{"schemaVersion":3,"id":"CVE-2026-67549","aliases":["UBUNTU-CVE-2026-67549"],"status":"published","duplicateOf":null,"title":null,"description":"OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.1.16.0, A crafted 1-bit contiguous cmyk tiff is exposed through a native uint1 imagespec, so callers allocate a bit-packed buffer. tiffinput::read_native_scanline_locked() nevertheless invokes tiffinput::bit_convert() with 8-bit output and writes one expanded byte per value into that smaller buffer, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/tiff.imageio/tiffinput.cpp, TIFFInput::bit_convert(), TIFFInput::read_native_scanline_locked(), PHOTOMETRIC_SEPARATED, 1-bit CMYK, and native uint1 ImageSpec, which define the relevant source path, functions, state, and trigger. This issue is fixed in 3.1.16.0.","dates":{"published":"2026-09-18T15:49:38.085Z","modified":"2026-09-24T20:57:37.310Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.6,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.6,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.6,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","exploitability":7.2,"impact":7.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.6,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00288,"percentile":0.20207,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0.026000000000000023,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.00262},"history":[{"date":"2026-09-19T00:00:00.000Z","score":0.00262,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00262,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00262,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00262,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00262,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00376,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00376,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00376,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00376,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00376,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00376,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00288,"percentile":0.20207}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.00262,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00262,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00262,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00376,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00376,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00376,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00376,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00376,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00376,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00288,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00288,"percentile":0.20207}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"GITHUB_USER-ATTACHMENTS_FILES","name":"Files","source":"github","url":"https://github.com/user-attachments/files/16767988/ouch.crash.report.docx","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"GITHUB_ACADEMYSOFTWAREFOUNDATION_OPENIMAGEIO","name":"Openimageio","source":"github","url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/issues/3840","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":2,"weaknesses":[{"id":"CWE-122","name":"Heap-based Buffer Overflow","description":"A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/122.html"},{"id":"CWE-131","name":"Incorrect Calculation of Buffer Size","description":"The product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/131.html"},{"id":"CWE-787","name":"Out-of-bounds Write","description":"The product writes data past the end, or before the beginning, of the intended buffer.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/787.html"}],"affected":[{"vendor":"academysoftwarefoundation","product":"openimageio","name":"OpenImageIO","label":"openimageio","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.1.16.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.1.16.0","eol":null,"hubHref":"/vendor/academysoftwarefoundation/openimageio"},{"vendor":"ubuntu","product":"openimageio","name":"openimageio","label":"openimageio","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/openimageio","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"openimageio","product":"openimageio","name":"openimageio","label":"openimageio","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.1.16.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.1.16.0","eol":null,"hubHref":"/vendor/openimageio/openimageio"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-3wxw-rqhw-j2w4","label":"github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-3wxw-rqhw-j2w4","hostname":"github.com","tags":["X Refsource CONFIRM","REPORT","Exploit","Vendor Advisory"]},{"url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5296","label":"github.com/AcademySoftwareFoundation/OpenImageIO/pull/5296","hostname":"github.com","tags":["X Refsource MISC","REPORT","Issue Tracking","Patch"]},{"url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/6e9b86ee4cce8fd7bed6cfb101a266d8f8a296d4","label":"github.com/AcademySoftwareFoundation/OpenImageIO/commit/6e9b86ee4cce8fd7bed6cfb101a266d8f8a296d4","hostname":"github.com","tags":["X Refsource MISC","REPORT","Patch"]},{"url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0","label":"github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0","hostname":"github.com","tags":["X Refsource MISC","REPORT","Release Notes"]},{"url":"https://github.com/user-attachments/files/29615314/poc.zip","label":"github.com/user-attachments/files/29615314/poc.zip","hostname":"github.com","tags":["Exploit"]},{"url":"https://ubuntu.com/security/CVE-2026-67549","label":"ubuntu.com/security/CVE-2026-67549","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67549","label":"www.cve.org/CVERecord?id=CVE-2026-67549","hostname":"www.cve.org","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:11442-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:11442-1"]},"timeline":[{"kind":"published","date":"2026-09-18T15:49:38.085Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-24T20:57:37.310Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":40,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T21:38:13.312Z","stale":false,"partial":false}}