CVE-2022-50097

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

HIGH

7.8

CVSS Score

Published: June 18, 2025 at 11:02 AM UTC

Updated: August 5, 2026 at 09:24 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

HIGH7.8

Exploit prediction

EPSS 0.2%

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().

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

2.6.21 ≤ v < 4.14.2912.6.21 ≤ v < 4.19.2562.6.21 ≤ v < 5.10.1372.6.21 ≤ v < 5.15.612.6.21 ≤ v < 5.18.182.6.21 ≤ v < 5.19.22.6.21 ≤ v < 5.4.2112.6.21 ≤ v < 6.04.15 ≤ v < 4.19.2564.20 ≤ v < 5.4.2115.11 ≤ v < 5.15.615.16 ≤ v < 5.18.185.19 ≤ v < 5.19.25.5 ≤ v < 5.10.1372.6.21a268422de8bf1b4c0cb97987b6c329c9f6a3da4b

Vendor states this is fixed in 3c35a0dc2b4e7acf24c796043b64fa3eee799239 (fixed)

Vendor states this is fixed in 52461d387cc8c8f8dc40320caa2e9e101f73e7ba (fixed)

Vendor states this is fixed in 574912261528589012b61f82d368256247c3a5a8 (fixed)

Vendor states this is fixed in 5e0da18956d38e7106664dc1d06367b22f06edd3 (fixed)

Vendor states this is fixed in 6ba592fa014f21f35a8ee8da4ca7b95a018f13e8 (fixed)

Vendor states this is fixed in ce50d94afcb8690813c5522f24cd38737657db81 (fixed)

Vendor states this is fixed in e2d7cacc6a2a1d77e7e20a492daf458a12cf19e0 (fixed)

Vendor states this is fixed in eacb50f1733660911827d7c3720f4c5425d0cdda (fixed)

Vendor states this is fixed in 2.6.21 (unaffected)

Vendor states this is fixed in 4.14.291 (unaffected)

Vendor states this is fixed in 4.19.256 (unaffected)

Vendor states this is fixed in 5.10.137 (unaffected)