aa2e1a625ce54ce761042955cc79cd0

git.kernel.org/...c/52ad9bfeb8a0e62de30de6d39e8a49a72dd78150

git.kernel.org/...c/d71528ccdc7ae8d7500d414091d27805c51407a2

git.kernel.org/...c/bd8269e57621e5b38cc0b4bd2fa02e85c9f2a441

git.kernel.org/...c/4a3cef1eaced13ba9b55381d46bfad937a3dac2c

git.kernel.org/...c/b17caec5127bba6f90af92bcc85871df54548ac0

git.kernel.org/...c/c7a3f41e4b133d4dd25bc996b69039b19a34d69d

git.kernel.org/...c/ec0754c60217248fa77cc9005d66b2b55200ac06

cve.org (CVE-2022-50101)

nvd.nist.gov (CVE-2022-50101)

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