High severity8.1OSV Advisory· Published Jul 7, 2025· Updated Jun 30, 2026
CVE-2025-5987
CVE-2025-5987
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
19- osv-coords16 versionspkg:apk/chainguard/libsshpkg:apk/chainguard/libssh-devpkg:apk/chainguard/libssh2pkg:apk/chainguard/libssh2-devpkg:apk/chainguard/libssh2-docpkg:apk/wolfi/libsshpkg:apk/wolfi/libssh-devpkg:apk/wolfi/libssh2pkg:apk/wolfi/libssh2-devpkg:apk/wolfi/libssh2-docpkg:rpm/almalinux/libsshpkg:rpm/almalinux/libssh-configpkg:rpm/almalinux/libssh-develpkg:rpm/opensuse/libssh&distro=openSUSE%20Tumbleweedpkg:rpm/suse/libssh&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/libssh&distro=SUSE%20Linux%20Micro%206.1
< 0.11.3-r0+ 15 more
- (no CPE)range: < 0.11.3-r0
- (no CPE)range: < 0.11.3-r0
- (no CPE)range: < 1.11.1-r1
- (no CPE)range: < 1.11.1-r1
- (no CPE)range: < 1.11.1-r1
- (no CPE)range: < 0.11.3-r0
- (no CPE)range: < 0.11.3-r0
- (no CPE)range: < 1.11.1-r1
- (no CPE)range: < 1.11.1-r1
- (no CPE)range: < 1.11.1-r1
- (no CPE)range: < 0.10.4-17.el9_7
- (no CPE)range: < 0.10.4-17.el9_7
- (no CPE)range: < 0.10.4-17.el9_7
- (no CPE)range: < 0.11.2-1.1
- (no CPE)range: < 0.10.6-2.1
- (no CPE)range: < 0.10.6-slfo.1.1_2.1
Patches
Vulnerability mechanics
References
17- access.redhat.com/security/cve/CVE-2025-5987nvdThird Party Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingThird Party Advisory
- access.redhat.com/errata/RHSA-2025:23483nvd
- access.redhat.com/errata/RHSA-2025:23484nvd
- access.redhat.com/errata/RHSA-2026:0427nvd
- access.redhat.com/errata/RHSA-2026:0428nvd
- access.redhat.com/errata/RHSA-2026:0430nvd
- access.redhat.com/errata/RHSA-2026:0431nvd
- access.redhat.com/errata/RHSA-2026:0702nvd
- access.redhat.com/errata/RHSA-2026:0978nvd
- access.redhat.com/errata/RHSA-2026:0980nvd
- access.redhat.com/errata/RHSA-2026:0985nvd
- access.redhat.com/errata/RHSA-2026:0996nvd
- access.redhat.com/errata/RHSA-2026:1539nvd
- access.redhat.com/errata/RHSA-2026:1541nvd
- access.redhat.com/errata/RHSA-2026:3415nvd
- www.libssh.org/security/advisories/CVE-2025-5987.txtnvd
News mentions
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