{"id":"CVE-2019-9754","aliases":["DEBIAN-CVE-2019-9754","EUVD-2019-19117","GHSA-wmfj-vmfg-mjxg","UBUNTU-CVE-2019-9754"],"status":"published","title":"An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source...","description":"An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 1 byte out of bounds write in the end_macro function in tccpp.c.","severity":{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.00875,"percentile":0.59191,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-787"],"published":"2019-03-13T22:00:00Z","modified":"2026-09-21T07:03:26Z","fixes":[{"ecosystem":"Debian:12","package":"tcc","fixed_in":["0.9.27+git20200814.62c30a4a-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"tcc","fixed_in":["0.9.27+git20200814.62c30a4a-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"tcc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.27+git20200814.62c30a4a-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"tcc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.27+git20200814.62c30a4a-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"tcc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.27~git20140923.9d7fb33-3ubuntu1","0.9.27~git20151227.933c223-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"tcc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.27~git20161217.cd9514ab-3ubuntu1","0.9.27-2","0.9.27-4","0.9.27-5"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"tcc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.27-8"]}],"products":[{"vendor":"tinycc","product":"tinycc"}],"references":[{"url":"https://lists.nongnu.org/archive/html/tinycc-devel/2019-03/msg00038.html","tags":["x_refsource_MISC","x_transferred","Exploit","Mailing List","Third Party Advisory","evidence","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-9754"},{"url":"https://github.com/advisories/GHSA-wmfj-vmfg-mjxg"},{"url":"https://security-tracker.debian.org/tracker/CVE-2019-9754","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2019-9754","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-9754","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2019-9754","description":"An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 1 byte out of bounds write in the end_macro function in tccpp.c.","status":"published","published":"2019-03-13T22:00:00Z","modified":"2024-09-17T00:11:36.031Z","updated_at":"2026-11-02T14:20:20.081405Z"}],"euvd":[{"id":"EUVD-2019-19117","description":"An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 1 byte out of bounds write in the end_macro function in tccpp.c.","status":"published","published":"2019-03-13T22:00:00Z","modified":"2024-09-17T00:11:36Z","updated_at":"2026-11-03T00:29:01.072419Z"}],"ghsa":[{"id":"GHSA-wmfj-vmfg-mjxg","title":"An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source...","description":"An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 1 byte out of bounds write in the end_macro function in tccpp.c.","status":"published","published":"2022-05-14T01:20:49Z","modified":"2023-02-02T05:03:43Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:51:41.689943Z"}],"nvd":[{"id":"CVE-2019-9754","description":"An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 1 byte out of bounds write in the end_macro function in tccpp.c.","status":"published","published":"2019-03-13T22:29:00.693Z","modified":"2026-06-17T02:44:17.457Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:05:07.268578Z"}],"osv":[{"id":"CVE-2019-9754","description":"An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 1 byte out of bounds write in the end_macro function in tccpp.c.","status":"published","published":"2019-03-13T22:29:00.693Z","modified":"2026-03-14T09:44:19.943365Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:12.974481Z"},{"id":"DEBIAN-CVE-2019-9754","description":"An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 1 byte out of bounds write in the end_macro function in tccpp.c.","status":"published","published":"2019-03-13T22:29:00.693Z","modified":"2026-09-21T07:03:26.557485603Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:32.57265Z"},{"id":"UBUNTU-CVE-2019-9754","description":"An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 1 byte out of bounds write in the end_macro function in tccpp.c.","status":"published","published":"2019-03-13T22:29:00Z","modified":"2026-04-22T12:23:52.909361Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:22.212782Z"}]}}