{"id":"CVE-2026-18393","state":"PUBLISHED","title":"Ffmpeg: ffmpeg: heap buffer overflow in tdsc_load_cursor() via cur_fmt_mono cursor","description":"A flaw was found in FFmpeg. The tdsc_load_cursor() function writes beyond\nthe bounds of a heap-allocated buffer when processing crafted TDSC cursor\ndata. A remote attacker could exploit this by supplying a specially crafted\nvideo file, potentially leading to a denial of service or arbitrary code\nexecution.","publishedAt":"2026-08-28T09:05:35.022Z","updatedAt":"2026-08-28T15:55:50.649Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H","source":"redhat"},"assigner":"redhat","products":["Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3","Red Hat Red Hat OpenShift AI (RHOAI)"],"affected":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AI (RHEL AI) 3","packageName":"ffmpeg","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux_ai:3"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","packageName":"rhoai/odh-vllm-gaudi-rhel9","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_ai"]}],"references":["https://access.redhat.com/security/cve/CVE-2026-18393","https://bugzilla.redhat.com/show_bug.cgi?id=2520309","https://github.com/FFmpeg/FFmpeg/commit/242ff799c75f20bade946314c8d741d0887ee11c","https://patchwork.ffmpeg.org/project/ffmpeg/patch/177767065817.63.1948165304485903849@29965ddac10e/"],"weaknesses":["CWE-787"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/18xxx/CVE-2026-18393.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-18393","state":"PUBLISHED","datePublished":"2026-08-28T09:05:35.022Z","dateUpdated":"2026-08-28T15:55:50.649Z","assignerShortName":"redhat","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateReserved":"2026-07-30T14:46:29.814Z"},"containers":{"cna":{"title":"Ffmpeg: ffmpeg: heap buffer overflow in tdsc_load_cursor() via cur_fmt_mono cursor","descriptions":[{"lang":"en","value":"A flaw was found in FFmpeg. The tdsc_load_cursor() function writes beyond\nthe bounds of a heap-allocated buffer when processing crafted TDSC cursor\ndata. A remote attacker could exploit this by supplying a specially crafted\nvideo file, potentially leading to a denial of service or arbitrary code\nexecution."}],"affected":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux AI (RHEL AI) 3","packageName":"ffmpeg","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux_ai:3"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","packageName":"rhoai/odh-vllm-gaudi-rhel9","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_ai"]}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-18393","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2520309","name":"RHBZ#2520309","tags":["issue-tracking","x_refsource_REDHAT"]},{"url":"https://github.com/FFmpeg/FFmpeg/commit/242ff799c75f20bade946314c8d741d0887ee11c"},{"url":"https://patchwork.ffmpeg.org/project/ffmpeg/patch/177767065817.63.1948165304485903849@29965ddac10e/"}],"metrics":[{"other":{"content":{"value":"Moderate","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","description":"Out-of-bounds Write","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"redhat","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateUpdated":"2026-08-28T09:21:17.392Z"},"datePublic":"2026-05-02T00:00:00.000Z","x_redhatCweChain":"CWE-787: Out-of-bounds Write","workarounds":[{"lang":"en","value":"Avoid opening untrusted TDSC-encoded video content with vulnerable FFmpeg consumers until a patched version is available."}],"timeline":[{"lang":"en","time":"2026-05-02T00:00:00.000Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-05-02T00:00:00.000Z","value":"Made public."}],"credits":[{"lang":"en","value":"Red Hat would like to thank Seung Min Shin (Ajou University) for reporting this issue."}],"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-28T14:32:52.764976Z","id":"CVE-2026-18393","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-28T15:55:50.649Z"}}]}}}