CVE-2021-47476
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.
Does this matter?
Lower severity and a low EPSS score (0.39%). Track it; it rarely justifies an emergency change on its own.
Description
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 ni6501_port_command() and ni6501_counter_command() if a (malicious) device has smaller max-packet sizes than expected (or when doing descriptor fuzz testing). Add the missing sanity checks to probe().
- CVSS 3.1
- 4.6 MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.39% probability · 32th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/4a9d43cb5d5f39fa39fc1da438517004cc95f7eaPatch
- https://git.kernel.org/stable/c/58478143771b20ab219937b1c30a706590a59224Patch
- https://git.kernel.org/stable/c/907767da8f3a925b060c740e0b5c92ea7dbec440Patch
- https://git.kernel.org/stable/c/aa39738423503825625853b643b9e99d11c23816Patch
- https://git.kernel.org/stable/c/b0156b7c9649d8f55a2ce3d3258509f1b2a181c3Patch
- https://git.kernel.org/stable/c/bc51111bf6e8e7b6cc94b133e4c291273a16acd1Patch
- https://git.kernel.org/stable/c/d6a727a681a39ae4f73081a9bedb45d14f95bdd1Patch
- https://git.kernel.org/stable/c/df7b1238f3b599a0b9284249772cdfd1ea83a632Patch
- https://git.kernel.org/stable/c/ef143dc0c3defe56730ecd3a9de7b3e1d7e557c1Patch
- https://git.kernel.org/stable/c/4a9d43cb5d5f39fa39fc1da438517004cc95f7eaPatch
- https://git.kernel.org/stable/c/58478143771b20ab219937b1c30a706590a59224Patch
- https://git.kernel.org/stable/c/907767da8f3a925b060c740e0b5c92ea7dbec440Patch
- https://git.kernel.org/stable/c/aa39738423503825625853b643b9e99d11c23816Patch
- https://git.kernel.org/stable/c/b0156b7c9649d8f55a2ce3d3258509f1b2a181c3Patch
- https://git.kernel.org/stable/c/bc51111bf6e8e7b6cc94b133e4c291273a16acd1Patch
- https://git.kernel.org/stable/c/d6a727a681a39ae4f73081a9bedb45d14f95bdd1Patch
- https://git.kernel.org/stable/c/df7b1238f3b599a0b9284249772cdfd1ea83a632Patch
- https://git.kernel.org/stable/c/ef143dc0c3defe56730ecd3a9de7b3e1d7e557c1Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.