6.5

CVE-2021-37750: debian debian_linux NULL Pointer Dereference

CVSS: 6.5v3.1MediumModified
AliasesALPINE-CVE-2021-37750SUSE-SU-2021:3454-1SUSE-SU-2021:3454-2
Published 23-08-2021Last modified 14-10-2026
Open JSON

Vulnerability summary

CVE-2021-37750 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 2.50% chance of exploitation in the next 30 days, higher than 84.5% of scored vulnerabilities.

Overall risk
27/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
2.50%
0%100%
Low · +0.34 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-2771-1OPENSUSE-SU-2024:10899-1RHSA-2021:3576SUSE-SU-2022:4154-1USN-5959-1

Timeline

  1. 23-08-2021
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

Description

The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.5 and 1.19.x before 1.19.3 has a NULL pointer dereference in kdc/do_tgs_req.c via a FAST inner body that lacks a server field.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

2.50%

Chance of exploitation in the next 30 days

Percentile

85%

Versus all other CVEs

30-day change

+0.34 pp

From 2.17% on 19-09-2026

19-09-202619-10-2026
EPSS score
2.50%

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

Redhat9 products
  • krb5< 0:1.15.1-51.el7_9
  • krb5-debuginfo< 0:1.15.1-51.el7_9
  • krb5-devel< 0:1.15.1-51.el7_9
  • krb5-libs< 0:1.15.1-51.el7_9
  • krb5-pkinit< 0:1.15.1-51.el7_9
Suse9 products
  • krb5&distro=SUSE Linux Enterprise Micro 5.0< 1.16.3-3.24.1
  • krb5&distro=SUSE Linux Enterprise Micro 5.1< 1.16.3-3.24.1
  • krb5&distro=SUSE Linux Enterprise Module for Basesystem 15 SP2< 1.16.3-3.24.1
  • krb5&distro=SUSE Linux Enterprise Module for Basesystem 15 SP3< 1.16.3-3.24.1
  • krb5&distro=SUSE Linux Enterprise Module for Server Applications 15 SP2< 1.16.3-3.24.1
Opensuse3 products
  • krb5-mini&distro=openSUSE Leap 15.2< 1.16.3-lp152.5.22.1
  • krb5&distro=openSUSE Leap 15.2< 1.16.3-lp152.5.22.1
  • krb5&distro=openSUSE Leap 15.3< 1.16.3-3.24.1
Debian2 products
Alpine1 product
  • krb5< 1.18.5-r0 | < 1.19.3-r0
Fedoraproject1 product
Mit1 product
Oracle1 product
Starwindsoftware1 product
Ubuntu1 product
  • krb5< 1.16-2ubuntu0.4 | < 1.17-6ubuntu4.3

10 vendors · 29 products

References

27 links
Show all 27 references