OESA-2026-3222

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-3222
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-3222.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-3222
Upstream
Published
2026-08-01T11:12:05Z
Modified
2026-08-18T01:21:26Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
libssh2 security update
Details

libssh2 is a library implementing the SSH2 protocol as defined by Internet Drafts: SECSH-TRANS(22), SECSH-USERAUTH(25), SECSH-CONNECTION(23), SECSH-ARCH(20), SECSH-FILEXFER(06)*, SECSH-DHGEX(04), and SECSH-NUMBERS(10).

Security Fix(es):

libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSH_MSG_EXT_INFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can set nr_extensions to 0xFFFFFFFF during key exchange, causing the client to spin in a tight CPU loop for over 60 seconds because return values from _libssh2_get_string() are unchecked and the session timeout does not apply to CPU-bound loops.(CVE-2026-55199)

Database specific 
{
    "severity": "High"
}
References

Affected packages

openEuler:24.03-LTS-SP4 / libssh2

Package

Name
libssh2
Purl
pkg:rpm/openEuler/libssh2&distro=openEuler-24.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.11.0-8.oe2403sp4

Ecosystem specific 

{
    "aarch64": [
        "libssh2-1.11.0-8.oe2403sp4.aarch64.rpm",
        "libssh2-debuginfo-1.11.0-8.oe2403sp4.aarch64.rpm",
        "libssh2-debugsource-1.11.0-8.oe2403sp4.aarch64.rpm",
        "libssh2-devel-1.11.0-8.oe2403sp4.aarch64.rpm"
    ],
    "noarch": [
        "libssh2-help-1.11.0-8.oe2403sp4.noarch.rpm"
    ],
    "src": [
        "libssh2-1.11.0-8.oe2403sp4.src.rpm"
    ],
    "x86_64": [
        "libssh2-1.11.0-8.oe2403sp4.x86_64.rpm",
        "libssh2-debuginfo-1.11.0-8.oe2403sp4.x86_64.rpm",
        "libssh2-debugsource-1.11.0-8.oe2403sp4.x86_64.rpm",
        "libssh2-devel-1.11.0-8.oe2403sp4.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-3222.json"