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OpenSSL CVE-2025-5987

| EUVDEUVD-2025-20227 HIGH
Return of Wrong Status Code (CWE-393)
2025-07-07 secalert@redhat.com
8.1
CVSS 3.1 · Vendor: redhat
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Severity by source

Vendor (redhat) PRIMARY
8.1 HIGH
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
qualitative
SUSE
HIGH
qualitative
Red Hat
8.1 MEDIUM
qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
EUVD ID Assigned
Mar 16, 2026 - 03:37 euvd
EUVD-2025-20227
Analysis Generated
Mar 16, 2026 - 03:37 vuln.today
CVE Published
Jul 07, 2025 - 15:15 nvd
HIGH 8.1

DescriptionCVE.org

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with the SSH_OK code, resulting in libssh not properly detecting the error returned by the OpenSSL library. This issue can lead to undefined behavior, including compromised data confidentiality and integrity or crashes.

AnalysisAI

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library.

Technical ContextAI

A denial of service vulnerability allows an attacker to disrupt the normal functioning of a system, making it unavailable to legitimate users. This vulnerability is classified as Return of Wrong Status Code (CWE-393).

RemediationAI

Implement rate limiting and input validation. Use timeout mechanisms for resource-intensive operations. Deploy DDoS protection where applicable.

CVE-2014-0160 HIGH POC
7.5 Apr 07

The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packe

CVE-2014-0195 MEDIUM POC
6.8 Jun 05

The dtls1_reassemble_fragment function in d1_both.c in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0

CVE-2014-0224 HIGH POC
7.4 Jun 05

OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly restrict processing of ChangeCiph

CVE-2016-0800 MEDIUM POC
5.9 Mar 01

The SSLv2 protocol, as used in OpenSSL before 1.0.1s and 1.0.2 before 1.0.2g and other products, requires a server to se

CVE-2015-0204 MEDIUM POC
4.3 Jan 09

The ssl3_get_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k

CVE-2014-3566 LOW POC
3.4 Oct 15

The SSL protocol 3.0, as used in OpenSSL through 1.0.1i and other products, uses nondeterministic CBC padding, which mak

CVE-2016-2107 MEDIUM POC
5.9 May 05

The AES-NI implementation in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h does not consider memory allocation during a

CVE-2015-1793 MEDIUM POC
6.5 Jul 09

The X509_verify_cert function in crypto/x509/x509_vfy.c in OpenSSL 1.0.1n, 1.0.1o, 1.0.2b, and 1.0.2c does not properly

CVE-2022-3602 HIGH
7.5 Nov 01

A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Rated hig

CVE-2014-3470 MEDIUM
4.3 Jun 05

The ssl3_send_client_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before

CVE-2017-3730 HIGH POC
7.5 May 04

In OpenSSL 1.1.0 before 1.1.0d, if a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this

CVE-2016-8610 HIGH
7.5 Nov 13

A denial of service flaw was found in OpenSSL 0.9.8, 1.0.1, 1.0.2 through 1.0.2h, and 1.1.0 in the way the TLS/SSL proto

Vendor StatusVendor

Ubuntu

Priority: Medium
libssh
Release Status Version
noble released 0.10.6-2ubuntu0.1
oracular released 0.10.6-3ubuntu1.1
plucky released 0.11.1-1ubuntu0.1
upstream released 0.11.2
bionic not-affected code not present
focal not-affected code not present
jammy not-affected code not present
xenial not-affected code not present

Debian

Bug #1108407
libssh
Release Status Fixed Version Urgency
bullseye not-affected - -
bullseye (security) fixed 0.9.8-0+deb11u2 -
bookworm fixed 0.10.6-0+deb12u2 -
bookworm (security) vulnerable 0.10.6-0+deb12u1 -
trixie fixed 0.11.2-1+deb13u1 -
forky fixed 0.11.3-1 -
sid fixed 0.12.0-1 -
(unstable) fixed 0.11.2-1 -

SUSE

Severity: High
Product Status
Container suse/sl-micro/6.1/baremetal-os-container:2.2.1-7.2 Container suse/sl-micro/6.1/base-os-container:2.2.1-5.27 Container suse/sl-micro/6.1/kvm-os-container:2.2.1-5.29 Container suse/sl-micro/6.1/rt-os-container:2.2.1-5.14 Image SL-Micro Image SL-Micro-Azure Image SL-Micro-BYOS-Azure Image SL-Micro-BYOS-EC2 Image SL-Micro-BYOS-GCE Image SL-Micro-Base Image SL-Micro-Base-RT Image SL-Micro-Base-RT-SelfInstall Image SL-Micro-Base-RT-encrypted Image SL-Micro-Base-SelfInstall Image SL-Micro-Base-encrypted Image SL-Micro-Base-qcow Image SL-Micro-Default Image SL-Micro-Default-SelfInstall Image SL-Micro-Default-encrypted Image SL-Micro-Default-qcow Image SL-Micro-EC2 Image SLE-Micro Image SLE-Micro-Azure Image SLE-Micro-BYOS Image SLE-Micro-BYOS-Azure Image SLE-Micro-BYOS-EC2 Image SLE-Micro-BYOS-GCE Image SLE-Micro-EC2 Image SLE-Micro-GCE Image SUSE-Multi-Linux-Manager-Proxy-BYOS-Azure Image SUSE-Multi-Linux-Manager-Proxy-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Proxy-BYOS-GCE Image SUSE-Multi-Linux-Manager-Server-Azure-llc Image SUSE-Multi-Linux-Manager-Server-Azure-ltd Image SUSE-Multi-Linux-Manager-Server-BYOS-Azure Image SUSE-Multi-Linux-Manager-Server-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Server-BYOS-GCE Image SUSE-Multi-Linux-Manager-Server-EC2-llc Image SUSE-Multi-Linux-Manager-Server-EC2-ltd Affected
SUSE Liberty Linux 9 Fixed
SUSE Linux Enterprise Server 16.0 Fixed
SUSE Linux Micro 6.0 Fixed
SUSE Linux Micro 6.1 Fixed

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CVE-2025-5987 vulnerability details – vuln.today

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