CVE-2022-50097: linux kernel — Fix

Description

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().

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	2.6.21 — 4.14.291
linux	linux_kernel	4.15 — 4.19.256
linux	linux_kernel	4.20 — 5.4.211
linux	linux_kernel	5.5 — 5.10.137
linux	linux_kernel	5.11 — 5.15.61
linux	linux_kernel	5.16 — 5.18.18
linux	linux_kernel	5.19 — 5.19.2

References

Advisories & Patches

https://git.kernel.org/stable/c/3c35a0dc2b4e7acf24c796043b64fa3eee799239 https://git.kernel.org/stable/c/52461d387cc8c8f8dc40320caa2e9e101f73e7ba https://git.kernel.org/stable/c/574912261528589012b61f82d368256247c3a5a8 https://git.kernel.org/stable/c/5e0da18956d38e7106664dc1d06367b22f06edd3 https://git.kernel.org/stable/c/6ba592fa014f21f35a8ee8da4ca7b95a018f13e8 https://git.kernel.org/stable/c/ce50d94afcb8690813c5522f24cd38737657db81 https://git.kernel.org/stable/c/e2d7cacc6a2a1d77e7e20a492daf458a12cf19e0 https://git.kernel.org/stable/c/eacb50f1733660911827d7c3720f4c5425d0cdda

Frequently Asked Questions

What is CVE-2022-50097? +

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(). It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-50097? +

CVE-2022-50097 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2022-50097? +

CVE-2022-50097 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2022-50097? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2022-50097