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"package": "thunderbird-0:128.6.0-3.el9_4", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-01-09T00:00:00Z"}], "bugzilla": {"description": "firefox: thunderbird: Use-after-free when breaking lines in text", "id": "2336165", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2336165"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Firefox ESR < 115.19, Thunderbird < 134, and Thunderbird < 128.6.", "A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash."], "name": "CVE-2025-0238", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "firefox-flatpak-container", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "thunderbird-flatpak-container", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "firefox:flatpak/firefox", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "thunderbird:flatpak/thunderbird", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-01-07T16:07:06Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-0238\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-0238\nhttps://bugzilla.mozilla.org/show_bug.cgi?id=1915535\nhttps://www.mozilla.org/security/advisories/mfsa2025-01/\nhttps://www.mozilla.org/security/advisories/mfsa2025-02/\nhttps://www.mozilla.org/security/advisories/mfsa2025-03/"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Moderate"}

{"analysis": {"en": {"generated_at": "2026-04-20T18:33:55.693903+00:00", "value": {"mitigation_remediation": ["Upgrade to Firefox 134, Firefox ESR 128.6, Firefox ESR 115.19, Thunderbird 134, or Thunderbird ESR 128.6", "If upgrading is infeasible, remove or disable the affected Mozilla components until a patch is available", "Apply any security updates provided by the operating system vendor that include the fixed Mozilla packages"], "summary": {"action": "Apply Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "Mozilla products are affected, including Firefox and Thunderbird. Versions prior to Firefox 134 or Firefox ESR 128.6 (and 115.19) and Thunderbird 134 or Thunderbird ESR 128.6 are susceptible. Any distribution that bundles these earlier releases, such as certain Red\u202fHat Enterprise Linux (RHEL) packages, is also at risk until it upgrades to a patched build.", "description_and_impact": "The vulnerability is a use\u2011after\u2011free condition that occurs when the software processes a controlled failed memory allocation during text line breaking. An attacker that can induce the failure could trigger the use\u2011after\u2011free, potentially leading to a crash and the ability to elevate privilege or execute arbitrary code in a limited manner. The weakness is classified as CWE\u2011416.", "risk_and_exploitability": "The CVSS score of 5.3 indicates a moderate impact and the EPSS score of less than 1% suggests a very low probability of exploitation in the wild. The vulnerability is not listed in the CISA KEV catalog. The attack vector is inferred to be local or require the attacker to cause a memory allocation failure, which may limit immediate remote exploitation."}}}}, "created": "2026-04-20T18:45:14.238454+00:00", "updated": "2026-04-20T18:45:14.238465+00:00", "vendors": []}