CVE-2026-11623

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{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:tmux:tmux:*:*:*:*:*:*:*:*"], "product": "tmux", "vendor": "n/a", "versions": [{"status": "affected", "version": "3.6a"}, {"status": "unaffected", "version": "3.7-rc"}]}], "source": "cna@vuldb.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A security vulnerability has been detected in tmux up to 3.6a. Affected is the function image_free of the file image.c. Such manipulation leads to use after free. Local access is required to approach this attack. This attack is characterized by high complexity. The exploitability is told to be difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 3.7-rc is able to address this issue. The name of the patch is fc6d94a9f8a593bd8b7031650802084385d4ee03. The affected component should be upgraded."}, {"lang": "es", "value": "Una vulnerabilidad de seguridad ha sido detectada en tmux hasta la versi\u00f3n 3.6a. Afectada es la funci\u00f3n image_free del archivo image.c. Dicha manipulaci\u00f3n conduce a uso despu\u00e9s de liberar. Acceso local es requerido para llevar a cabo este ataque. Este ataque se caracteriza por alta complejidad. La explotabilidad se dice que es dif\u00edcil. El exploit ha sido divulgado p\u00fablicamente y puede ser utilizado. La actualizaci\u00f3n a la versi\u00f3n 3.7-rc es capaz de abordar este problema. El nombre del parche es fc6d94a9f8a593bd8b7031650802084385d4ee03. El componente afectado deber\u00eda ser actualizado."}], "id": "CVE-2026-11623", "lastModified": "2026-07-23T08:10:00.137", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "HIGH", "accessVector": "LOCAL", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 3.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:H/Au:S/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 1.5, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 4.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.4, "source": "cna@vuldb.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 1.1, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-11623", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-09T13:28:02.658544Z", "version": "2.0.3"}}]}, "published": "2026-06-09T05:16:30.227", "references": [{"source": "cna@vuldb.com", "url": "https://gist.github.com/XlabAITeam/f0d9952595f795129a3258ba73bbc3cb"}, {"source": "cna@vuldb.com", "url": "https://github.com/tmux/tmux/"}, {"source": "cna@vuldb.com", "url": "https://github.com/tmux/tmux/commit/fc6d94a9f8a593bd8b7031650802084385d4ee03"}, {"source": "cna@vuldb.com", "url": "https://github.com/tmux/tmux/releases/tag/3.7-rc"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/cve/CVE-2026-11623"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/submit/835623"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/369303"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/369303/cti"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-416"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{"bugzilla": {"description": "tmux: tmux: Use-after-free vulnerability", "id": "2486713", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2486713"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L", "status": "draft"}, "cwe": "CWE-825", "details": ["A security vulnerability has been detected in tmux up to 3.6a. Affected is the function image_free of the file image.c. Such manipulation leads to use after free. Local access is required to approach this attack. This attack is characterized by high complexity. The exploitability is told to be difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 3.7-rc is able to address this issue. The name of the patch is fc6d94a9f8a593bd8b7031650802084385d4ee03. The affected component should be upgraded.", "A flaw was found in tmux. A local attacker could exploit a use-after-free vulnerability in the `image_free` function, potentially leading to information disclosure or denial of service. Exploitation of this flaw is considered difficult due to its high complexity."], "name": "CVE-2026-11623", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "tmux", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "tmux", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "tmux", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "tmux", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Under investigation", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-06-09T03:15:12Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-11623\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-11623\nhttps://gist.github.com/XlabAITeam/f0d9952595f795129a3258ba73bbc3cb\nhttps://github.com/tmux/tmux/\nhttps://github.com/tmux/tmux/commit/fc6d94a9f8a593bd8b7031650802084385d4ee03\nhttps://github.com/tmux/tmux/releases/tag/3.7-rc\nhttps://vuldb.com/cve/CVE-2026-11623\nhttps://vuldb.com/submit/835623\nhttps://vuldb.com/vuln/369303\nhttps://vuldb.com/vuln/369303/cti"], "statement": "This flaw in tmux is rated as Low impact. Exploitation requires local access and is considered difficult due to the high complexity of the attack, limiting the risk to systems where an attacker already has user-level access. The vulnerability could lead to information disclosure or denial of service.", "threat_severity": "Low"}

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