7.8

CVE-2022-50097

video: fbdev: s3fb: Check the size of screen before memset_io()

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

video: fbdev: s3fb: Check the size of screen before memset_io()

In the function s3fb_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:

[   54.083733] BUG: unable to handle page fault for address: ffffc90003000000
[   54.083742] #PF: supervisor write access in kernel mode
[   54.083744] #PF: error_code(0x0002) - not-present page
[   54.083760] RIP: 0010:memset_orig+0x33/0xb0
[   54.083782] Call Trace:
[   54.083788]  s3fb_set_par+0x1ec6/0x4040
[   54.083806]  fb_set_var+0x604/0xeb0
[   54.083836]  do_fb_ioctl+0x234/0x670

Fix the this by checking the value of 'screen_size' before memset_io().
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 2.6.21 < 4.14.291
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.256
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.211
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.137
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.61
Linux ≫ Linux Kernel Version >= 5.16 < 5.18.18
Linux ≫ Linux Kernel Version >= 5.19 < 5.19.2
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.17% 0.065
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/574912261528589012b61f82d368256247c3a5a8
Patch
https://git.kernel.org/stable/c/3c35a0dc2b4e7acf24c796043b64fa3eee799239
Patch
https://git.kernel.org/stable/c/eacb50f1733660911827d7c3720f4c5425d0cdda
Patch
https://git.kernel.org/stable/c/5e0da18956d38e7106664dc1d06367b22f06edd3
Patch
https://git.kernel.org/stable/c/ce50d94afcb8690813c5522f24cd38737657db81
Patch
https://git.kernel.org/stable/c/52461d387cc8c8f8dc40320caa2e9e101f73e7ba
Patch
https://git.kernel.org/stable/c/e2d7cacc6a2a1d77e7e20a492daf458a12cf19e0
Patch
https://git.kernel.org/stable/c/6ba592fa014f21f35a8ee8da4ca7b95a018f13e8
Patch