{"id":"CVE-2018-20796","aliases":["BELL-CVE-2018-20796","DEBIAN-CVE-2018-20796","EUVD-2018-13339","GHSA-7x29-5q3f-f4x2","ROOT-OS-DEBIAN-12-CVE-2018-20796","ROOT-OS-DEBIAN-13-CVE-2018-20796","UBUNTU-CVE-2018-20796"],"status":"published","title":"In the GNU C Library (aka glibc or libc6) through 2.29, check_dst_limits_calc_pos_1 in posix...","description":"In the GNU C Library (aka glibc or libc6) through 2.29, check_dst_limits_calc_pos_1 in posix/regexec.c has Uncontrolled Recursion, as demonstrated by '(\\227|)(\\\\1\\\\1|t1|\\\\\\2537)+' in grep.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.05804,"percentile":0.93183,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-674"],"published":"2019-02-26T02:00:00Z","modified":"2026-11-04T11:15:06Z","fixes":[{"ecosystem":"Root:Debian:12","package":"glibc","fixed_in":["2.36-9+deb12u14.root.io.18","2.36-9+deb12u14.root.io.19","2.36-9+deb12u14.aikido.20","2.36-9+deb12u14.aikido.21","2.36-9+deb12u14.aikido.22","2.36-9+deb12u14.aikido.23","2.36-9+deb12u14.aikido.24"],"sources":["osv"]},{"ecosystem":"Root:Debian:12","package":"rootio-glibc","fixed_in":["2.36-9+deb12u14.root.io.18","2.36-9+deb12u14.root.io.19","2.36-9+deb12u14.aikido.20","2.36-9+deb12u14.aikido.21","2.36-9+deb12u14.aikido.22","2.36-9+deb12u14.aikido.23","2.36-9+deb12u14.aikido.24"],"sources":["osv"]},{"ecosystem":"Root:Debian:13","package":"glibc","fixed_in":["2.41-12+deb13u4.aikido.13","2.41-12+deb13u4.aikido.14"],"sources":["osv"]},{"ecosystem":"Root:Debian:13","package":"rootio-glibc","fixed_in":["2.41-12+deb13u4.aikido.13","2.41-12+deb13u4.aikido.14"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.36-10~0","2.36-9","2.36-9+deb12u1","2.36-9+deb12u10","2.36-9+deb12u11","2.36-9+deb12u12","2.36-9+deb12u13","2.36-9+deb12u14","2.36-9+deb12u2","2.36-9+deb12u3","2.36-9+deb12u4","2.36-9+deb12u5","2.36-9+deb12u6","2.36-9+deb12u7","2.36-9+deb12u8","2.36-9+deb12u9","2.36-9+loong64","2.37-1","2.37-10","2.37-11","2.37-12","2.37-13","2.37-14","2.37-15","2.37-15.1","2.37-15.1+sh4","2.37-15~deb13u1","2.37-16","2.37-17","2.37-18","2.37-19","2.37-2","2.37-3","2.37-4","2.37-5","2.37-6","2.37-7","2.37-8","2.37-9","2.38-1","2.38-10","2.38-11","2.38-12","2.38-12.1","2.38-13","2.38-14","2.38-15~0","2.38-15~1","2.38-2","2.38-3","2.38-4","2.38-5","2.38-6","2.38-7","2.38-7~0+hurd.1","2.38-8","2.38-9","2.39-1","2.39-2","2.39-3","2.39-3.1","2.39-4","2.39-5","2.39-6","2.39-6+hurd.1","2.39-6+sh4","2.39-7","2.39-7+sh4","2.39-7~0","2.39-8~0","2.40-1","2.40-2","2.40-2+sh4","2.40-3","2.40-3+sh4","2.40-4","2.40-5","2.40-5~hurd.1","2.40-6","2.40-6~1","2.40-7","2.41-1","2.41-10","2.41-11","2.41-12","2.41-13~hurd.0","2.41-13~hurd.1","2.41-2","2.41-3","2.41-4","2.41-4~0","2.41-5","2.41-5~0","2.41-6","2.41-7","2.41-8","2.41-8~0","2.41-8~1","2.41-9","2.41-9~0","2.41-9~1","2.42-1","2.42-10","2.42-11","2.42-12","2.42-12~hurd.1","2.42-13","2.42-14","2.42-14~hurd.1","2.42-15","2.42-15~hurd.1","2.42-16","2.42-17","2.42-2","2.42-3","2.42-4","2.42-5","2.42-6","2.42-7","2.42-8","2.42-8~hurd.1","2.42-8~hurd.2","2.42-9","2.43-1","2.43-2","2.43-3","2.43-3+m68k","2.43-4","2.43-4+m68k","2.43-5","2.43-6","2.43-7","2.43-7~hurd.1","2.44-1","2.44-2","2.44-3"]},{"source":"osv","ecosystem":"Debian:13","package":"glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.41-12","2.41-12+deb13u1","2.41-12+deb13u2","2.41-12+deb13u3","2.41-12+deb13u4","2.41-13~hurd.0","2.41-13~hurd.1","2.42-1","2.42-10","2.42-11","2.42-12","2.42-12~hurd.1","2.42-13","2.42-14","2.42-14~hurd.1","2.42-15","2.42-15~hurd.1","2.42-16","2.42-17","2.42-2","2.42-3","2.42-4","2.42-5","2.42-6","2.42-7","2.42-8","2.42-8~hurd.1","2.42-8~hurd.2","2.42-9","2.43-1","2.43-2","2.43-3","2.43-3+m68k","2.43-4","2.43-4+m68k","2.43-5","2.43-6","2.43-7","2.43-7~hurd.1","2.44-1","2.44-2","2.44-3"]},{"source":"osv","ecosystem":"Debian:14","package":"glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.41-12","2.41-13~hurd.0","2.41-13~hurd.1","2.42-1","2.42-10","2.42-11","2.42-12","2.42-12~hurd.1","2.42-13","2.42-14","2.42-14~hurd.1","2.42-15","2.42-15~hurd.1","2.42-16","2.42-17","2.42-2","2.42-3","2.42-4","2.42-5","2.42-6","2.42-7","2.42-8","2.42-8~hurd.1","2.42-8~hurd.2","2.42-9","2.43-1","2.43-2","2.43-3","2.43-3+m68k","2.43-4","2.43-4+m68k","2.43-5","2.43-6","2.43-7","2.43-7~hurd.1","2.44-1","2.44-2","2.44-3"]},{"source":"osv","ecosystem":"Root:Debian:12","package":"glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.36-9+deb12u14.root.io.18"},{"fixed":"2.36-9+deb12u14.root.io.19"},{"fixed":"2.36-9+deb12u14.aikido.20"},{"fixed":"2.36-9+deb12u14.aikido.21"},{"fixed":"2.36-9+deb12u14.aikido.22"},{"fixed":"2.36-9+deb12u14.aikido.23"},{"fixed":"2.36-9+deb12u14.aikido.24"}]}]},{"source":"osv","ecosystem":"Root:Debian:12","package":"rootio-glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.36-9+deb12u14.root.io.18"},{"fixed":"2.36-9+deb12u14.root.io.19"},{"fixed":"2.36-9+deb12u14.aikido.20"},{"fixed":"2.36-9+deb12u14.aikido.21"},{"fixed":"2.36-9+deb12u14.aikido.22"},{"fixed":"2.36-9+deb12u14.aikido.23"},{"fixed":"2.36-9+deb12u14.aikido.24"}]}]},{"source":"osv","ecosystem":"Root:Debian:13","package":"glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.41-12+deb13u4.aikido.13"},{"fixed":"2.41-12+deb13u4.aikido.14"}]}]},{"source":"osv","ecosystem":"Root:Debian:13","package":"rootio-glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.41-12+deb13u4.aikido.13"},{"fixed":"2.41-12+deb13u4.aikido.14"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"eglibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.17-93ubuntu4","2.18-0ubuntu1","2.18-0ubuntu2","2.18-0ubuntu4","2.18-0ubuntu5","2.18-0ubuntu6","2.18-0ubuntu7","2.19-0ubuntu2","2.19-0ubuntu3","2.19-0ubuntu4","2.19-0ubuntu5","2.19-0ubuntu6","2.19-0ubuntu6.1","2.19-0ubuntu6.3","2.19-0ubuntu6.4","2.19-0ubuntu6.5","2.19-0ubuntu6.6","2.19-0ubuntu6.