CVE-2022-50099

video: fbdev: arkfb: 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 0.3%

Description

In the Linux kernel, the following vulnerability has been resolved: video: fbdev: arkfb: Check the size of screen before memset_io() In the function arkfb_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: [ 659.399066] BUG: unable to handle page fault for address: ffffc90003000000 [ 659.399077] #PF: supervisor write access in kernel mode [ 659.399079] #PF: error_code(0x0002) - not-present page [ 659.399094] RIP: 0010:memset_orig+0x33/0xb0 [ 659.399116] Call Trace: [ 659.399122] arkfb_set_par+0x143f/0x24c0 [ 659.399130] fb_set_var+0x604/0xeb0 [ 659.399161] do_fb_ioctl+0x234/0x670 [ 659.399189] fb_ioctl+0xdd/0x130 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%

2.6.22 ≤ v < 4.14.2912.6.22 ≤ v < 4.19.2562.6.22 ≤ v < 5.10.1372.6.22 ≤ v < 5.15.612.6.22 ≤ v < 5.18.182.6.22 ≤ v < 5.19.22.6.22 ≤ v < 5.4.2112.6.22 ≤ 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 < 5.10.1372.6.22681e14730c73cc2c71af282c001de6bc71c22f00

Vendor states this is fixed in 0701df594bc1d7ae55fed407fb65dd90a93f8a9c (fixed)

Vendor states this is fixed in 09e733d6ac948e6fda4b16252e44ea46f98fc8b4 (fixed)

Vendor states this is fixed in 2ce61c39c2a0b8ec82f48e0f7136f0dac105ae75 (fixed)

Vendor states this is fixed in 352305ea50d682b8e081d826da53caf9e744d7d0 (fixed)

Vendor states this is fixed in 4a20c5510aa2c031a096a58deb356e91609781c9 (fixed)

Vendor states this is fixed in 53198b81930e567ad6b879812d88052a1e8ac79e (fixed)

Vendor states this is fixed in 8bcb1a06e3091716b7cbebe0e91d1de9895068cd (fixed)

Vendor states this is fixed in 96b550971c65d54d64728d8ba973487878a06454 (fixed)

Vendor states this is fixed in 2.6.22 (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)