{"schemaVersion":3,"id":"CVE-2023-45666","aliases":["UBUNTU-CVE-2023-45666","DEBIAN-CVE-2023-45666"],"status":"published","duplicateOf":null,"title":null,"description":"stb_image is a single file MIT licensed library for processing images.  It may look like `stbi__load_gif_main` doesn’t give guarantees about the content of output value `*delays` upon failure. Although it sets `*delays` to zero at the beginning, it doesn’t do it in case the image is not recognized as GIF and a call to `stbi__load_gif_main_outofmem` only frees possibly allocated memory in `*delays` without resetting it to zero. Thus it would be fair to say the caller of `stbi__load_gif_main` is responsible to free the allocated memory in `*delays` only if `stbi__load_gif_main` returns a non null value. However at the same time the function may return null value, but fail to free the memory in `*delays` if internally `stbi__convert_format` is called and fails. Thus the issue may lead to a memory leak if the caller chooses to free `delays` only when `stbi__load_gif_main` didn’t fail or to a double-free if the `delays` is always freed","dates":{"published":"2023-10-20T23:26:42.620Z","modified":"2025-02-13T17:14:06.442Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.3,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":10,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":10,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00959,"percentile":0.6088,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00959},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00959,"percentile":0.6088}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00959,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00959,"percentile":0.6088}]},"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":[],"exploitCount":0,"weaknesses":[{"id":"CWE-415","name":"Double Free","description":"The product calls free() twice on the same memory address.","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/415.html"}],"affected":[{"vendor":"debian","product":"libstb","name":"libstb","label":"libstb","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/libstb","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"libstb","name":"libstb","label":"libstb","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libstb","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"nothings","product":"stb","name":"stb","label":"stb","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 2.28","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 2.28","eol":null,"hubHref":"/vendor/nothings/stb"},{"vendor":"nothings","product":"stb_image.h","name":"stb image.h","label":"stb_image.h","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"2.28","noFixRecorded":false,"fixedIn":null}],"versionsText":"2.28","eol":null,"hubHref":"/vendor/nothings/stb_imageh"}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://securitylab.github.com/advisories/GHSL-2023-145_GHSL-2023-151_stb_image_h/","label":"securitylab.github.com/advisories/GHSL-2023-145_GHSL-2023-151_stb_image_h/","hostname":"securitylab.github.com","tags":["X Refsource CONFIRM","REPORT","Third Party Advisory"]},{"url":"https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_image.h#L6957","label":"github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_image.h","hostname":"github.com","tags":["X Refsource MISC","REPORT","Third Party Advisory"]},{"url":"https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_image.h#L6962-L7045","label":"github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_image.h","hostname":"github.com","tags":["X Refsource MISC","REPORT","Third Party Advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UVQ7ONFH5GWLMXYEAJG32A3EUKUCEVCR/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":[]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QVABVF4GEM6BYD5L4L64RCRSXUHY6LGN/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":[]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NMXKOKPP4BKTNUTF5KSRDQAWOUILQZNO/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":[]},{"url":"https://ubuntu.com/security/CVE-2023-45666","label":"ubuntu.com/security/CVE-2023-45666","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-45666","label":"www.cve.org/CVERecord?id=CVE-2023-45666","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-45666","label":"security-tracker.debian.org/tracker/CVE-2023-45666","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2023-10-20T23:26:42.620Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-02-13T17:14:06.442Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T03:03:42.665Z","stale":false,"partial":false}}