{"id":"CVE-2019-15847","aliases":["ALPINE-CVE-2019-15847","DEBIAN-CVE-2019-15847","EUVD-2019-6763","GHSA-rf68-2835-83vw","RHSA-2020:0924","RHSA-2020:1864","RHSA-2020:2274","SUSE-SU-2019:2702-1","SUSE-SU-2019:3061-1","SUSE-SU-2020:0394-1","SUSE-SU-2023:3662-1","UBUNTU-CVE-2019-15847","openSUSE-SU-2019:2364-1","openSUSE-SU-2019:2365-1","openSUSE-SU-2020:0716-1","openSUSE-SU-2024:10703-1"],"status":"published","title":"The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple...","description":"The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple calls of the __builtin_darn intrinsic into a single call, thus reducing the entropy of the random number generator. This occurred because a volatile operation was not specified. For example, within a single execution of a program, the output of every __builtin_darn() call may be the same.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.03181,"percentile":0.88155,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-331"],"published":"2019-09-02T22:03:34Z","modified":"2026-10-24T10:30:43Z","fixes":[{"ecosystem":"Alpine:v3.11","package":"gcc","fixed_in":["9.3.0-r0"],"sources":["osv"]},{"ecosystem":"Debian:11","package":"gcc-9","fixed_in":["9.2.1-7"],"sources":["osv"]},{"ecosystem":"Red Hat:rhel_software_collections:3::el6","package":"devtoolset-8-gcc","fixed_in":["0:8.3.1-3.2.el6"],"sources":["osv"]},{"ecosystem":"Red Hat:rhel_software_collections:3::el6","package":"devtoolset-8-gcc-c++","fixed_in":["0:8.3.1-3.2.el6"],"sources":["osv"]},{"ecosystem":"Red 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For example, within a single execution of a program, the output of every __builtin_darn() call may be the same.","status":"published","published":"2019-09-02T23:15:10.837Z","modified":"2026-09-21T06:17:52.493997161Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:27:47.663013Z"},{"id":"CVE-2019-15847","description":"The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple calls of the __builtin_darn intrinsic into a single call, thus reducing the entropy of the random number generator. This occurred because a volatile operation was not specified. For example, within a single execution of a program, the output of every __builtin_darn() call may be the same.","status":"published","published":"2019-09-02T23:15:10.837Z","modified":"2026-10-24T10:30:43.882596703Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:11.361782Z"},{"id":"DEBIAN-CVE-2019-15847","description":"The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple calls of the __builtin_darn intrinsic into a single call, thus reducing the entropy of the random number generator. This occurred because a volatile operation was not specified. For example, within a single execution of a program, the output of every __builtin_darn() call may be the same.","status":"published","published":"2019-09-02T23:15:10.837Z","modified":"2026-08-29T07:02:14.605967683Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:31.867036Z"},{"id":"RHSA-2020:0924","title":"Red Hat Security Advisory: devtoolset-8-gcc security update","status":"published","published":"2024-09-13T16:16:15Z","modified":"2026-10-14T10:01:18Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:53:06.535721Z"},{"id":"RHSA-2020:1864","title":"Red Hat Security Advisory: gcc security and bug fix update","status":"published","published":"2024-09-13T16:17:48Z","modified":"2026-10-14T10:01:22Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:53:07.072948Z"},{"id":"RHSA-2020:2274","title":"Red Hat Security Advisory: devtoolset-9-gcc security and bug fix update","status":"published","published":"2024-09-13T16:18:51Z","modified":"2026-10-14T10:01:24Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:53:07.072948Z"},{"id":"UBUNTU-CVE-2019-15847","description":"The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple calls of the __builtin_darn intrinsic into a single call, thus reducing the entropy of the random number generator. This occurred because a volatile operation was not specified. For example, within a single execution of a program, the output of every __builtin_darn() call may be the same.","status":"published","published":"2019-09-02T23:15:00Z","modified":"2026-10-17T12:56:57.744963177Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:54:19.6877Z"},{"id":"openSUSE-SU-2019:2364-1","title":"Security update for gcc7","description":"This update for gcc7 to r275405 fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2019-14250: Fixed an integer overflow in binutils (bsc#1142649).