{"document":{"aggregate_severity":{"namespace":"https://access.redhat.com/security/updates/classification/","text":"Low"},"category":"csaf_vex","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":"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":"Canonical URL","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-18924.json"}],"title":"curl: libcurl: Use-after-free in HTTP/2 Server Push with shared connections","tracking":{"current_release_date":"2026-09-16T14:43:09+00:00","generator":{"date":"2026-09-16T14:43:09+00:00","engine":{"name":"Red Hat SDEngine","version":"5.3.21"}},"id":"CVE-2026-18924","initial_release_date":"2026-09-06T17:47:27.820000+00:00","revision_history":[{"date":"2026-09-06T17:47:27.820000+00:00","number":"1","summary":"Initial version"},{"date":"2026-09-16T13:47:22+00:00","number":"2","summary":"Current version"},{"date":"2026-09-16T14:43:09+00:00","number":"3","summary":"Last generated version"}],"status":"final","version":"3"}},"product_tree":{"branches":[{"branches":[{"branches":[{"category":"product_name","name":"Red Hat Hardened Images","product":{"name":"Red Hat Hardened Images","product_id":"red_hat_hardened_images","product_identification_helper":{"cpe":"cpe:/a:redhat:hummingbird:1"}}}],"category":"product_family","name":"Red Hat Hardened Images"},{"category":"product_version","name":"curl.src","product":{"name":"curl.src","product_id":"curl.src","product_identification_helper":{"purl":"pkg:rpm/redhat/curl?arch=src"}}},{"category":"product_version","name":"openshell.src","product":{"name":"openshell.src","product_id":"openshell.src","product_identification_helper":{"purl":"pkg:rpm/redhat/openshell?arch=src"}}},{"category":"product_version","name":"rust.src","product":{"name":"rust.src","product_id":"rust.src","product_identification_helper":{"purl":"pkg:rpm/redhat/rust?arch=src"}}}],"category":"vendor","name":"Red Hat"}],"relationships":[{"category":"default_component_of","full_product_name":{"name":"curl.src as a component of Red Hat Hardened Images","product_id":"red_hat_hardened_images:curl.src"},"product_reference":"curl.src","relates_to_product_reference":"red_hat_hardened_images"},{"category":"default_component_of","full_product_name":{"name":"openshell.src as a component of Red Hat Hardened Images","product_id":"red_hat_hardened_images:openshell.src"},"product_reference":"openshell.src","relates_to_product_reference":"red_hat_hardened_images"},{"category":"default_component_of","full_product_name":{"name":"rust.src as a component of Red Hat Hardened Images","product_id":"red_hat_hardened_images:rust.src"},"product_reference":"rust.src","relates_to_product_reference":"red_hat_hardened_images"}]},"vulnerabilities":[{"cve":"CVE-2026-18924","cwe":{"id":"CWE-825","name":"Expired Pointer Dereference"},"discovery_date":"2026-09-06T17:51:03.812362+00:00","flags":[{"label":"component_not_present","product_ids":["red_hat_hardened_images:openshell.src"]}],"ids":[{"system_name":"Red Hat Bugzilla ID","text":"2529201"}],"notes":[{"category":"description","text":"A flaw was found in libcurl's handling of HTTP/2 Server Push streams. When an application is configured to use HTTP/2 push with shared connections, a remote malicious server can trigger a use-after-free vulnerability during the cleanup process. This can lead to application instability or a denial of service.","title":"Vulnerability description"},{"category":"summary","text":"curl: libcurl: Use-after-free in HTTP/2 Server Push with shared connections","title":"Vulnerability summary"},{"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":{"known_affected":["red_hat_hardened_images:curl.src","red_hat_hardened_images:rust.src"],"known_not_affected":["red_hat_hardened_images:openshell.src"]},"references":[{"category":"self","summary":"Canonical URL","url":"https://access.redhat.com/security/cve/CVE-2026-18924"},{"category":"external","summary":"RHBZ#2529201","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2529201"},{"category":"external","summary":"https://www.cve.org/CVERecord?id=CVE-2026-18924","url":"https://www.cve.org/CVERecord?id=CVE-2026-18924"},{"category":"external","summary":"https://nvd.nist.gov/vuln/detail/CVE-2026-18924","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18924"},{"category":"external","summary":"https://curl.se/docs/CVE-2026-18924.html","url":"https://curl.se/docs/CVE-2026-18924.html"},{"category":"external","summary":"https://curl.se/docs/CVE-2026-18924.json","url":"https://curl.se/docs/CVE-2026-18924.json"},{"category":"external","summary":"https://hackerone.com/reports/3916059","url":"https://hackerone.com/reports/3916059"}],"release_date":"2026-09-06T17:47:27.820000+00:00","remediations":[{"category":"none_available","details":"Affected","product_ids":["red_hat_hardened_images:curl.src","red_hat_hardened_images:rust.src"]}],"scores":[{"cvss_v3":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"products":["red_hat_hardened_images:curl.src","red_hat_hardened_images:openshell.src","red_hat_hardened_images:rust.src"]}],"threats":[{"category":"impact","details":"Low","product_ids":["red_hat_hardened_images:curl.src","red_hat_hardened_images:openshell.src","red_hat_hardened_images:rust.src"]}],"title":"curl: libcurl: Use-after-free in HTTP/2 Server Push with shared connections"}]}