CVE-2025-61772 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2025-61772 Interim 1 4 2026-03-05T00:27:58Z current 2025-11-01T00:15:13Z 2026-03-05T00:27:58Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2025-61772 Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, `Rack::Multipart::Parser` can accumulate unbounded data when a multipart part's header block never terminates with the required blank line (`CRLFCRLF`). The parser keeps appending incoming bytes to memory without a size cap, allowing a remote attacker to exhaust memory and cause a denial of service (DoS). Attackers can send incomplete multipart headers to trigger high memory use, leading to process termination (OOM) or severe slowdown. The effect scales with request size limits and concurrency. All applications handling multipart uploads may be affected. Versions 2.2.19, 3.1.17, and 3.2.2 cap per-part header size (e.g., 64 KiB). As a workaround, restrict maximum request sizes at the proxy or web server layer (e.g., Nginx `client_max_body_size`). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://lists.suse.com/pipermail/suse-liberty-linux-updates/2025-November/002167.html E-Mail link for RHSA-2025:19512 https://lists.suse.com/pipermail/suse-liberty-linux-updates/2025-November/002181.html E-Mail link for RHSA-2025:19719 https://www.suse.com/support/security/rating/ SUSE Security Ratings SUSE Liberty Linux 8 SUSE Liberty Linux 9 SUSE Linux Enterprise High Availability Extension 15 SP3 SUSE Linux Enterprise High Availability Extension 15 SP4 SUSE Linux Enterprise High Availability Extension 15 SP5 SUSE Linux Enterprise High Availability Extension 15 SP6 SUSE Linux Enterprise High Availability Extension 15 SP7 openSUSE Leap 15.6 openSUSE Tumbleweed pcs-0.10.18-2.el8_10.7 pcs-0.11.9-2.el9_6.2 pcs-snmp-0.10.18-2.el8_10.7 pcs-snmp-0.11.9-2.el9_6.2 ruby2.5-rubygem-rack ruby2.5-rubygem-rack-1_6 ruby2.5-rubygem-rack-doc ruby2.5-rubygem-rack-doc-1_6 ruby2.5-rubygem-rack-testsuite ruby2.5-rubygem-rack-testsuite-1_6 ruby3.4-rubygem-rack-2.2-2.2.19-1.1 ruby4.0-rubygem-rack-2.2-2.2.22-1.1 rubygem-rack rubygem-rack-1_6 pcs-0.10.18-2.el8_10.7 as a component of SUSE Liberty Linux 8 pcs-snmp-0.10.18-2.el8_10.7 as a component of SUSE Liberty Linux 8 pcs-0.11.9-2.el9_6.2 as a component of SUSE Liberty Linux 9 pcs-snmp-0.11.9-2.el9_6.2 as a component of SUSE Liberty Linux 9 ruby3.4-rubygem-rack-2.2-2.2.19-1.1 as a component of openSUSE Tumbleweed ruby4.0-rubygem-rack-2.2-2.2.22-1.1 as a component of openSUSE Tumbleweed ruby2.5-rubygem-rack as a component of SUSE Linux Enterprise High Availability Extension 15 SP3 rubygem-rack as a component of SUSE Linux Enterprise High Availability Extension 15 SP3 ruby2.5-rubygem-rack as a component of SUSE Linux Enterprise High Availability Extension 15 SP4 rubygem-rack as a component of SUSE Linux Enterprise High Availability Extension 15 SP4 ruby2.5-rubygem-rack as a component of SUSE Linux Enterprise High Availability Extension 15 SP5 rubygem-rack as a component of SUSE Linux Enterprise High Availability Extension 15 SP5 ruby2.5-rubygem-rack as a component of SUSE Linux Enterprise High Availability Extension 15 SP6 rubygem-rack as a component of SUSE Linux Enterprise High Availability Extension 15 SP6 ruby2.5-rubygem-rack as a component of SUSE Linux Enterprise High Availability Extension 15 SP7 rubygem-rack as a component of SUSE Linux Enterprise High Availability Extension 15 SP7 ruby2.5-rubygem-rack as a component of openSUSE Leap 15.6 ruby2.5-rubygem-rack-doc as a component of openSUSE Leap 15.6 ruby2.5-rubygem-rack-testsuite as a component of openSUSE Leap 15.6 rubygem-rack as a component of openSUSE Leap 15.6 ruby2.5-rubygem-rack-1_6 as a component of openSUSE Leap 15.6 ruby2.5-rubygem-rack-doc-1_6 as a component of openSUSE Leap 15.6 ruby2.5-rubygem-rack-testsuite-1_6 as a component of openSUSE Leap 15.6 rubygem-rack-1_6 as a component of openSUSE Leap 15.6 Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, `Rack::Multipart::Parser` can accumulate unbounded data when a multipart part's header block never terminates with the required blank line (`CRLFCRLF`). The parser keeps appending incoming bytes to memory without a size cap, allowing a remote attacker to exhaust memory and cause a denial of service (DoS). Attackers can send incomplete multipart headers to trigger high memory use, leading to process termination (OOM) or severe slowdown. The effect scales with request size limits and concurrency. All applications handling multipart uploads may be affected. Versions 2.2.19, 3.1.17, and 3.2.2 cap per-part header size (e.g., 64 KiB). As a workaround, restrict maximum request sizes at the proxy or web server layer (e.g., Nginx `client_max_body_size`). CVE-2025-61772 SUSE Liberty Linux 8:pcs-0.10.18-2.el8_10.7 SUSE Liberty Linux 8:pcs-snmp-0.10.18-2.el8_10.7 SUSE Liberty Linux 9:pcs-0.11.9-2.el9_6.2 SUSE Liberty Linux 9:pcs-snmp-0.11.9-2.el9_6.2 openSUSE Tumbleweed:ruby3.4-rubygem-rack-2.2-2.2.19-1.1 openSUSE Tumbleweed:ruby4.0-rubygem-rack-2.2-2.2.22-1.1 openSUSE Leap 15.6:ruby2.5-rubygem-rack-1_6 openSUSE Leap 15.6:ruby2.5-rubygem-rack-doc-1_6 openSUSE Leap 15.6:ruby2.5-rubygem-rack-testsuite-1_6 openSUSE Leap 15.6:rubygem-rack-1_6 important 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H