CVE-2020-22218
CVE-2020-22218 is a high-severity vulnerability in Libssh2 with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- EPSS exploit prediction: 1% (56th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Libssh2
- Published:
- Last modified:
Description
An issue was discovered in function _libssh2_packet_add in libssh2 1.10.0 allows attackers to access out of bounds memory.
Frequently asked questions
- What is CVE-2020-22218?
- An issue was discovered in function _libssh2_packet_add in libssh2 1.10.0 allows attackers to access out of bounds memory.
- How severe is CVE-2020-22218?
- CVE-2020-22218 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2020-22218 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-22218?
- CVE-2020-22218 affects Libssh2. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-22218?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2020-22218 published?
- CVE-2020-22218 was published on 2023-08-22 and last updated on 2026-06-17.
References
- https://github.com/libssh2/libssh2/pull/476
- https://lists.debian.org/debian-lts-announce/2023/09/msg00006.html
- https://security.netapp.com/advisory/ntap-20231006-0002/
Affected products (1)
- cpe:2.3:a:libssh2:libssh2:1.10.0:*:*:*:*:*:*:*
More vulnerabilities in Libssh2
- CVE-2019-3859 — Critical (CVSS 9.1): An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the _libssh2_packet_require and…
- CVE-2019-3857 — High (CVSS 8.8): An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way…
- CVE-2019-3856 — High (CVSS 8.8): An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way…
- CVE-2019-3855 — High (CVSS 8.8): An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way…
- CVE-2026-55200 — High (CVSS 8.1): libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2_transport_read()…
- CVE-2019-17498 — High (CVSS 8.1): In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds…
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