{"document":{"aggregate_severity":{"namespace":"https://access.redhat.com/security/updates/classification/","text":"Important"},"category":"csaf_security_advisory","csaf_version":"2.0","distribution":{"text":"Copyright © Red Hat, Inc. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"An update for runc is now available for Red Hat Enterprise Linux 9.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.","title":"Topic"},{"category":"general","text":"The runC tool is a lightweight, portable implementation of the Open Container Format (OCF) that provides container runtime.\n\nSecurity Fix(es):\n\n* net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution (CVE-2026-56860)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","title":"Details"},{"category":"legal_disclaimer","text":"This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.","title":"Terms of Use"}],"publisher":{"category":"vendor","contact_details":"https://access.redhat.com/security/team/contact/","issuing_authority":"Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.","name":"Red Hat Product Security","namespace":"https://www.redhat.com"},"references":[{"category":"self","summary":"https://access.redhat.com/errata/RHSA-2026:70191","url":"https://access.redhat.com/errata/RHSA-2026:70191"},{"category":"external","summary":"https://access.redhat.com/security/updates/classification/#important","url":"https://access.redhat.com/security/updates/classification/#important"},{"category":"external","summary":"2515820","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2515820"},{"category":"self","summary":"Canonical URL","url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_70191.json"}],"title":"Red Hat Security Advisory: runc security update","tracking":{"current_release_date":"2026-09-23T03:51:58+00:00","generator":{"date":"2026-09-23T03:51:58+00:00","engine":{"name":"Red Hat SDEngine","version":"5.4.0"}},"id":"RHSA-2026:70191","initial_release_date":"2026-09-23T03:21:00+00:00","revision_history":[{"date":"2026-09-23T03:21:00+00:00","number":"1","summary":"Initial version"},{"date":"2026-09-23T03:21:00+00:00","number":"2","summary":"Last updated version"},{"date":"2026-09-23T03:51:58+00:00","number":"3","summary":"Last generated version"}],"status":"final","version":"3"}},"product_tree":{"branches":[{"branches":[{"branches":[{"category":"product_name","name":"Red Hat Enterprise Linux AppStream (v. 9)","product":{"name":"Red Hat Enterprise Linux AppStream (v. 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This vulnerability arises when resolving relative paths that contain numerous parent directory ('..') segments. A remote attacker could exploit this by providing a specially crafted path, leading to quadratic time complexity and excessive memory allocation. This can result in a Denial of Service (DoS) due to resource exhaustion.","title":"Vulnerability description"},{"category":"summary","text":"net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution","title":"Vulnerability summary"},{"category":"other","text":"This is an Important denial of service flaw in the Go `net/url` package. Applications built with Go that process untrusted URLs containing parent directory segments ('..') may be vulnerable to excessive resource consumption due to quadratic time complexity in path resolution. This can lead to a denial of service, impacting the availability of affected services.","title":"Statement"},{"category":"general","text":"The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.","title":"CVSS score