{"id":"CVE-2015-3027","aliases":["EUVD-2015-3108","GHSA-8ghm-9gv2-jj69","UBUNTU-CVE-2015-3027"],"status":"published","title":"Clang in LLVM, as used in Apple Xcode before 6.3, performs incorrect register allocation in a way...","description":"Clang in LLVM, as used in Apple Xcode before 6.3, performs incorrect register allocation in a way that triggers stack storage for stack cookie pointers, which might allow context-dependent attackers to bypass a stack-guard protection mechanism via crafted input to an affected C program.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01299,"percentile":0.70604,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-264"],"published":"2015-04-10T14:00:00Z","modified":"2026-06-17T00:25:09Z","affected":[{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"llvm-toolchain-3.6","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:3.6-2ubuntu1~trusty1","1:3.6-2ubuntu1~trusty2"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"llvm-toolchain-3.6","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:3.6.2-1","1:3.6.2-3","1:3.6.2-3build1","1:3.6.2-3ubuntu1","1:3.6.2-3ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"llvm-toolchain-3.5","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:3.5.2-2","1:3.5.2-3","1:3.5.2-3build1","1:3.5.2-3build2","1:3.5.2-3ubuntu1"]}],"products":[{"vendor":"apple","product":"xcode"}],"references":[{"url":"https://support.apple.com/HT204663","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"http://www.securitytracker.com/id/1032081","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://www.securityfocus.com/bid/73987","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://lists.apple.com/archives/security-announce/2015/Apr/msg00004.html","tags":["vendor-advisory","x_refsource_APPLE","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2015-3027"},{"url":"https://github.com/advisories/GHSA-8ghm-9gv2-jj69"},{"url":"https://ubuntu.com/security/CVE-2015-3027","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2015-3027","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2015-3027","description":"Clang in LLVM, as used in Apple Xcode before 6.3, performs incorrect register allocation in a way that triggers stack storage for stack cookie pointers, which might allow context-dependent attackers to bypass a stack-guard protection mechanism via crafted input to an affected C program.","status":"published","published":"2015-04-10T14:00:00Z","modified":"2024-08-06T05:32:21.284Z","updated_at":"2026-11-02T14:35:41.976732Z"}],"euvd":[{"id":"EUVD-2015-3108","description":"Clang in LLVM, as used in Apple Xcode before 6.3, performs incorrect register allocation in a way that triggers stack storage for stack cookie pointers, which might allow context-dependent attackers to bypass a stack-guard protection mechanism via crafted input to an affected C program.","status":"published","published":"2015-04-10T14:00:00Z","modified":"2024-08-06T05:32:21Z","updated_at":"2026-11-03T02:22:09.620925Z"}],"ghsa":[{"id":"GHSA-8ghm-9gv2-jj69","title":"Clang in LLVM, as used in Apple Xcode before 6.3, performs incorrect register allocation in a way...","description":"Clang in LLVM, as used in Apple Xcode before 6.3, performs incorrect register allocation in a way that triggers stack storage for stack cookie pointers, which might allow context-dependent attackers to bypass a stack-guard protection mechanism via crafted input to an affected C program.","status":"published","published":"2022-05-17T03:33:20Z","modified":"2023-01-27T05:08:34Z","updated_at":"2026-11-02T14:43:18.939561Z"}],"nvd":[{"id":"CVE-2015-3027","description":"Clang in LLVM, as used in Apple Xcode before 6.3, performs incorrect register allocation in a way that triggers stack storage for stack cookie pointers, which might allow context-dependent attackers to bypass a stack-guard protection mechanism via crafted input to an affected C program.","status":"published","published":"2015-04-10T15:00:11.443Z","modified":"2026-06-17T00:25:09.403Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-264"],"updated_at":"2026-11-02T14:03:04.095849Z"}],"osv":[{"id":"UBUNTU-CVE-2015-3027","description":"Clang in LLVM, as used in Apple Xcode before 6.3, performs incorrect register allocation in a way that triggers stack storage for stack cookie pointers, which might allow context-dependent attackers to bypass a stack-guard protection mechanism via crafted input to an affected C program.","status":"published","published":"2015-04-10T15:00:00Z","modified":"2026-04-22T10:07:08.716619Z","updated_at":"2026-11-02T15:54:10.045446Z"}]}}