CVE-2022-50355: staging: vt6655: fix some erroneous memory clean-up loops

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-09-17 · updated 2026-08-04
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: staging: vt6655: fix some erroneous memory clean-up loops In some initialization functions of this driver, memory is allocated with 'i' acting as an index variable and increasing from 0. The commit in "Fixes" introduces some clean-up codes in case of allocation failure, which free memory in reverse order with 'i' decreasing to 0. However, there are some problems: - The case i=0 is left out. Thus memory is leaked. - In case memory allocation fails right from the start, the memory freeing loops will start with i=-1 and invalid memory locations will be accessed. One of these loops has been fixed in commit c8ff91535880 ("staging: vt6655: fix potential memory leak"). Fix the remaining erroneous loops.

Affected products

Linux kernel: from 4.18 before 4.19.262; from 4.20 before 5.4.220; from 5.5 before 5.10.150; from 5.11 before 5.15.75; from 5.16 before 5.19.17; from 6.0 before 6.0.3 — fixed in 4.19.262, 5.10.150, 5.15.75, 5.19.17, 5.4.220, 6.0.3

How to fix

Upgrade to a fixed version: Linux kernel 4.19.262, 5.10.150, 5.15.75, 5.19.17. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2022-50355 or the next vulnerability affects your stack