CVE-2025-5987 (GCVE-0-2025-5987)

Vulnerability from cvelistv5 – Published: 2025-07-07 14:24 – Updated: 2026-06-25 05:04
VLAI
Title
Libssh: invalid return code for chacha20 poly1305 with openssl backend
Summary
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.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-393 - Return of Wrong Status Code
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2025:23483 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:23484 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0427 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0428 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0430 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0431 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0702 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0978 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0980 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0985 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:0996 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:1539 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:1541 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3415 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2025-5987 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2376219 issue-trackingx_refsource_REDHAT
https://www.libssh.org/security/advisories/CVE-20…
Impacted products
Vendor Product Version
Affected: 0.10.0 , < 0.11.2 (semver)
Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:0.11.1-5.el10_1 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.1
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Unaffected: 0:0.11.1-4.el10_0.1 , < * (rpm)
    cpe:/o:redhat:enterprise_linux_eus:10.0
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:0.10.4-17.el9_7 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/o:redhat:enterprise_linux:9::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:0.10.4-9.el9_2.2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2::appstream
    cpe:/o:redhat:rhel_e4s:9.2::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support Unaffected: 0:0.10.4-13.el9_4.2 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.4::appstream
    cpe:/o:redhat:rhel_eus:9.4::baseos
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:0.10.4-15.el9_6.1 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6::appstream
    cpe:/o:redhat:rhel_eus:9.6::baseos
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4.13 Unaffected: 413.92.202602240113-0 , < * (rpm)
    cpe:/a:redhat:openshift:4.13::el9
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4.14 Unaffected: 414.92.202601191325-0 , < * (rpm)
    cpe:/a:redhat:openshift:4.14::el9
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4.15 Unaffected: 415.92.202601271320-0 , < * (rpm)
    cpe:/a:redhat:openshift:4.15::el9
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4.16 Unaffected: 416.94.202601160124-0 , < * (rpm)
    cpe:/a:redhat:openshift:4.16::el9
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4.17 Unaffected: 417.94.202601120213-0 , < * (rpm)
    cpe:/a:redhat:openshift:4.17::el9
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4.18 Unaffected: 418.94.202601202224-0 , < * (rpm)
    cpe:/a:redhat:openshift:4.18::el9
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4.19 Unaffected: 4.19.9.6.202601260820-0 , < * (rpm)
    cpe:/a:redhat:openshift:4.19::el9
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4.20 Unaffected: 4.20.9.6.202601211057-0 , < * (rpm)
    cpe:/a:redhat:openshift:4.20::el9
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
 Create a notification for this product.
Red Hat Red Hat In-Vehicle Operating System 1     cpe:/o:redhat:rhivos:1
 Create a notification for this product.
Date Public
2025-04-26 00:00
Show details on NVD website
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\"https://access.redhat.com/errata/RHSA-2026:0996\", \"name\": \"RHSA-2026:0996\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:1539\", \"name\": \"RHSA-2026:1539\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:1541\", \"name\": \"RHSA-2026:1541\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:3415\", \"name\": \"RHSA-2026:3415\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/security/cve/CVE-2025-5987\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2376219\", \"name\": \"RHBZ#2376219\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://www.libssh.org/security/advisories/CVE-2025-5987.txt\"}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-393\", \"description\": \"Return of Wrong Status Code\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2026-06-25T05:04:05.691Z\"}, \"x_redhatCweChain\": \"CWE-393: Return of Wrong Status Code\"}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-5987\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-25T05:04:05.691Z\", \"dateReserved\": \"2025-06-10T21:55:45.552Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2025-07-07T14:24:12.576Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.