{"id":"CVE-2020-29573","aliases":["DEBIAN-CVE-2020-29573","EUVD-2020-21935","GHSA-x6gp-hg9r-wh46","RHSA-2021:0348","RHSA-2021:2813","RHSA-2021:2998","RHSA-2021:3315","SUSE-SU-2021:0653-1","SUSE-SU-2021:1165-1","SUSE-SU-2022:2886-1","SUSE-SU-2024:0759-1","UBUNTU-CVE-2020-29573","openSUSE-SU-2021:0358-1","openSUSE-SU-2024:10792-1"],"status":"published","title":"sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has...","description":"sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \\x00\\x04\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of \"Fixed for glibc 2.33\" in the 26649 reference.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.02723,"percentile":0.86168,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-787"],"published":"2020-12-05T23:18:58Z","modified":"2026-10-26T12:02:48Z","fixes":[{"ecosystem":"Debian:12","package":"glibc","fixed_in":["2.23-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"glibc","fixed_in":["2.23-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"glibc","fixed_in":["2.23-1"],"sources":["osv"]},{"ecosystem":"Red Hat:rhel_aus:7.4::server","package":"glibc","fixed_in":["0:2.17-196.el7_4.4"],"sources":["osv"]},{"ecosystem":"Red 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"url":"https://www.suse.com/security/cve/CVE-2017-18269","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-1000001","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-11236","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-11237","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-19591","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-6485","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-19126","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-7309","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-9169","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-10029","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-1752","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-6096","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-27645","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-33574","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2020-29573","description":"sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \\x00\\x04\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of \"Fixed for glibc 2.33\" in the 26649 reference.","status":"published","published":"2020-12-05T23:18:58Z","modified":"2026-10-14T09:44:40.835Z","updated_at":"2026-11-02T14:35:55.460269Z"}],"euvd":[{"id":"EUVD-2020-21935","description":"sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \\x00\\x04\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of \"Fixed for glibc 2.33\" in the 26649 reference.","status":"published","published":"2020-12-05T23:18:58Z","modified":"2026-10-14T09:44:40Z","updated_at":"2026-11-02T17:27:16.85534Z"}],"ghsa":[{"id":"GHSA-x6gp-hg9r-wh46","title":"sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has...","description":"sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \\x00\\x04\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x04 value to sprintf.","status":"published","published":"2022-05-24T17:35:26Z","modified":"2026-10-14T12:31:16Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:13:24.188405Z"}],"nvd":[{"id":"CVE-2020-29573","description":"sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \\x00\\x04\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of \"Fixed for glibc 2.33\" in the 26649 reference.","status":"published","published":"2020-12-06T00:15:11.567Z","modified":"2026-10-14T10:17:35.217Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:06:27.10541Z"}],"osv":[{"id":"CVE-2020-29573","description":"sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \\x00\\x04\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of \"Fixed for glibc 2.33\" in the 26649 reference.","status":"published","published":"2020-12-06T00:15:11.567Z","modified":"2026-10-24T10:30:57.342158212Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:16.612899Z"},{"id":"DEBIAN-CVE-2020-29573","description":"sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \\x00\\x04\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of \"Fixed for glibc 2.33\" in the 26649 reference.","status":"published","published":"2020-12-06T00:15:11.567Z","modified":"2026-10-26T12:02:48.348237539Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:34.019707Z"},{"id":"RHSA-2021:0348","title":"Red Hat Security Advisory: glibc security and bug fix update","status":"published","published":"2024-09-16T05:18:12Z","modified":"2026-10-15T10:01:43Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"RHSA-2021:2813","title":"Red Hat Security Advisory: glibc security update","status":"published","published":"2024-09-16T05:18:27Z","modified":"2026-10-15T10:02:00Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.619234Z"},{"id":"RHSA-2021:2998","title":"Red Hat Security Advisory: glibc security