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{"bugzilla": {"description": "FFmpeg: FFmpeg: Integer overflow and out-of-bounds write via CENC subsample data", "id": "2458862", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2458862"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in FFmpeg. This vulnerability, stemming from an integer overflow and a subsequent out-of-bounds write during the processing of Common Encryption (CENC) subsample data, could allow a local attacker to potentially trigger information disclosure, data corruption, or a denial of service."], "name": "CVE-2026-40962", "package_state": [{"cpe": "cpe:/a:redhat:lightspeed_core", "fix_state": "Fix deferred", "package_name": "ffmpeg", "product_name": "Lightspeed Core"}, {"cpe": "cpe:/a:redhat:lightspeed_core", "fix_state": "Fix deferred", "package_name": "lightspeed-core/rag-tool-rhel9", "product_name": "Lightspeed Core"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Affected", "package_name": "ffmpeg", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Fix deferred", "package_name": "rhelai3/bootc-aws-cuda-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Fix deferred", "package_name": "rhelai3/bootc-azure-cuda-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Fix deferred", "package_name": "rhelai3/bootc-azure-rocm-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Fix deferred", "package_name": "rhelai3/bootc-cuda-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Fix deferred", "package_name": "rhelai3/bootc-gcp-cuda-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:enterprise_linux_ai:3", "fix_state": "Fix deferred", "package_name": "rhelai3/bootc-rocm-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI) 3"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "ffmpeg", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-vllm-gaudi-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}], "public_date": "2026-04-16T01:33:37Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-40962\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-40962\nhttps://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22348"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[4.1,8.1)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "FFmpeg", "source": "cna", "vendor": "FFmpeg"}, "product": "ffmpeg", "vendor": "ffmpeg"}], "analysis": {"en": {"generated_at": "2026-04-17T05:54:29.824319+00:00", "value": {"mitigation_remediation": ["Upgrade to FFmpeg 8.1 or later to apply the integer\u2011overflow fix.", "Disable or restrict CENC parsing in FFmpeg if the feature is not required, preventing malformed CENC data from being processed.", "Run FFmpeg in a sandboxed or low\u2011privilege environment to limit the impact of any potential memory corruption."], "summary": {"action": "Apply Patch", "impact": "Memory Corruption"}, "threat_synthesis": {"affected_systems": "All releases of FFmpeg before version 8.1 are affected. Any deployment that processes media files containing CENC subsample information on those versions is susceptible.", "description_and_impact": "An integer overflow can occur when FFmpeg processes Common Encryption (CENC) subsample data, leading to an out\u2011of\u2011bounds write in libavformat/mov.c. This overflow arises from insufficient bounds checking during media parsing and can corrupt stack or heap memory, potentially causing an application crash.", "risk_and_exploitability": "The CVSS score of 4.9 indicates moderate severity. The EPSS score is less than 1%, and the vulnerability is not listed in the CISA KEV catalog. An attacker would need to supply a malicious media file with crafted CENC data to trigger the overflow. If an application uses FFmpeg to process untrusted media or accepts media from external sources, the risk of exploitation is higher. No widespread exploitation has been reported. Updating the library is the recommended mitigation."}}}}, "created": "2026-04-16T05:15:25.364637+00:00", "updated": "2026-04-17T06:00:09.279852+00:00", "vendors": ["ffmpeg", "ffmpeg$PRODUCT$ffmpeg"]}