{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"MEDIUM" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"Issue summary: When OpenSSL processes QUIC traffic from a peer that repeatedly\nsends ack-eliciting packets while not acknowledging ACK-only responses, the\nQUIC stack can retain ACK-only packet metadata for the lifetime of the\nconnection.\n\nImpact summary: A remote peer that can complete a QUIC handshake can\ncause connection-scoped memory growth which may lead to Denial of Service\nthrough memory exhaustion, especially with sustained traffic or many concurrent\nQUIC connections.\n\nCWE: CWE-770: Allocation of Resources Without Limits or Throttling\n\nDescription: When the OpenSSL QUIC stack sends an ACK-only packet,\nthere is no requirement by the QUIC protocol that the peer will acknowledge\nthat ACK-only packet (i.e. it is itself not ack-eliciting). However, the OpenSSL\nimplementation stores the metadata about the ACK frames regardless.\nIn and of itself that's ok, but if a malicious peer establishes a connection, and\nthen drives the connection such that ACK-only packets are forced from the \nOpenSSL implementation peer (i.e., by sending numerous PING frames),\nand then withholding any subsequent acks for ack-eliciting data, like\nlegitimate data, said malicious peer can force inappropriate memory growth\non the OpenSSL peer, potentially leading to a Denial of Service.\n\nThe fix is to ensure that we account for the transmission of the ACK-only\npacket in the packet histories high and low watermark without actually storing\nthe ACK-only packet metadata itself.\n\nFIPS impact: no\nThe OpenSSL FIPS module is not affected as the QUIC code is\noutside the FIPS module boundary.", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63075" }, { "summary":"CVE-2026-63075 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2026/csaf-openeuler-cve-2026-63075.json" }, { "summary":"openEuler-SA-2026-3830", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3830" }, { "summary":"CVE-2026-63075", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-63075&packageName=openssl" } ], "title":"openEuler cve CVE-2026-63075", "tracking":{ "initial_release_date":"2026-09-16T18:08:09+08:00", "revision_history":[ { "date":"2026-09-16T18:08:09+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-09-16T18:08:09+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-09-16T18:08:09+08:00", "id":"CVE-2026-63075", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { 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"category":"default_component_of" }, { "relates_to_product_reference":"openEuler-24.03-LTS-SP4", "product_reference":"openssl-devel-3.5.6-7.oe2403sp4.x86_64.rpm", "full_product_name":{ "product_id":"openEuler-24.03-LTS-SP4:openssl-devel-3.5.6-7.oe2403sp4.x86_64", "name":"openssl-devel-3.5.6-7.oe2403sp4.x86_64 as a component of openEuler-24.03-LTS-SP4" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-24.03-LTS-SP4", "product_reference":"openssl-libs-3.5.6-7.oe2403sp4.x86_64.rpm", "full_product_name":{ "product_id":"openEuler-24.03-LTS-SP4:openssl-libs-3.5.6-7.oe2403sp4.x86_64", "name":"openssl-libs-3.5.6-7.oe2403sp4.x86_64 as a component of openEuler-24.03-LTS-SP4" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-24.03-LTS-SP4", "product_reference":"openssl-perl-3.5.6-7.oe2403sp4.x86_64.rpm", "full_product_name":{ "product_id":"openEuler-24.03-LTS-SP4:openssl-perl-3.5.6-7.oe2403sp4.x86_64", "name":"openssl-perl-3.5.6-7.oe2403sp4.x86_64 as a component of openEuler-24.03-LTS-SP4" }, "category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2026-63075", "notes":[ { "text":"Issue summary: When OpenSSL processes QUIC traffic from a peer that repeatedly\nsends ack-eliciting packets while not acknowledging ACK-only responses, the\nQUIC stack can retain ACK-only packet metadata for the lifetime of the\nconnection.\n\nImpact summary: A remote peer that can complete a QUIC handshake can\ncause connection-scoped memory growth which may lead to Denial of Service\nthrough memory exhaustion, especially with sustained traffic or many concurrent\nQUIC connections.\n\nCWE: CWE-770: Allocation of Resources Without Limits or Throttling\n\nDescription: When the OpenSSL QUIC stack sends an ACK-only packet,\nthere is no requirement by the QUIC protocol that the peer will acknowledge\nthat ACK-only packet (i.e. it is itself not ack-eliciting). However, the OpenSSL\nimplementation stores the metadata about the ACK frames regardless.\nIn and of itself that's ok, but if a malicious peer establishes a connection, and\nthen drives the connection such that ACK-only packets are forced from the \nOpenSSL implementation peer (i.e., by sending numerous PING frames),\nand then withholding any subsequent acks for ack-eliciting data, like\nlegitimate data, said malicious peer can force inappropriate memory growth\non the OpenSSL peer, potentially leading to a Denial of Service.\n\nThe fix is to ensure that we account for the transmission of the ACK-only\npacket in the packet histories high and low watermark without actually storing\nthe ACK-only packet metadata itself.\n\nFIPS impact: no\nThe OpenSSL FIPS module is not affected as the QUIC code is\noutside the FIPS module boundary.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-24.03-LTS-SP4:openssl-help-3.5.6-7.oe2403sp4.noarch", "openEuler-24.03-LTS-SP4:openssl-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-debuginfo-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-debugsource-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-devel-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-libs-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-perl-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-3.5.6-7.oe2403sp4.src", "openEuler-24.03-LTS-SP4:openssl-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-debuginfo-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-debugsource-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-devel-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-libs-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-perl-3.5.6-7.oe2403sp4.x86_64" ] }, "remediations":[ { "product_ids":[ "openEuler-24.03-LTS-SP4:openssl-help-3.5.6-7.oe2403sp4.noarch", "openEuler-24.03-LTS-SP4:openssl-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-debuginfo-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-debugsource-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-devel-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-libs-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-perl-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-3.5.6-7.oe2403sp4.src", "openEuler-24.03-LTS-SP4:openssl-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-debuginfo-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-debugsource-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-devel-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-libs-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-perl-3.5.6-7.oe2403sp4.x86_64" ], "details":"openssl security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3830" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"HIGH", "baseScore":7.5, "vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version":"3.1" }, "products":[ "openEuler-24.03-LTS-SP4:openssl-help-3.5.6-7.oe2403sp4.noarch", "openEuler-24.03-LTS-SP4:openssl-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-debuginfo-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-debugsource-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-devel-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-libs-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-perl-3.5.6-7.oe2403sp4.aarch64", "openEuler-24.03-LTS-SP4:openssl-3.5.6-7.oe2403sp4.src", "openEuler-24.03-LTS-SP4:openssl-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-debuginfo-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-debugsource-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-devel-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-libs-3.5.6-7.oe2403sp4.x86_64", "openEuler-24.03-LTS-SP4:openssl-perl-3.5.6-7.oe2403sp4.x86_64" ] } ], "threats":[ { "details":"High", "category":"impact" } ], "title":"CVE-2026-63075" } ] }