7.5

CVE-2021-36386: fedoraproject fedora Missing Initialization of Resource

Modified
AliasesMGASA-2021-0391SUSE-SU-2021:2771-1SUSE-SU-2021:2791-1
Published 29-07-2021Last modified 04-08-2024

Vulnerability summary

CVE-2021-36386 is a high (CVSS 7.5) Missing Initialization of Resource vulnerability in fedoraproject fedora. EPSS estimates a 2.56% chance of exploitation in the next 30 days, higher than 85.1% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 3% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
2.56%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 4
OPENSUSE-SU-2021:1591-1OPENSUSE-SU-2021:4018-1OPENSUSE-SU-2024:10753-1RHSA-2022:1964SUSE-SU-2021:4018-1

Timeline

  1. 29-07-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf va_list argument, which might allow mail servers to cause a denial of service or possibly have unspecified other impact via long error messages. NOTE: it is unclear whether use of Fetchmail on any realistic platform results in an impact beyond an inconvenience to the client user.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

2.56%

Chance of exploitation in the next 30 days

Percentile

85%

Versus all other CVEs

30-day change

No change 0.00 pp

From 2.56% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Suse28 products
  • fetchmail&distro=SUSE Enterprise Storage 6< 6.3.26-20.14.1
  • fetchmail&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS< 6.3.26-20.14.1
  • fetchmail&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS< 6.3.26-20.14.1
  • fetchmail&distro=SUSE Linux Enterprise High Performance Computing 15-ESPOS< 6.3.26-20.14.1
  • fetchmail&distro=SUSE Linux Enterprise High Performance Computing 15-LTSS< 6.3.26-20.14.1
Opensuse2 products
  • fetchmail&distro=openSUSE Leap 15.2< 6.3.26-lp152.6.6.1
  • fetchmail&distro=openSUSE Leap 15.3< 6.3.26-20.14.1
Alpine1 product
  • fetchmail< 6.4.20-r0
Debian1 product
  • fetchmail< 6.4.16-4
Fedoraproject1 product
Fetchmail1 product
Mageia1 product
  • fetchmail< 6.4.8-4.1.mga8
Ubuntu1 product
  • fetchmailAll versions (No fix recorded)

8 vendors · 36 products

References

25 links
Show all 25 references