CVE-2021-47474: comedi: vmk80xx: fix bulk-buffer overflow

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-22 · updated 2026-06-17
Weakness: CWE-787

Description

In the Linux kernel, the following vulnerability has been resolved: comedi: vmk80xx: fix bulk-buffer overflow The driver is using endpoint-sized buffers but must not assume that the tx and rx buffers are of equal size or a malicious device could overflow the slab-allocated receive buffer when doing bulk transfers.

Affected products

Linux kernel: from 2.6.31 before 4.4.292; from 4.5 before 4.9.290; from 4.10 before 4.14.255; from 4.15 before 4.19.217; from 4.20 before 5.4.159; from 5.5 before 5.10.79 — fixed in 4.14.255, 4.19.217, 4.4.292, 4.9.290, 5.10.79, 5.14.18

How to fix

Upgrade to a fixed version: Linux kernel 4.14.255, 4.19.217, 4.4.292, 4.9.290. Check the vendor advisory for mitigations.

References

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