7.5

CVE-2021-3580: debian debian_linux Improper Input Validation

CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2021-3580SUSE-SU-2021:2135-1SUSE-SU-2021:2143-1
Published 05-08-2021Last modified 14-10-2026
Open JSON

Vulnerability summary

CVE-2021-3580 is a high (CVSS 7.5) Improper Input Validation vulnerability in debian debian_linux. EPSS estimates a 2.71% chance of exploitation in the next 30 days, higher than 85.7% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
2.71%
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 5 · Related 3
DLA-2760-1DSA-4933-1MGASA-2021-0300RHSA-2021:4451USN-4990-1CGA-7XMC-XGJJ-C9WJ

Timeline

  1. 05-08-2021
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

Description

A flaw was found in the way nettle's RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to provide a manipulated ciphertext leading to application crash and denial of service.

CVSS metrics

7 scores · 6 sources · 2 versions

EPSS trend

Probability

2.71%

Chance of exploitation in the next 30 days

Percentile

86%

Versus all other CVEs

30-day change

0.00 pp

From 2.71% on 18-09-2026

18-09-202618-10-2026
EPSS score
2.71%

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

Suse30 products
  • libnettle&distro=HPE Helion OpenStack 8< 2.7.1-13.6.1
  • libnettle&distro=SUSE Enterprise Storage 6< 3.4.1-4.18.1
  • libnettle&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS< 3.4.1-4.18.1
  • libnettle&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS< 3.4.1-4.18.1
  • libnettle&distro=SUSE Linux Enterprise High Performance Computing 15-ESPOS< 3.4.1-4.18.1
Debian2 products
Opensuse2 products
  • libnettle&distro=openSUSE Leap 15.2< 3.4.1-lp152.4.6.1
  • libnettle&distro=openSUSE Leap 15.3< 3.4.1-4.18.1
Alpine1 product
  • nettle< 3.5.1-r2 | < 3.7.3-r0
Chainguard1 product
  • nettleAll versions (No fix recorded)
Netapp1 product
Nettle_project1 product
Redhat1 product
Ubuntu1 product
  • nettleAll versions (No fix recorded) | < 3.4.1-0ubuntu0.18.04.1 | < 3.5.1+really3.5.1-2ubuntu0.2
Wolfi1 product
  • nettleAll versions (No fix recorded)

10 vendors · 41 products

References

17 links
Show all 17 references