An update for ruby is now available for openEuler-24.03-LTS-SP4 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-3536 Final 1.0 1.0 2026-08-30 Initial 2026-08-30 2026-08-30 openEuler SA Tool V1.0 2026-08-30 ruby security update An update for ruby is now available for openEuler-24.03-LTS-SP4 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) Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, several Net::IMAP commands accept a "raw data" argument that is sent verbatim after validation to prevent command injection. However, if a server does not support non-synchronizing literals, it may still be possible to inject arbitrary IMAP commands inside non-synchronizing literals. A server without support for non-synchronizing literals may interpret the "+}\r\n" as the end of a malformed command line and respond with a tagged BAD. In that case, the contents of the literal will be interpreted as one or more new pipelined commands, allowing a CRLF command injection attack to succeed. This affects criteria for #search and #uid_search; search_keys for #sort, #thread, #uid_sort, and #uid_thread; and attr for #fetch and #uid_fetch. This vulnerability is fixed in 0.6.5 and 0.5.15.(CVE-2026-47240) Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, several Net::IMAP commands accept a raw string argument which is only validated to prevent CRLF injection and then sent verbatim. If this string is derived from user-controlled input, an attacker can force the next command to be absorbed as a continuation of the first command. This will cause the first command to eventually fail, but also prevents it from returning until another command is sent (from another thread). That other command will not return until the connection is closed. This vulnerability is fixed in 0.6.5 and 0.5.15.(CVE-2026-47241) Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, when Net::IMAP#id is called with a hash argument, although the ID field value strings are correctly quoted (escaping quoted specials), they were not validated to prohibit CRLF sequences. While Net::IMAP#enable does process its arguments for aliases, it does not validate them as valid atoms (or as a list of valid atoms). The #to_s value is sent verbatim. Arguments to either command could be used by an attacker to inject arbitrary IMAP commands. This vulnerability is fixed in 0.6.5 and 0.5.15.(CVE-2026-47242) An update for ruby is now available for openEuler-24.03-LTS-SP4. openEuler Security has rated this update as having a security impact of critical. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. Critical ruby https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3536 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2025-24294 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-27820 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-47240 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-47241 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-47242 https://nvd.nist.gov/vuln/detail/CVE-2025-24294 https://nvd.nist.gov/vuln/detail/CVE-2026-27820 https://nvd.nist.gov/vuln/detail/CVE-2026-47240 https://nvd.nist.gov/vuln/detail/CVE-2026-47241 https://nvd.nist.gov/vuln/detail/CVE-2026-47242 openEuler-24.03-LTS-SP4 ruby-3.2.2-158.oe2403sp4.aarch64.rpm ruby-bundled-gems-3.2.2-158.oe2403sp4.aarch64.rpm ruby-debuginfo-3.2.2-158.oe2403sp4.aarch64.rpm ruby-debugsource-3.2.2-158.oe2403sp4.aarch64.rpm ruby-devel-3.2.2-158.oe2403sp4.aarch64.rpm rubygem-bigdecimal-3.1.3-158.oe2403sp4.aarch64.rpm rubygem-io-console-0.6.0-158.oe2403sp4.aarch64.rpm rubygem-json-2.6.3-158.oe2403sp4.aarch64.rpm rubygem-openssl-3.1.0-158.oe2403sp4.aarch64.rpm rubygem-psych-5.0.1-158.oe2403sp4.aarch64.rpm rubygem-rbs-2.8.2-158.oe2403sp4.aarch64.rpm ruby-3.2.2-158.oe2403sp4.src.rpm ruby-3.2.2-158.oe2403sp4.x86_64.rpm ruby-bundled-gems-3.2.2-158.oe2403sp4.x86_64.rpm ruby-debuginfo-3.2.2-158.oe2403sp4.x86_64.rpm ruby-debugsource-3.2.2-158.oe2403sp4.x86_64.rpm ruby-devel-3.2.2-158.oe2403sp4.x86_64.rpm rubygem-bigdecimal-3.1.3-158.oe2403sp4.x86_64.rpm rubygem-io-console-0.6.0-158.oe2403sp4.x86_64.rpm rubygem-json-2.6.3-158.oe2403sp4.x86_64.rpm rubygem-openssl-3.1.0-158.oe2403sp4.x86_64.rpm rubygem-psych-5.0.1-158.oe2403sp4.x86_64.rpm rubygem-rbs-2.8.2-158.oe2403sp4.x86_64.rpm ruby-help-3.2.2-158.oe2403sp4.noarch.rpm ruby-irb-3.2.2-158.oe2403sp4.noarch.rpm rubygem-did_you_mean-1.6.3-158.oe2403sp4.noarch.rpm rubygem-minitest-5.16.3-158.oe2403sp4.noarch.rpm rubygem-rake-13.0.6-158.oe2403sp4.noarch.rpm rubygem-rdoc-6.5.0-158.oe2403sp4.noarch.rpm rubygem-rexml-3.2.5-158.oe2403sp4.noarch.rpm rubygem-rss-0.2.9-158.oe2403sp4.noarch.rpm rubygem-test-unit-3.5.7-158.oe2403sp4.noarch.rpm rubygem-typeprof-0.21.3-158.oe2403sp4.noarch.rpm rubygems-3.4.10-158.oe2403sp4.noarch.rpm rubygems-devel-3.4.10-158.oe2403sp4.noarch.rpm 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. 2026-08-30 CVE-2025-24294 openEuler-24.03-LTS-SP4 High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H ruby security update 2026-08-30 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3536 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. 2026-08-30 CVE-2026-27820 openEuler-24.03-LTS-SP4 Critical 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H ruby security update 2026-08-30 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3536 Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, several Net::IMAP commands accept a "raw data" argument that is sent verbatim after validation to prevent command injection. However, if a server does not support non-synchronizing literals, it may still be possible to inject arbitrary IMAP commands inside non-synchronizing literals. A server without support for non-synchronizing literals may interpret the "+}\r\n" as the end of a malformed command line and respond with a tagged BAD. In that case, the contents of the literal will be interpreted as one or more new pipelined commands, allowing a CRLF command injection attack to succeed. This affects criteria for #search and #uid_search; search_keys for #sort, #thread, #uid_sort, and #uid_thread; and attr for #fetch and #uid_fetch. This vulnerability is fixed in 0.6.5 and 0.5.15. 2026-08-30 CVE-2026-47240 openEuler-24.03-LTS-SP4 Medium 5.8 AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N ruby security update 2026-08-30 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3536 Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, several Net::IMAP commands accept a raw string argument which is only validated to prevent CRLF injection and then sent verbatim. If this string is derived from user-controlled input, an attacker can force the next command to be absorbed as a continuation of the first command. This will cause the first command to eventually fail, but also prevents it from returning until another command is sent (from another thread). That other command will not return until the connection is closed. This vulnerability is fixed in 0.6.5 and 0.5.15. 2026-08-30 CVE-2026-47241 openEuler-24.03-LTS-SP4 Low 2.1 AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N ruby security update 2026-08-30 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3536 Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, when Net::IMAP#id is called with a hash argument, although the ID field value strings are correctly quoted (escaping quoted specials), they were not validated to prohibit CRLF sequences. While Net::IMAP#enable does process its arguments for aliases, it does not validate them as valid atoms (or as a list of valid atoms). The #to_s value is sent verbatim. Arguments to either command could be used by an attacker to inject arbitrary IMAP commands. This vulnerability is fixed in 0.6.5 and 0.5.15. 2026-08-30 CVE-2026-47242 openEuler-24.03-LTS-SP4 Medium 5.8 AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N ruby security update 2026-08-30 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3536