CVE-2022-50101
BaseFortify
Publication date: 2025-06-18
Last updated on: 2025-11-19
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | From 5.15.160 (inc) to 5.16 (inc) |
| linux | linux_kernel | From 5.15.160 (inc) to 5.16 (inc) |
| linux | linux_kernel | From 5.15.160 (inc) to 5.16 (inc) |
| linux | linux_kernel | From 5.15.160 (inc) to 5.16 (inc) |
| linux | linux_kernel | From 5.15.160 (inc) to 5.16 (inc) |
| linux | linux_kernel | From 5.15.160 (inc) to 5.16 (inc) |
| linux | linux_kernel | From 5.15.160 (inc) to 5.16 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-NVD-CWE-noinfo |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability occurs in the Linux kernel's video framebuffer driver vt8623fb. The function vt8623fb_set_par() calculates a 'screen_size' value based on user input without proper validation. If a user provides an improper (too large) value for 'screen_size', it can exceed the actual allocated screen size, leading to a kernel page fault when the system attempts to write beyond the valid memory area during a memset_io() operation. This can cause the kernel to crash or behave unpredictably. The fix involves checking the 'screen_size' value before performing the memory operation to prevent out-of-bounds access.
How can this vulnerability impact me? :
This vulnerability can lead to a kernel crash or instability due to an invalid memory access triggered by improper user input. An attacker could exploit this to cause a denial of service (system crash) or potentially execute arbitrary code in kernel mode, compromising system security and stability.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
Detection of this vulnerability can be done by monitoring the system logs for kernel page fault errors related to vt8623fb, such as messages containing 'BUG: unable to handle page fault' and 'vt8623fb_set_par'. You can use commands like 'dmesg | grep vt8623fb' or 'journalctl -k | grep vt8623fb' to check for these error messages.
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation involves updating the Linux kernel to a version where the vulnerability is fixed, specifically one that includes the patch checking the 'screen_size' value before calling memset_io() in vt8623fb_set_par(). Until then, avoid using or exposing the vulnerable framebuffer device to untrusted users to prevent exploitation.