7","2.19-0ubuntu6.8","2.19-0ubuntu6.9","2.19-0ubuntu6.10","2.19-0ubuntu6.11","2.19-0ubuntu6.13","2.19-0ubuntu6.14","2.19-0ubuntu6.15","2.19-0ubuntu6.15+esm1","2.19-0ubuntu6.15+esm2","2.19-0ubuntu6.15+esm3","2.19-0ubuntu6.15+esm4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.21-0ubuntu4","2.21-0ubuntu5","2.21-0ubuntu6","2.23-0ubuntu1","2.23-0ubuntu2","2.23-0ubuntu3","2.23-0ubuntu4","2.23-0ubuntu5","2.23-0ubuntu6","2.23-0ubuntu7","2.23-0ubuntu9","2.23-0ubuntu10","2.23-0ubuntu11","2.23-0ubuntu11.2","2.23-0ubuntu11.3","2.23-0ubuntu11.3+esm1","2.23-0ubuntu11.3+esm2","2.23-0ubuntu11.3+esm3","2.23-0ubuntu11.3+esm5","2.23-0ubuntu11.3+esm6","2.23-0ubuntu11.3+esm7","2.23-0ubuntu11.3+esm8","2.23-0ubuntu11.3+esm9"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.26-0ubuntu2","2.26-0ubuntu2.1","2.27-0ubuntu2","2.27-0ubuntu3","2.27-3ubuntu1","2.27-3ubuntu1.2","2.27-3ubuntu1.3","2.27-3ubuntu1.4","2.27-3ubuntu1.5","2.27-3ubuntu1.6","2.27-3ubuntu1.6+esm1","2.27-3ubuntu1.6+esm2","2.27-3ubuntu1.6+esm3","2.27-3ubuntu1.6+esm4","2.27-3ubuntu1.6+esm5","2.27-3ubuntu1.6+esm6"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.30-0ubuntu2","2.30-0ubuntu3","2.31-0ubuntu5","2.31-0ubuntu6","2.31-0ubuntu7","2.31-0ubuntu9","2.31-0ubuntu9.1","2.31-0ubuntu9.2","2.31-0ubuntu9.3","2.31-0ubuntu9.7","2.31-0ubuntu9.9","2.31-0ubuntu9.12","2.31-0ubuntu9.14","2.31-0ubuntu9.15","2.31-0ubuntu9.16","2.31-0ubuntu9.17","2.31-0ubuntu9.18","2.31-0ubuntu9.18+esm1"]}],"products":[{"vendor":"gnu","product":"glibc"},{"vendor":"netapp","product":"cloud_backup"},{"vendor":"netapp","product":"ontap_select_deploy_administration_utility"},{"vendor":"netapp","product":"steelstore_cloud_integrated_storage"}],"references":[{"url":"https://security.netapp.com/advisory/ntap-20190315-0002/","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://lists.gnu.org/archive/html/bug-gnulib/2019-01/msg00108.html","tags":["x_refsource_MISC","x_transferred","Exploit","Mailing List","Vendor Advisory","evidence","report"]},{"url":"http://www.securityfocus.com/bid/107160","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34141","tags":["x_refsource_MISC","x_transferred","Exploit","Mailing List","Vendor Advisory","evidence"]},{"url":"https://support.f5.com/csp/article/K26346590?utm_source=f5support\u0026amp%3Butm_medium=RSS","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-20796"},{"url":"https://support.f5.com/csp/article/K26346590?utm_source=f5support\u0026amp;utm_medium=RSS"},{"url":"https://github.com/advisories/GHSA-7x29-5q3f-f4x2"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2018-20796","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-20796","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-20796","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-20796","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2018-20796","description":"In the GNU C Library (aka glibc or libc6) through 