\n- CVE-2019-15847: Fixed an optimization in the POWER9 backend of gcc that could reduce the entropy of the random number generator (bsc#1149145).\n\nNon-security issue fixed:\n\n- Move Live Patching technology stack from kGraft to upstream klp (bsc#1071995, fate#323487).\n\nThis update was imported from the SUSE:SLE-15:Update update project.","status":"published","published":"2019-10-22T14:23:29Z","modified":"2026-02-04T02:49:08.001777Z","updated_at":"2026-11-02T16:58:30.784344Z"},{"id":"openSUSE-SU-2019:2365-1","title":"Security update for gcc7","description":"This update for gcc7 to r275405 fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2019-14250: Fixed an integer overflow in binutils (bsc#1142649).\n- CVE-2019-15847: Fixed an optimization in the POWER9 backend of gcc that could reduce the entropy of the random number generator (bsc#1149145).\n\nNon-security issue fixed:\n\n- Move Live Patching technology stack from kGraft to upstream klp (bsc#1071995, fate#323487).\n\nThis update was imported from the SUSE:SLE-15:Update update project.","status":"published","published":"2019-10-22T16:20:44Z","modified":"2026-02-04T04:14:29.011786Z","updated_at":"2026-11-02T16:58:30.784344Z"},{"id":"openSUSE-SU-2020:0716-1","title":"Security update for gcc9","description":"\n\nThis update includes the GNU Compiler Collection 9.\n\nThis update ships the GCC 9.3 release.\n\nA full changelog is provided by the GCC team on:\n\n   https://www.gnu.org/software/gcc/gcc-9/changes.html\n\n\nThe base system compiler libraries libgcc_s1, libstdc++6 and others are\nnow built by the gcc 9 packages.\n\nTo use it, install 'gcc9' or 'gcc9-c++' or other compiler brands and use CC=gcc-9 /\nCXX=g++-9 during configuration for using it.\n\n\nSecurity issues fixed:\n\n- CVE-2019-15847: Fixed a miscompilation in the POWER9 back end, that optimized multiple calls of the __builtin_darn intrinsic into a single call. (bsc#1149145)\n- CVE-2019-14250: Fixed a heap overflow in the LTO linker. (bsc#1142649)\n\nNon-security issues fixed:\n\n- Split out libstdc++ pretty-printers into a separate package supplementing gdb and the installed runtime. (bsc#1135254)\n- Fixed miscompilation for vector shift on s390. (bsc#1141897)\n- Includes a fix for Internal compiler error when building HepMC (bsc#1167898)\n- Includes fix for binutils version parsing\n- Add libstdc++6-pp provides and conflicts to avoid file conflicts\n  with same minor version of libstdc++6-pp from gcc10.\n- Add gcc9 autodetect -g at lto link (bsc#1149995)\n- Install go tool buildid for bootstrapping go\n","status":"published","published":"2020-05-26T05:35:19Z","modified":"2026-02-04T02:35:54.583034Z","updated_at":"2026-11-02T16:58:31.152112Z"},{"id":"openSUSE-SU-2024:10703-1","title":"cpp7-7.5.0+r278197-10.1 on GA media","description":"These are all security issues fixed in the cpp7-7.5.0+r278197-10.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:18:29.482237Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"SUSE-SU-2019:2702-1","title":"Security update for gcc7","description":"This update for gcc7 to r275405 fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2019-14250: Fixed an integer overflow in binutils (bsc#1142649).\n- CVE-2019-15847: Fixed an optimization in the POWER9 backend of gcc that could reduce the entropy of the random number generator (bsc#1149145).\n\nNon-security issue fixed:\n\n- Move Live Patching technology stack from kGraft to upstream klp (bsc#1071995, fate#323487).\n","status":"published","published":"2019-10-16T16:41:48Z","modified":"2026-02-04T04:35:01.708951Z","updated_at":"2026-11-02T15:53:47.06185Z"},{"id":"SUSE-SU-2019:3061-1","title":"Security update for gcc9","description":"\n\nThis update includes the GNU Compiler Collection 9.\n\nA full changelog is provided by the GCC team on:\n\n   https://www.gnu.org/software/gcc/gcc-9/changes.html\n\n\nThe base system compiler libraries libgcc_s1, libstdc++6 and others are\nnow built by the gcc 9 packages.\n\nTo use it, install 'gcc9' or 'gcc9-c++' or other compiler brands and use CC=gcc-9 /\nCXX=g++-9 during configuration for using it.