applicability"}],"product_status":{"fixed":["AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.aarch64","AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.ppc64le","AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.s390x","AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.src","AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.x86_64","AppStream-9.8.0.Z.MAIN.EUS:runc-debuginfo-4:1.4.2-3.el9_8.aarch64","AppStream-9.8.0.Z.MAIN.EUS:runc-debuginfo-4:1.4.2-3.el9_8.ppc64le","AppStream-9.8.0.Z.MAIN.EUS:runc-debuginfo-4:1.4.2-3.el9_8.s390x","AppStream-9.8.0.Z.MAIN.EUS:runc-debuginfo-4:1.4.2-3.el9_8.x86_64","AppStream-9.8.0.Z.MAIN.EUS:runc-debugsource-4:1.4.2-3.el9_8.aarch64","AppStream-9.8.0.Z.MAIN.EUS:runc-debugsource-4:1.4.2-3.el9_8.ppc64le","AppStream-9.8.0.Z.MAIN.EUS:runc-debugsource-4:1.4.2-3.el9_8.s390x","AppStream-9.8.0.Z.MAIN.EUS:runc-debugsource-4:1.4.2-3.el9_8.x86_64"]},"references":[{"category":"self","summary":"Canonical URL","url":"https://access.redhat.com/security/cve/CVE-2026-56860"},{"category":"external","summary":"RHBZ#2515820","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2515820"},{"category":"external","summary":"https://www.cve.org/CVERecord?id=CVE-2026-56860","url":"https://www.cve.org/CVERecord?id=CVE-2026-56860"},{"category":"external","summary":"https://nvd.nist.gov/vuln/detail/CVE-2026-56860","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56860"},{"category":"external","summary":"https://go.dev/cl/803681","url":"https://go.dev/cl/803681"},{"category":"external","summary":"https://go.dev/issue/80494","url":"https://go.dev/issue/80494"},{"category":"external","summary":"https://groups.google.com/g/golang-announce/c/94pEornpRlI","url":"https://groups.google.com/g/golang-announce/c/94pEornpRlI"},{"category":"external","summary":"https://pkg.go.dev/vuln/GO-2026-6218","url":"https://pkg.go.dev/vuln/GO-2026-6218"}],"release_date":"2026-08-13T21:58:53.731000+00:00","remediations":[{"category":"vendor_fix","date":"2026-09-23T03:21:00+00:00","details":"For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258","product_ids":["AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.aarch64","AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.ppc64le","AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.s390x","AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.src","AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.x86_64","AppStream-9.8.0.Z.MAIN.EUS:runc-debuginfo-4:1.4.2-3.el9_8.aarch64","AppStream-9.8.0.Z.MAIN.EUS:runc-debuginfo-4:1.4.2-3.el9_8.ppc64le","AppStream-9.8.0.Z.MAIN.EUS:runc-debuginfo-4:1.4.2-3.el9_8.s390x","AppStream-9.8.0.Z.MAIN.EUS:runc-debuginfo-4:1.4.2-3.el9_8.x86_64","AppStream-9.8.0.Z.MAIN.EUS:runc-debugsource-4:1.4.2-3.el9_8.aarch64","AppStream-9.8.0.Z.MAIN.EUS:runc-debugsource-4:1.4.2-3.el9_8.ppc64le","AppStream-9.8.0.Z.MAIN.EUS:runc-debugsource-4:1.4.2-3.el9_8.s390x","AppStream-9.8.0.Z.MAIN.EUS:runc-debugsource-4:1.4.2-3.el9_8.x86_64"],"restart_required":{"category":"none"},"url":"https://access.redhat.com/errata/RHSA-2026:70191"}],"scores":[{"cvss_v3":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"products":["AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.aarch64","AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.ppc64le","AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.s390x","AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.src","AppStream-9.8.0.Z.MAIN.EUS:runc-4:1.4.2-3.el9_8.x86_64","AppStream-9.8.0.Z.MAIN.EUS:runc-debuginfo-4:1.4.2-3.el9_8.aarch64","AppStream-9.8.0.Z.MAIN.EUS:runc-debuginfo-4:1.4.2-3.el9_8.ppc64le","AppStream-9.8.0.Z.MAIN.EUS:runc-debuginfo-4:1.4.2-3.el9_8.s390x","AppStream-9.8.0.Z.MAIN.EUS:runc-debuginfo-4:1.4.2-3.el9_8.x86_64","AppStream-9.8.0.Z.MAIN.EUS:runc-debugsource-4:1.4.2-3.el9_8.aarch64","AppStream-9.8.0.Z.MAIN.EUS:runc-debugsource-4:1.4.2-3.el9_8.ppc64le","AppStream-9.8.0.Z.MAIN.EUS:runc-debugsource-4:1.4.2-3.el9_8.s390x","AppStream-9.8.0.Z.MAIN.EUS:runc-debugsource-4:1.4.2-3.el9_8.x86_64"]}],"threats":[{"category":"impact","details":"Important"}],"title":"net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution"}]}