7.5

CVE-2020-22218: libssh2 Out-of-bounds Write

Modified
AliasesSUSE-SU-2023:3555-1SUSE-SU-2023:3738-1RHSA-2023:5615
Published 22-08-2023Last modified 14-10-2026

Vulnerability summary

CVE-2020-22218 is a high (CVSS 7.5) Out-of-bounds Write vulnerability in libssh2. EPSS estimates a 1.16% chance of exploitation in the next 30 days, higher than 67% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
1.16%
0%100%
Low · +0.06 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 1
DLA-3559-1

Timeline

  1. 22-08-2023
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

Description

An issue was discovered in function _libssh2_packet_add in libssh2 1.10.0 allows attackers to access out of bounds memory.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

1.16%

Chance of exploitation in the next 30 days

Percentile

67%

Versus all other CVEs

30-day change

Increase +0.06 pp

From 1.10% 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.

Suse23 products
  • libssh2_org&distro=SUSE Enterprise Storage 7< 1.9.0-150000.4.16.1
  • libssh2_org&distro=SUSE Enterprise Storage 7.1< 1.9.0-150000.4.16.1
  • libssh2_org&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS< 1.9.0-150000.4.16.1
  • libssh2_org&distro=SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS< 1.9.0-150000.4.16.1
  • libssh2_org&distro=SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS< 1.9.0-150000.4.16.1
Redhat4 products
  • libssh2< 0:1.8.0-4.el7_9.1
  • libssh2-debuginfo< 0:1.8.0-4.el7_9.1
  • libssh2-devel< 0:1.8.0-4.el7_9.1
  • libssh2-docs< 0:1.8.0-4.el7_9.1
Opensuse2 products
  • libssh2_org&distro=openSUSE Leap 15.4< 1.9.0-150000.4.16.1
  • libssh2_org&distro=openSUSE Leap 15.5< 1.9.0-150000.4.16.1
Debian1 product
  • libssh2< 1.10.0-2
Libssh21 product
Ubuntu1 product
  • libssh2< 1.4.3-2ubuntu0.2+esm3 | < 1.5.0-2ubuntu0.1+esm2 | < 1.8.0-1ubuntu0.1 | < 1.8.0-2.1ubuntu0.1

6 vendors · 32 products

References

18 links
Show all 18 references