\n\n\nSecurity issues fixed:\n\n- CVE-2019-15847: Fixed a miscompilation in the POWER9 back end, that optimized multiple calls of the __builtin_darn intrinsic into a single call. (bsc#1149145)\n- CVE-2019-14250: Fixed a heap overflow in the LTO linker. (bsc#1142649)\n\nNon-security issues fixed:\n\n- Split out libstdc++ pretty-printers into a separate package supplementing gdb and the installed runtime. (bsc#1135254)\n- Fixed miscompilation for vector shift on s390. (bsc#1141897)\n","status":"published","published":"2019-11-25T16:34:42Z","modified":"2025-05-02T04:08:49.136257Z","updated_at":"2026-11-02T15:53:47.06185Z"},{"id":"SUSE-SU-2020:0394-1","title":"Security update for gcc9","description":"This update for gcc9 fixes the following issues:\n\nThe GNU Compiler Collection is shipped in version 9.\n\nA detailed changelog on what changed in GCC 9 is available at https://gcc.gnu.org/gcc-9/changes.html\n\nThe compilers have been added to the SUSE Linux Enterprise Toolchain Module.\n\nTo use these compilers, install e.g. gcc9, gcc9-c++ and build with CC=gcc-9\nCXX=g++-9 set.\n\n\nFor SUSE Linux Enterprise base products, the libstdc++6, libgcc_s1 and\nother compiler libraries have been switched from their gcc8 variants to\ntheir gcc9 variants.\n\nSecurity issues fixed:\n\n- CVE-2019-15847: Fixed a miscompilation in the POWER9 back end, that optimized multiple calls of the __builtin_darn intrinsic into a single call. (bsc#1149145)\n- CVE-2019-14250: Fixed a heap overflow in the LTO linker. (bsc#1142649)\n\nNon-security issues fixed:\n\n- Split out libstdc++ pretty-printers into a separate package supplementing gdb and the installed runtime. (bsc#1135254)\n- Fixed miscompilation for vector shift on s390. (bsc#1141897)\n","status":"published","published":"2020-04-14T15:26:08Z","modified":"2026-02-04T04:21:55.328249Z","updated_at":"2026-11-02T15:53:47.06185Z"},{"id":"SUSE-SU-2023:3662-1","title":"Security update for gcc7","description":"This update for gcc7 fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2023-4039: Fixed incorrect stack protector for C99 VLAs on Aarch64 (bsc#1214052).\n- CVE-2019-15847: Fixed POWER9 DARN miscompilation.  (bsc#1149145)\n- CVE-2019-14250: Includes fix for LTO linker plugin heap overflow.  (bsc#1142649)\n\nUpdate to GCC 7.5.0 release.\n\nOther changes:\n\n- Fixed KASAN kernel compile. (bsc#1205145)\n- Fixed ICE with C++17 code. (bsc#1204505)\n- Fixed altivec.h redefining bool in C++ which makes bool unusable (bsc#1195517):\n- Adjust gnats idea of the target, fixing the build of gprbuild.  [bsc#1196861]\n- Do not handle exceptions in std::thread (jsc#CAR-1182)\n- add -fpatchable-function-entry feature to gcc-7.\n- Fixed glibc namespace violation with getauxval. (bsc#1167939)\n- Backport aarch64 Straight Line Speculation mitigation [bsc#1172798, CVE-2020-13844]\n- Enable fortran for the nvptx offload compiler. \n- Update README.First-for.SuSE.packagers\n- Avoid assembler errors with AVX512 gather and scatter instructions when using -masm=intel.\n- Backport the aarch64 -moutline-atomics feature and accumulated fixes but not its\n  default enabling.  (jsc#SLE-12209, bsc#1167939)\n- Fixed memcpy miscompilation on aarch64.  (bsc#1178624, bsc#1178577)\n- Fixed debug line info for try/catch.  (bsc#1178614)\n- Fixed corruption of pass private -\u003eaux via DF. (gcc#94148)\n- Fixed debug information issue with inlined functions and passed by reference arguments. [gcc#93888]\n- Fixed register allocation issue with exception handling code on s390x.  (bsc#1161913)\n- Backport PR target/92692 to fix miscompilation of some atomic code on aarch64. (bsc#1150164)\n- Fixed miscompilation in vectorized code for s390x.  (bsc#1160086) [gcc#92950]\n- Fixed miscompilation with thread-safe local static initialization.  [gcc#85887]\n- Fixed debug info created for array definitions that complete an earlier declaration.  [bsc#1146475]\n- Fixed vector shift miscompilation on s390.  (bsc#1141897)\n- Add gcc7 -flive-patching patch.  [bsc#1071995, fate#323487]\n- Strip -flto from $optflags.\n- Disables switch jump-tables when retpolines are used.  (bsc#1131264, jsc#SLE-6738)\n- Fixed ICE compiling tensorflow on aarch64.  (bsc#1129389)\n- Fixed for aarch64 FMA steering pass use-after-free.  (bsc#1128794)\n- Fixed ICE compiling tensorflow.  (bsc#1129389)\n- Fixed s390x FP load-and-test issue.  (bsc#1124644)\n- Adjust gnat manual entries in the info directory.  (bsc#1114592)\n- Fixed to no longer try linking -lieee with -mieee-fp.  (bsc#1084842)\n","status":"published","published":"2023-09-18T19:48:26Z","modified":"2026-02-04T03:00:32.338586Z","updated_at":"2026-11-02T15:53:53.440387Z"}]}}