CVE-2026-6844

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A local attacker could exploit two Denial of Service (DoS) vulnerabilities by providing a specially crafted Executable and Linkable Format (ELF) file. One vulnerability, a resource exhaustion (CWE-400), can lead to an out-of-memory condition. The other, a null pointer dereference (CWE-476), can cause a segmentation fault. Both issues can result in the `readelf` utility becoming unresponsive or crashing, leading to a denial of service."}, {"lang": "es", "value": "Se encontr\u00f3 una falla en la utilidad \u2019readelf\u2019 del paquete binutils. Un atacante local podr\u00eda explotar dos vulnerabilidades de denegaci\u00f3n de servicio (DoS) al proporcionar un archivo Executable and Linkable Format (ELF) especialmente dise\u00f1ado. Una vulnerabilidad, un agotamiento de recursos (CWE-400), puede llevar a una condici\u00f3n de falta de memoria. La otra, una desreferencia de puntero nulo (CWE-476), puede causar una falla de segmentaci\u00f3n. Ambos problemas pueden resultar en que la utilidad \u2019readelf\u2019 deje de responder o se bloquee, lo que lleva a una denegaci\u00f3n de servicio."}], "id": "CVE-2026-6844", "lastModified": "2026-11-06T08:17:36.190", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-6844", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-23T13:58:06.237306Z", "version": "2.0.3"}}]}, "published": "2026-04-22T09:16:27.140", "references": [{"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2026-6844"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460016"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank samuel kariri kamau for reporting this issue.", "bugzilla": {"description": "binutils: Binutils: Denial of Service vulnerabilities in readelf via crafted ELF files", "id": "2460016", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460016"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-400", "details": ["A flaw was found in the `readelf` utility of the binutils package. A local attacker could exploit two Denial of Service (DoS) vulnerabilities by providing a specially crafted Executable and Linkable Format (ELF) file. One vulnerability, a resource exhaustion (CWE-400), can lead to an out-of-memory condition. The other, a null pointer dereference (CWE-476), can cause a segmentation fault. Both issues can result in the `readelf` utility becoming unresponsive or crashing, leading to a denial of service."], "mitigation": {"lang": "en:us", "value": "To mitigate this vulnerability, users should avoid using the `readelf` utility on untrusted or suspicious ELF files. Processing a specially crafted ELF file with `readelf` can lead to a denial of service."}, "name": "CVE-2026-6844", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "binutils", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "gcc-toolset-15-binutils", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "gdb", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "mingw-binutils", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "binutils", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "binutils", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "gcc-toolset-14-binutils", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "gcc-toolset-14-gdb", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "gcc-toolset-15-binutils", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "gcc-toolset-15-gdb", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "gdb", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "mingw-binutils", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "binutils", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "gcc-toolset-14-binutils", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "gcc-toolset-15-binutils", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "gdb", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "mingw-binutils", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Fix deferred", "package_name": "binutils", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-04-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-6844\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-6844"], "statement": "Moderate: A denial of service vulnerability in `readelf` can be triggered by processing a crafted ELF file, leading to resource exhaustion or a null pointer dereference. This issue affects Red Hat Enterprise Linux 7, 8, 9, and 10, as well as other Red Hat products that include the binutils package. Exploitation requires a local attacker to entice a user to execute `readelf` on a malicious file.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat Enterprise Linux 10", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat Hardened Images", "source": "cna", "vendor": "Red Hat"}, "product": "hardened_images", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 86.0, "confidence_source": "matching", "scores": [{"score": 86.0, "source": "matching"}]}, "original": {"product": "Red Hat OpenShift Container Platform 4", "source": "cna", "vendor": "Red Hat"}, "product": "openshift_container_platform", "vendor": "redhat"}], "analysis": {"en": {"generated_at": "2026-04-22T10:51:55.369654+00:00", "value": {"mitigation_remediation": ["Avoid using `readelf` against untrusted or suspicious ELF files.", "Update the binutils package to a version that contains the fix once Red\u00a0Hat releases it.", "Restrict permissions on directories containing ELF binaries or employ container or sandbox policies to prevent execution of the vulnerable utility on untrusted data."], "summary": {"action": "Use Alternative", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Red\u00a0Hat Enterprise\u00a0Linux\u00a07,\u00a08,\u00a09,\u00a010, the Red\u00a0Hat Hardened Images, and the Red\u00a0Hat OpenShift Container Platform\u00a04. The binutils package is the impacted component. Specific release or patch information is not listed, so any existing installations that have not yet applied an update could be susceptible.", "description_and_impact": "The binutils `readelf` utility can be misused by a local attacker who supplies a carefully crafted ELF file. One weakness causes an out\u2011of\u2011memory condition, while the other leads to a null\u2011pointer dereference and a segmentation fault. Either path can crash or hang the utility, resulting in a denial of service for any process that relies on `readelf`.", "risk_and_exploitability": "The CVSS score of 5.5 places this flaw in the medium severity range, and the EPSS score is currently unavailable. It is not in the CISA KEV catalog. Because the vulnerability requires the attacker to have local access to a system and to supply a malicious ELF file, the threat is confined to local exploitation. However, the denial of service can disrupt services or routine system administration that uses `readelf`, potentially impacting availability of dependent tools or scripts."}}}}, "created": "2026-04-22T11:00:09.088890+00:00", "updated": "2026-04-22T11:43:46.102248+00:00", "vendors": ["redhat", "redhat$PRODUCT$enterprise_linux", "redhat$PRODUCT$hardened_images", "redhat$PRODUCT$openshift_container_platform"]}