CVE-2026-56153

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{"affected_release": [{"advisory": "RHSA-2026:74858", "cpe": "cpe:/a:redhat:hummingbird:1", "package": "httpd-main-2.4.69-1.hum1", "product_name": "Red Hat Hardened Images", "release_date": "2026-10-02T00:00:00Z"}], "bugzilla": {"description": "httpd: httpd: Denial of Service via heap-based buffer overflow in mod_charset_lite", "id": "2544885", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544885"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-787", "details": ["A flaw was found in httpd's mod_charset_lite module. A heap-based buffer overflow (an out-of-bounds memory write) occurs in the finish_partial_char function when handling character set conversions. A remote attacker can exploit this flaw by sending specially crafted requests, leading to memory corruption. This issue primarily results in a Denial of Service (DoS) condition by crashing the server process."], "mitigation": {"lang": "en:us", "value": "Disable the mod_charset_lite module if character set translation is not required.\n1. Locate the configuration file loading the module, typically within `/etc/httpd/conf.modules.d/` (such as `00-base.conf` or a dedicated module configuration file).\n2. Comment out or remove the `LoadModule charset_lite_module` line:\n```\n# LoadModule charset_lite_module modules/mod_charset_lite.so\n```\n3. Reload the httpd service to apply the configuration change:\n```\nsystemctl reload httpd\n```\nCaveats: Applications that depend on mod_charset_lite for on-the-fly character set conversion will fail to translate character sets once the module is disabled.\nWarning: Reloading or restarting the httpd service will momentarily disrupt active network connections or in-flight requests."}, "name": "CVE-2026-56153", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "httpd:2.4/httpd", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-10-01T16:03:25Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-56153\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-56153\nhttp://www.openwall.com/lists/oss-security/2026/10/01/16\nhttps://httpd.apache.org/security/vulnerabilities_24.html"], "threat_severity": "Important"}

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