OESA-2026-3534

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-3534
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-3534.json
JSON Data
https://api.test.osv.dev/v1/vulns/OESA-2026-3534
Upstream
Published
2026-08-30T04:15:20Z
Modified
2026-08-30T04:31:34Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
ruby security update
Details

Ruby is a fast and easy interpreted scripting language for object-oriented programming. It has many functions for processing text Files and perform system management tasks (such as Perl).

Security Fix(es):

The attack vector is a potential Denial of Service (DoS). The vulnerability is caused by an insufficient check on the length of a decompressed domain name within a DNS packet.

An attacker can craft a malicious DNS packet containing a highly compressed domain name. When the resolv library parses such a packet, the name decompression process consumes a large amount of CPU resources, as the library does not limit the resulting length of the name.

This resource consumption can cause the application thread to become unresponsive, resulting in a Denial of Service condition.(CVE-2025-24294)

zlib is a Ruby interface for the zlib compression/decompression library. Versions 3.0.0 and below, 3.1.0, 3.1.1, 3.2.0 and 3.2.1 contain a buffer overflow vulnerability in the Zlib::GzipReader. The zstream_buffer_ungets function prepends caller-provided bytes ahead of previously produced output but fails to guarantee the backing Ruby string has enough capacity before the memmove shifts the existing data. This can lead to memory corruption when the buffer length exceeds capacity. This issue has been fixed in versions 3.0.1, 3.1.2 and 3.2.3.(CVE-2026-27820)

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

Affected packages

openEuler:24.03-LTS-SP1 / ruby

Package

Name
ruby
Purl
pkg:rpm/openEuler/ruby&distro=openEuler-24.03-LTS-SP1

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.2.2-157.oe2403sp1

Ecosystem specific 

{
    "aarch64": [
        "ruby-3.2.2-157.oe2403sp1.aarch64.rpm",
        "ruby-bundled-gems-3.2.2-157.oe2403sp1.aarch64.rpm",
        "ruby-debuginfo-3.2.2-157.oe2403sp1.aarch64.rpm",
        "ruby-debugsource-3.2.2-157.oe2403sp1.aarch64.rpm",
        "ruby-devel-3.2.2-157.oe2403sp1.aarch64.rpm",
        "rubygem-bigdecimal-3.1.3-157.oe2403sp1.aarch64.rpm",
        "rubygem-io-console-0.6.0-157.oe2403sp1.aarch64.rpm",
        "rubygem-json-2.6.3-157.oe2403sp1.aarch64.rpm",
        "rubygem-openssl-3.1.0-157.oe2403sp1.aarch64.rpm",
        "rubygem-psych-5.0.1-157.oe2403sp1.aarch64.rpm",
        "rubygem-rbs-2.8.2-157.oe2403sp1.aarch64.rpm"
    ],
    "noarch": [
        "ruby-help-3.2.2-157.oe2403sp1.noarch.rpm",
        "ruby-irb-3.2.2-157.oe2403sp1.noarch.rpm",
        "rubygem-did_you_mean-1.6.3-157.oe2403sp1.noarch.rpm",
        "rubygem-minitest-5.16.3-157.oe2403sp1.noarch.rpm",
        "rubygem-rake-13.0.6-157.oe2403sp1.noarch.rpm",
        "rubygem-rdoc-6.5.0-157.oe2403sp1.noarch.rpm",
        "rubygem-rexml-3.2.5-157.oe2403sp1.noarch.rpm",
        "rubygem-rss-0.2.9-157.oe2403sp1.noarch.rpm",
        "rubygem-test-unit-3.5.7-157.oe2403sp1.noarch.rpm",
        "rubygem-typeprof-0.21.3-157.oe2403sp1.noarch.rpm",
        "rubygems-3.4.10-157.oe2403sp1.noarch.rpm",
        "rubygems-devel-3.4.10-157.oe2403sp1.noarch.rpm"
    ],
    "src": [
        "ruby-3.2.2-157.oe2403sp1.src.rpm"
    ],
    "x86_64": [
        "ruby-3.2.2-157.oe2403sp1.x86_64.rpm",
        "ruby-bundled-gems-3.2.2-157.oe2403sp1.x86_64.rpm",
        "ruby-debuginfo-3.2.2-157.oe2403sp1.x86_64.rpm",
        "ruby-debugsource-3.2.2-157.oe2403sp1.x86_64.rpm",
        "ruby-devel-3.2.2-157.oe2403sp1.x86_64.rpm",
        "rubygem-bigdecimal-3.1.3-157.oe2403sp1.x86_64.rpm",
        "rubygem-io-console-0.6.0-157.oe2403sp1.x86_64.rpm",
        "rubygem-json-2.6.3-157.oe2403sp1.x86_64.rpm",
        "rubygem-openssl-3.1.0-157.oe2403sp1.x86_64.rpm",
        "rubygem-psych-5.0.1-157.oe2403sp1.x86_64.rpm",
        "rubygem-rbs-2.8.2-157.oe2403sp1.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-3534.json"