{"schemaVersion":3,"id":"CVE-2021-42716","aliases":["openSUSE-SU-2022:0018-1","UBUNTU-CVE-2021-42716","DEBIAN-CVE-2021-42716"],"status":"published","duplicateOf":null,"title":null,"description":"An issue was discovered in stb stb_image.h 2.27. The PNM loader incorrectly interpreted 16-bit PGM files as 8-bit when converting to RGBA, leading to a buffer overflow when later reinterpreting the result as a 16-bit buffer. An attacker could potentially have crashed a service using stb_image, or read up to 1024 bytes of non-consecutive heap data without control over the read location.","dates":{"published":"2021-10-21T18:36:39.000Z","modified":"2024-08-04T03:38:49.348Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.1,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.1,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","exploitability":4.6,"impact":8.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":7.1,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","exploitability":4.6,"impact":8.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.1,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5.8,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:P/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01456,"percentile":0.73129,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":-0.007000000000000062,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.01463},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01456,"percentile":0.73129}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01463,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01456,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01456,"percentile":0.73129}]},"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_NOTHINGS_STB","name":"Stb","source":"github","url":"https://github.com/nothings/stb/issues/1964","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')","description":"The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/120.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},{"text":"< 0.0~git20230129.5736b15+ds-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 0.0~git20230129.5736b15+ds-1","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":"fedoraproject","product":"fedora","name":"fedora","label":"fedora","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"33","noFixRecorded":false,"fixedIn":null},{"text":"34","noFixRecorded":false,"fixedIn":null},{"text":"35","noFixRecorded":false,"fixedIn":null}],"versionsText":"33 | 34 | 35","eol":{"isEol":true,"eolDate":"2021-11-30T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"33","label":"33","eolFrom":"2021-11-30T00:00:00.000Z","isLts":false,"isMaintained":false,"latestVersion":null},"product":{"name":"fedora","label":"Fedora Linux","category":"os"}},"hubHref":"/vendor/fedoraproject/fedora"},{"vendor":"nothings","product":"stb_image.h","name":"stb image.h","label":"stb_image.h","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"2.27","noFixRecorded":false,"fixedIn":null}],"versionsText":"2.27","eol":null,"hubHref":"/vendor/nothings/stb_imageh"},{"vendor":"opensuse","product":"stb&distro=openSUSE Leap 15.3","name":"stb","label":"stb&distro=openSUSE Leap 15.3","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/stb&distro=openSUSE Leap 15.3","purlType":"rpm","versions":[{"text":"< 2.32.1549563867.59e9702-bp153.2.3.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.32.1549563867.59e9702-bp153.2.3.1","eol":null,"hubHref":null},{"vendor":"suse","product":"stb&distro=SUSE Package Hub 15 SP3","name":"stb","label":"stb&distro=SUSE Package Hub 15 SP3","ecosystem":"SUSE Linux Enterprise","cpePart":null,"purl":"pkg:rpm/suse/stb&distro=SUSE Package Hub 15 SP3","purlType":"rpm","versions":[{"text":"< 2.32.1549563867.59e9702-bp153.2.3.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.32.1549563867.59e9702-bp153.2.3.1","eol":null,"hubHref":null}],"affectedCount":6,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://github.com/nothings/stb/issues/1166","label":"github.com/nothings/stb/issues/1166","hostname":"github.com","tags":["X Refsource MISC","REPORT","Exploit","Issue Tracking","Third Party Advisory"]},{"url":"https://github.com/nothings/stb/pull/1223","label":"github.com/nothings/stb/pull/1223","hostname":"github.com","tags":["X Refsource MISC","REPORT","Third Party Advisory"]},{"url":"https://github.com/nothings/stb/issues/1225","label":"github.com/nothings/stb/issues/1225","hostname":"github.com","tags":["X Refsource MISC","REPORT","Exploit","Issue Tracking","Third Party Advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G2M5CRSGPRF7G3YB5CLU4FXW7ANNHAYT/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","X Refsource FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ID6II3RIKAMVGVMC6ZAQIXXYYDMTVC4N/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","X Refsource FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BEGXBDEMTFGINETMJENBZ6SCHVEJQJSY/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","X Refsource FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CI23LXPEV2GCDQTJSKO6CIILBDTI3R42/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","X Refsource FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FTZXHFZD36BGE5P6JF252NZZLKMGCY4T/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","X Refsource FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VP2YEXEAJWI76FPM7D7VXHWD3WESQEYC/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","X Refsource FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3TDGZFLBOP27LZKLH45WQLSNPSPP7S7Z/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","X Refsource FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AF2CNP4FVC6LDKNOO4WDCGNDYIP3MPK6/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","X Refsource FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TXX76TJMZBPN3NU542MGN6B7C7QHRFGB/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","X Refsource FEDORA"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/G7QRUVRJT5W72APQEDYOZEMCHXZ5CMDO/","label":"lists.opensuse.org/archives/…","hostname":"lists.opensuse.org","tags":["Advisory"]},{"url":"https://bugzilla.suse.com/1191743","label":"bugzilla.suse.com/1191743","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://www.suse.com/security/cve/CVE-2021-42716","label":"www.suse.com/security/cve/CVE-2021-42716","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://ubuntu.com/security/CVE-2021-42716","label":"ubuntu.com/security/CVE-2021-42716","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-42716","label":"www.cve.org/CVERecord?id=CVE-2021-42716","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-42716","label":"security-tracker.debian.org/tracker/CVE-2021-42716","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["MGASA-2021-0549","MGASA-2022-0074","OPENSUSE-SU-2022:0157-1","SUSE-SU-2022:0157-1","SUSE-SU-2022:0163-1"],"duplicates":[],"related":["OPENSUSE-SU-2022:0157-1","SUSE-SU-2022:0157-1","SUSE-SU-2022:0163-1"]},"timeline":[{"kind":"published","date":"2021-10-21T18:36:39.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T03:38:49.348Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":39,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T14:30:49.843Z","stale":false,"partial":false}}