CVE-2021-47476
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47476
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47476.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-47476
- Downstream
- Related
- Published
- 2024-05-22T09:15:09Z
- Modified
- 2025-08-09T20:01:28Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
comedi: ni_usb6501: fix NULL-deref in command paths
The driver uses endpoint-sized USB transfer buffers but had no sanity checks on the sizes. This can lead to zero-size-pointer dereferences or overflowed transfer buffers in ni6501portcommand() and ni6501countercommand() if a (malicious) device has smaller max-packet sizes than expected (or when doing descriptor fuzz testing).
Add the missing sanity checks to probe().
- References
-
- https://git.kernel.org/stable/c/4a9d43cb5d5f39fa39fc1da438517004cc95f7ea
- https://git.kernel.org/stable/c/58478143771b20ab219937b1c30a706590a59224
- https://git.kernel.org/stable/c/907767da8f3a925b060c740e0b5c92ea7dbec440
- https://git.kernel.org/stable/c/aa39738423503825625853b643b9e99d11c23816
- https://git.kernel.org/stable/c/b0156b7c9649d8f55a2ce3d3258509f1b2a181c3
- https://git.kernel.org/stable/c/bc51111bf6e8e7b6cc94b133e4c291273a16acd1
- https://git.kernel.org/stable/c/d6a727a681a39ae4f73081a9bedb45d14f95bdd1
- https://git.kernel.org/stable/c/df7b1238f3b599a0b9284249772cdfd1ea83a632
- https://git.kernel.org/stable/c/ef143dc0c3defe56730ecd3a9de7b3e1d7e557c1