5.5

CVE-2021-47495: linux Divide By Zero

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2021-47495DEBIAN-CVE-2021-47495
Published 22-05-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2021-47495 is a medium (CVSS 5.5) Divide By Zero vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.9% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 15 · Related 11
RHSA-2024:4211RHSA-2024:4352RHSA-2024:9315RHSA-2025:8248SUSE-SU-2024:1979-1SUSE-SU-2024:1983-1

Timeline

  1. 22-05-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

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

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

0.00 pp

From 0.21% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.21%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu88 products
  • linuxAll versions (No fix recorded) | < 4.15.0-167.175 | < 5.4.0-92.103
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1119.127 | < 5.4.0-1061.64
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b9eba0a4a527e04d712f0e0401e5391ef124b33e | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 524f333e98138d909a0a0c574a9ff6737dce2767 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 74b3b27cf9fecce00cd8918b7882fd81191d0aa4 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 002d82227c0abe29118cf80f7e2f396b22d448ed | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 492140e45d2bf27c1014243f8616a9b612144e20 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 693ecbe8f799405f8775719deedb1f76265d375a | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 7e8b6a4f18edee070213cb6a77118e8a412253c5 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 397430b50a363d8b7bdda00522123f82df6adc5e | 2.6.12
  • linux_kernel< 4.4.291 | ≥ 4.5, < 4.9.289 | ≥ 4.10, < 4.14.254 | ≥ 4.15, < 4.19.215 | ≥ 4.20, < 5.4.157 | ≥ 5.5, < 5.10.77 | ≥ 5.11, < 5.14.16 | 5.15:rc1 | 5.15:rc2 | 5.15:rc3 | 5.15:rc4 | 5.15:rc5 | 5.15:rc6
Debian1 product
  • linux< 5.14.16-1

3 vendors · 91 products

References

12 links
Show all 12 references