{"document":{"aggregate_severity":{"namespace":"https://access.redhat.com/security/updates/classification/","text":"None"},"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/2025/cve-2025-2857.json"}],"title":"firefox: Firefox IPC sandbox escape on windows","tracking":{"current_release_date":"2026-06-30T10:26:22+00:00","generator":{"date":"2026-06-30T10:26:22+00:00","engine":{"name":"Red Hat 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9","product_id":"red_hat_enterprise_linux_9","product_identification_helper":{"cpe":"cpe:/o:redhat:enterprise_linux:9"}}}],"category":"product_family","name":"Red Hat Enterprise Linux 9"},{"category":"product_version","name":"firefox.src","product":{"name":"firefox.src","product_id":"firefox.src","product_identification_helper":{"purl":"pkg:rpm/redhat/firefox?arch=src"}}},{"category":"product_version","name":"firefox","product":{"name":"firefox","product_id":"firefox","product_identification_helper":{"purl":"pkg:rpm/redhat/firefox"}}},{"category":"product_version","name":"firefox-x11","product":{"name":"firefox-x11","product_id":"firefox-x11","product_identification_helper":{"purl":"pkg:rpm/redhat/firefox-x11"}}},{"category":"product_version","name":"firefox.src::firefox:flatpak","product":{"name":"firefox.src (firefox:flatpak)","product_id":"firefox.src::firefox:flatpak","product_identification_helper":{"purl":"pkg:rpm/redhat/firefox?arch=src&rpmmod=firefox:flatpak"}}},{"category":"product_version","name":"firefox::firefox:flatpak","product":{"name":"firefox (firefox:flatpak)","product_id":"firefox::firefox:flatpak","product_identification_helper":{"purl":"pkg:rpm/redhat/firefox?rpmmod=firefox:flatpak"}}},{"category":"product_version","name":"firefox-x11::firefox:flatpak","product":{"name":"firefox-x11 (firefox:flatpak)","product_id":"firefox-x11::firefox:flatpak","product_identification_helper":{"purl":"pkg:rpm/redhat/firefox-x11?rpmmod=firefox:flatpak"}}}],"category":"vendor","name":"Red Hat"}],"relationships":[{"category":"default_component_of","full_product_name":{"name":"firefox as a component of Red Hat Enterprise Linux 10","product_id":"red_hat_enterprise_linux_10:firefox"},"product_reference":"firefox","relates_to_product_reference":"red_hat_enterprise_linux_10"},{"category":"default_component_of","full_product_name":{"name":"firefox.src as a component of Red Hat Enterprise Linux 10","product_id":"red_hat_enterprise_linux_10:firefox.src"},"product_reference":"firefox.src","relates_to_product_reference":"red_hat_enterprise_linux_10"},{"category":"default_component_of","full_product_name":{"name":"firefox as a component of Red Hat Enterprise Linux 6","product_id":"red_hat_enterprise_linux_6:firefox"},"product_reference":"firefox","relates_to_product_reference":"red_hat_enterprise_linux_6"},{"category":"default_component_of","full_product_name":{"name":"firefox.src as a component of Red Hat Enterprise Linux 6","product_id":"red_hat_enterprise_linux_6:firefox.src"},"product_reference":"firefox.src","relates_to_product_reference":"red_hat_enterprise_linux_6"},{"category":"default_component_of","full_product_name":{"name":"firefox as a component of Red Hat Enterprise Linux 7","product_id":"red_hat_enterprise_linux_7:firefox"},"product_reference":"firefox","relates_to_product_reference":"red_hat_enterprise_linux_7"},{"category":"default_component_of","full_product_name":{"name":"firefox.src as a component of Red Hat Enterprise Linux 7","product_id":"red_hat_enterprise_linux_7:firefox.src"},"product_reference":"firefox.src","relates_to_product_reference":"red_hat_enterprise_linux_7"},{"category":"default_component_of","full_product_name":{"name":"firefox as a component of Red Hat Enterprise Linux 8","product_id":"red_hat_enterprise_linux_8:firefox"},"product_reference":"firefox","relates_to_product_reference":"red_hat_enterprise_linux_8"},{"category":"default_component_of","full_product_name":{"name":"firefox.src as a component of Red Hat Enterprise Linux 8","product_id":"red_hat_enterprise_linux_8:firefox.src"},"product_reference":"firefox.src","relates_to_product_reference":"red_hat_enterprise_linux_8"},{"category":"default_component_of","full_product_name":{"name":"firefox as a component of Red Hat Enterprise Linux 9","product_id":"red_hat_enterprise_linux_9:firefox"},"product_reference":"firefox","relates_to_product_reference":"red_hat_enterprise_linux_9"},{"category":"default_component_of","full_product_name":{"name":"firefox-x11 as a component of Red Hat Enterprise Linux 9","product_id":"red_hat_enterprise_linux_9:firefox-x11"},"product_reference":"firefox-x11","relates_to_product_reference":"red_hat_enterprise_linux_9"},{"category":"default_component_of","full_product_name":{"name":"firefox-x11 (firefox:flatpak) as a component of Red Hat Enterprise Linux 9","product_id":"red_hat_enterprise_linux_9:firefox-x11::firefox:flatpak"},"product_reference":"firefox-x11::firefox:flatpak","relates_to_product_reference":"red_hat_enterprise_linux_9"},{"category":"default_component_of","full_product_name":{"name":"firefox.src as a component of Red Hat Enterprise Linux 9","product_id":"red_hat_enterprise_linux_9:firefox.src"},"product_reference":"firefox.src","relates_to_product_reference":"red_hat_enterprise_linux_9"},{"category":"default_component_of","full_product_name":{"name":"firefox.src (firefox:flatpak) as a component of Red Hat Enterprise Linux 9","product_id":"red_hat_enterprise_linux_9:firefox.src::firefox:flatpak"},"product_reference":"firefox.src::firefox:flatpak","relates_to_product_reference":"red_hat_enterprise_linux_9"},{"category":"default_component_of","full_product_name":{"name":"firefox (firefox:flatpak) as a component of Red Hat Enterprise Linux 9","product_id":"red_hat_enterprise_linux_9:firefox::firefox:flatpak"},"product_reference":"firefox::firefox:flatpak","relates_to_product_reference":"red_hat_enterprise_linux_9"}]},"vulnerabilities":[{"cve":"CVE-2025-2857","discovery_date":"2025-03-27T14:00:51.621734+00:00","flags":[{"label":"vulnerable_code_not_present","product_ids":["red_hat_enterprise_linux_10:firefox","red_hat_enterprise_linux_10:firefox.src","red_hat_enterprise_linux_6:firefox","red_hat_enterprise_linux_6:firefox.src","red_hat_enterprise_linux_7:firefox","red_hat_enterprise_linux_7:firefox.src","red_hat_enterprise_linux_8:firefox","red_hat_enterprise_linux_8:firefox.src","red_hat_enterprise_linux_9:firefox","red_hat_enterprise_linux_9:firefox-x11","red_hat_enterprise_linux_9:firefox-x11::firefox:flatpak","red_hat_enterprise_linux_9:firefox.src","red_hat_enterprise_linux_9:firefox.src::firefox:flatpak","red_hat_enterprise_linux_9:firefox::firefox:flatpak"]}],"ids":[{"system_name":"Red Hat Bugzilla ID","text":"2355327"}],"notes":[{"category":"description","text":"Following the recent Chrome sandbox escape (CVE-2025-2783), various Firefox developers identified a similar pattern in our IPC code. A compromised child process could cause the parent process to return an unintentionally powerful handle, leading to a sandbox escape. \nThe original vulnerability was being exploited in the wild. \n*This only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability was fixed in Firefox 136.0.4, Firefox ESR 128.8.1, and Firefox ESR 115.21.1.","title":"Vulnerability description"},{"category":"summary","text":"firefox: Firefox IPC sandbox escape on windows","title":"Vulnerability summary"},{"category":"other","text":"This vulnerability is specific to the Windows operating system and therefore does not affect any currently supported Red Hat products.","title":"Statement"}],"product_status":{"known_not_affected":["red_hat_enterprise_linux_10:firefox","red_hat_enterprise_linux_10:firefox.src","red_hat_enterprise_linux_6:firefox","red_hat_enterprise_linux_6:firefox.src","red_hat_enterprise_linux_7:firefox","red_hat_enterprise_linux_7:firefox.src","red_hat_enterprise_linux_8:firefox","red_hat_enterprise_linux_8:firefox.src","red_hat_enterprise_linux_9:firefox","red_hat_enterprise_linux_9:firefox-x11","red_hat_enterprise_linux_9:firefox-x11::firefox:flatpak","red_hat_enterprise_linux_9:firefox.src","red_hat_enterprise_linux_9:firefox.src::firefox:flatpak","red_hat_enterprise_linux_9:firefox::firefox:flatpak"]},"references":[{"category":"self","summary":"Canonical URL","url":"https://access.redhat.com/security/cve/CVE-2025-2857"},{"category":"external","summary":"RHBZ#2355327","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2355327"},{"category":"external","summary":"https://www.cve.org/CVERecord?id=CVE-2025-2857","url":"https://www.cve.org/CVERecord?id=CVE-2025-2857"},{"category":"external","summary":"https://nvd.nist.gov/vuln/detail/CVE-2025-2857","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-2857"},{"category":"external","summary":"https://bugzilla.mozilla.org/show_bug.cgi?id=1956398","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1956398"},{"category":"external","summary":"https://issues.chromium.org/issues/405143032","url":"https://issues.chromium.org/issues/405143032"},{"category":"external","summary":"https://www.mozilla.org/security/advisories/mfsa2025-19/","url":"https://www.mozilla.org/security/advisories/mfsa2025-19/"}],"release_date":"2025-03-27T13:27:57.377000+00:00","title":"firefox: Firefox IPC sandbox escape on windows"}]}