CVE-2021-47495

MEDIUM
Published May 22, 2024 Modified Sep 29, 2025 CWE-369

Description

In the Linux kernel, the following vulnerability has been resolved: usbnet: sanity check for maxpacket maxpacket of 0 makes no sense and oopses as we need to divide by it. Give up. V2: fixed typo in log and stylistic issues

Is your site exposed to CVE-2021-47495?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-369 CWE-369

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/002d82227c0abe29118cf80f7e2f396b22d448ed https://git.kernel.org/stable/c/397430b50a363d8b7bdda00522123f82df6adc5e https://git.kernel.org/stable/c/492140e45d2bf27c1014243f8616a9b612144e20 https://git.kernel.org/stable/c/524f333e98138d909a0a0c574a9ff6737dce2767 https://git.kernel.org/stable/c/693ecbe8f799405f8775719deedb1f76265d375a https://git.kernel.org/stable/c/74b3b27cf9fecce00cd8918b7882fd81191d0aa4 https://git.kernel.org/stable/c/7e8b6a4f18edee070213cb6a77118e8a412253c5 https://git.kernel.org/stable/c/b9eba0a4a527e04d712f0e0401e5391ef124b33e https://git.kernel.org/stable/c/002d82227c0abe29118cf80f7e2f396b22d448ed https://git.kernel.org/stable/c/397430b50a363d8b7bdda00522123f82df6adc5e https://git.kernel.org/stable/c/492140e45d2bf27c1014243f8616a9b612144e20 https://git.kernel.org/stable/c/524f333e98138d909a0a0c574a9ff6737dce2767 https://git.kernel.org/stable/c/693ecbe8f799405f8775719deedb1f76265d375a https://git.kernel.org/stable/c/74b3b27cf9fecce00cd8918b7882fd81191d0aa4 https://git.kernel.org/stable/c/7e8b6a4f18edee070213cb6a77118e8a412253c5 https://git.kernel.org/stable/c/b9eba0a4a527e04d712f0e0401e5391ef124b33e

Frequently Asked Questions

What is CVE-2021-47495? +
In the Linux kernel, the following vulnerability has been resolved: usbnet: sanity check for maxpacket maxpacket of 0 makes no sense and oopses as we need to divide by it. Give up. V2: fixed typo in log and stylistic issues It has a CVSS v3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2021-47495? +
CVE-2021-47495 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2021-47495? +
CVE-2021-47495 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2021-47495? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-4637

Divide By Zero vulnerability in davisking dlib allows remote attackers to cause a denial of service via a crafted file. …
CVE-2025-54873

RISC Zero is a zero-knowledge verifiable general computing platform based on zk-STARKs and the RISC-V microarchitecture. RISC packages risc0-zkvm versions …
CVE-2026-19025

H5O__layout_decode in H5Olayout.c in HDF5 through 2.3.0 does not validate that a chunked dataset's stored chunk-layout dimensionality matches its dataspace …
CVE-2026-37232 8.6

An issue was discovered in OpenAirInterface5G 2.4.0 (nr-softmodem) in the E2SM-KPM RAN Function's PRB utilization metric calculation. The functions fill_RRU_PrbTotDl() …
CVE-2024-26945 8.4

In the Linux kernel, the following vulnerability has been resolved: crypto: iaa - Fix nr_cpus < nr_iaa case If nr_cpus …
CVE-2024-4785 7.6

BT: Missing Check in LL_CONNECTION_UPDATE_IND Packet Leads to Division by Zero

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2021-47495 — free, no signup required.