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().
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
558b7bd86c32978648cda5deb5c758d77ef0c165 to < 73280a184aa2e1a625ce54ce761042955cc79cd0affected558b7bd86c32978648cda5deb5c758d77ef0c165 to < 52ad9bfeb8a0e62de30de6d39e8a49a72dd78150affected558b7bd86c32978648cda5deb5c758d77ef0c165 to < d71528ccdc7ae8d7500d414091d27805c51407a2affected558b7bd86c32978648cda5deb5c758d77ef0c165 to < bd8269e57621e5b38cc0b4bd2fa02e85c9f2a441affected558b7bd86c32978648cda5deb5c758d77ef0c165 to < 4a3cef1eaced13ba9b55381d46bfad937a3dac2caffected558b7bd86c32978648cda5deb5c758d77ef0c165 to < b17caec5127bba6f90af92bcc85871df54548ac0affected558b7bd86c32978648cda5deb5c758d77ef0c165 to < c7a3f41e4b133d4dd25bc996b69039b19a34d69daffected558b7bd86c32978648cda5deb5c758d77ef0c165 to < ec0754c60217248fa77cc9005d66b2b55200ac06affected
Linux Linux
Default version status: affected
2.6.22affected0 to < 2.6.22unaffected4.14.291 to ≤ 4.14.*unaffected4.19.256 to ≤ 4.19.*unaffected5.4.211 to ≤ 5.4.*unaffected5.10.137 to ≤ 5.10.*unaffected5.15.61 to ≤ 5.15.*unaffected5.18.18 to ≤ 5.18.*unaffected5.19.2 to ≤ 5.19.*unaffected6.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/73280a184aa2e1a625ce54ce761042955cc79cd0 ↗
- https://git.kernel.org/stable/c/52ad9bfeb8a0e62de30de6d39e8a49a72dd78150 ↗
- https://git.kernel.org/stable/c/d71528ccdc7ae8d7500d414091d27805c51407a2 ↗
- https://git.kernel.org/stable/c/bd8269e57621e5b38cc0b4bd2fa02e85c9f2a441 ↗
- https://git.kernel.org/stable/c/4a3cef1eaced13ba9b55381d46bfad937a3dac2c ↗
- https://git.kernel.org/stable/c/b17caec5127bba6f90af92bcc85871df54548ac0 ↗
- https://git.kernel.org/stable/c/c7a3f41e4b133d4dd25bc996b69039b19a34d69d ↗
- https://git.kernel.org/stable/c/ec0754c60217248fa77cc9005d66b2b55200ac06 ↗