update","status":"published","published":"2024-09-16T05:18:33Z","modified":"2026-10-15T10:02:01Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.619234Z"},{"id":"RHSA-2021:3315","title":"Red Hat Security Advisory: glibc security and bug fix update","status":"published","published":"2024-09-16T05:18:40Z","modified":"2026-10-15T10:02:03Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.619234Z"},{"id":"UBUNTU-CVE-2020-29573","description":"sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \\x00\\x04\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of \"Fixed for glibc 2.33\" in the 26649 reference.","status":"published","published":"2020-12-06T00:15:00Z","modified":"2026-04-22T12:40:07.651073Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:24.541803Z"},{"id":"openSUSE-SU-2021:0358-1","title":"Security update for glibc","description":"This update for glibc fixes the following issues:\n\n- Fix buffer overrun in EUC-KR conversion module (CVE-2019-25013, bsc#1182117, BZ #24973)\n- x86: Harden printf against non-normal long double values (CVE-2020-29573, bsc#1179721, BZ #26649)\n- gconv: Fix assertion failure in ISO-2022-JP-3 module (CVE-2021-3326, bsc#1181505, BZ #27256)\n- iconv: Accept redundant shift sequences in IBM1364 (CVE-2020-27618, bsc#1178386, BZ #26224)\n- iconv: Fix incorrect UCS4 inner loop bounds (CVE-2020-29562, bsc#1179694, BZ #26923)\n- Fix parsing of /sys/devices/system/cpu/online (bsc#1180038, BZ #25859)\n\nThis update was imported from the SUSE:SLE-15:Update update project.","status":"published","published":"2021-02-27T21:33:28Z","modified":"2026-02-04T03:25:32.427281Z","updated_at":"2026-11-02T16:58:31.879684Z"},{"id":"openSUSE-SU-2024:10792-1","title":"glibc-2.34-1.2 on GA media","description":"These are all security issues fixed in the glibc-2.34-1.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:52:58.912445Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"SUSE-SU-2021:0653-1","title":"Security update for glibc","description":"This update for glibc fixes the following issues:\n\n- Fix buffer overrun in EUC-KR conversion module (CVE-2019-25013, bsc#1182117, BZ #24973)\n- x86: Harden printf against non-normal long double values (CVE-2020-29573, bsc#1179721, BZ #26649)\n- gconv: Fix assertion failure in ISO-2022-JP-3 module (CVE-2021-3326, bsc#1181505, BZ #27256)\n- iconv: Accept redundant shift sequences in IBM1364 (CVE-2020-27618, bsc#1178386, BZ #26224)\n- iconv: Fix incorrect UCS4 inner loop bounds (CVE-2020-29562, bsc#1179694, BZ #26923)\n- Fix parsing of /sys/devices/system/cpu/online (bsc#1180038, BZ #25859)\n","status":"published","published":"2021-02-26T18:54:31Z","modified":"2026-02-04T03:31:03.44528Z","updated_at":"2026-11-02T15:53:48.690034Z"},{"id":"SUSE-SU-2021:1165-1","title":"Security update for glibc","description":"This update for glibc fixes the following issues:\n\n- CVE-2020-27618: Accept redundant shift sequences in IBM1364 (bsc#1178386)\n- CVE-2020-29562: Fix incorrect UCS4 inner loop bounds (bsc#1179694)\n- CVE-2020-29573: Harden printf against non-normal long double values (bsc#1179721)\n- Check vector support in memmove ifunc-selector (bsc#1184034)\n","status":"published","published":"2021-04-13T12:03:25Z","modified":"2026-02-04T03:36:16.454071Z","updated_at":"2026-11-02T15:53:49.138643Z"},{"id":"SUSE-SU-2022:2886-1","title":"Security update for glibc","description":"This update for glibc fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2015-5180: Fix crash with internal QTYPE in resolv (bsc#941234, BZ #18784)\n- CVE-2016-10228: Rewrite iconv option parsing (bsc#1027496, BZ #19519)\n- CVE-2019-25013: Fix buffer overrun in EUC-KR conversion module (bsc#1182117, BZ #24973)\n- CVE-2020-27618: Accept redundant shift sequences in IBM1364 iconv module (bsc#1178386, BZ #26224)\n- CVE-2020-29562: Fix incorrect UCS4 inner loop bounds in iconv (bsc#1179694, BZ #26923)\n- CVE-2020-29573: Hardened printf against non-normal long double values (bsc#1179721, BZ #26649)\n- CVE-2021-3326: Fix assertion failure in ISO-2022-JP-3 gconv module (bsc#1181505, BZ #27256)\n\n- Recognize ppc64p7 arch to build for power7\n","status":"published","published":"2022-08-24T13:04:08Z","modified":"2026-02-04T02:33:17.772119Z","updated_at":"2026-11-02T15:53:50.965375Z"},{"id":"SUSE-SU-2024:0759-1","title":"Security update for glibc","description":"This update for glibc fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2020-29573: x86: printf was hardened against non-normal long double values (bsc#1179721, BZ #26649)\n- CVE-2021-3326: Fix assertion failure in gconv ISO-2022-JP-3 module (bsc#1181505, BZ #27256)\n- CVE-2019-25013: Fix buffer overrun in EUC-KR conversion module (bsc#1182117, BZ #24973)\n- CVE-2020-27618: Accept redundant shift sequences in IBM1364 iconv (bsc#1178386, BZ #26224)\n- CVE-2020-29562: Fix incorrect UCS4 inner loop bounds in iconv (bsc#1179694, BZ #26923)\n\n- Schedule nscd cache pruning more accurately from re-added values (bsc#1018158)\n","status":"published","published":"2024-03-05T10:25:27Z","modified":"2026-02-04T04:29:26.641733Z","updated_at":"2026-11-02T15:53:54.239786Z"}]}}