2.29, check_dst_limits_calc_pos_1 in posix/regexec.c has Uncontrolled Recursion, as demonstrated by '(\\227|)(\\\\1\\\\1|t1|\\\\\\2537)+' in grep.","status":"published","published":"2019-02-26T02:00:00Z","modified":"2024-08-05T12:12:28.627Z","updated_at":"2026-11-02T14:35:00.237825Z"}],"euvd":[{"id":"EUVD-2018-13339","description":"In the GNU C Library (aka glibc or libc6) through 2.29, check_dst_limits_calc_pos_1 in posix/regexec.c has Uncontrolled Recursion, as demonstrated by '(\\227|)(\\\\1\\\\1|t1|\\\\\\2537)+' in grep.","status":"published","published":"2019-02-26T02:00:00Z","modified":"2024-08-05T12:12:28Z","updated_at":"2026-11-03T02:39:29.769885Z"}],"ghsa":[{"id":"GHSA-7x29-5q3f-f4x2","title":"In the GNU C Library (aka glibc or libc6) through 2.29, check_dst_limits_calc_pos_1 in posix...","description":"In the GNU C Library (aka glibc or libc6) through 2.29, check_dst_limits_calc_pos_1 in posix/regexec.c has Uncontrolled Recursion, as demonstrated by '(\\227|)(\\\\1\\\\1|t1|\\\\\\2537)+' in grep.","status":"published","published":"2022-05-13T01:30:43Z","modified":"2023-02-01T05:08:01Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-674"],"updated_at":"2026-11-02T14:50:40.02829Z"}],"nvd":[{"id":"CVE-2018-20796","description":"In the GNU C Library (aka glibc or libc6) through 2.29, check_dst_limits_calc_pos_1 in posix/regexec.c has Uncontrolled Recursion, as demonstrated by '(\\227|)(\\\\1\\\\1|t1|\\\\\\2537)+' in grep.","status":"published","published":"2019-02-26T02:29:00.45Z","modified":"2026-06-17T01:53:29.553Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/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-674"],"updated_at":"2026-11-02T14:04:54.21788Z"}],"osv":[{"id":"BELL-CVE-2018-20796","title":"CVE-2018-20796 does not affect BellSoft software","status":"withdrawn","published":"2019-02-26T02:29:00Z","modified":"2026-01-26T09:49:48.633268Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:14.701973Z"},{"id":"CVE-2018-20796","description":"In the GNU C Library (aka glibc or libc6) through 2.29, check_dst_limits_calc_pos_1 in posix/regexec.c has Uncontrolled Recursion, as demonstrated by '(\\227|)(\\\\1\\\\1|t1|\\\\\\2537)+' in grep.","status":"published","published":"2019-02-26T02:29:00.45Z","modified":"2026-10-24T10:30:59.671195373Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:09.145458Z"},{"id":"DEBIAN-CVE-2018-20796","description":"In the GNU C Library (aka glibc or libc6) through 2.29, check_dst_limits_calc_pos_1 in posix/regexec.c has Uncontrolled Recursion, as demonstrated by '(\\227|)(\\\\1\\\\1|t1|\\\\\\2537)+' in grep.","status":"published","published":"2019-02-26T02:29:00.45Z","modified":"2026-10-23T18:03:21.172579573Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:30.867575Z"},{"id":"UBUNTU-CVE-2018-20796","description":"In the GNU C Library (aka glibc or libc6) through 2.29, check_dst_limits_calc_pos_1 in posix/regexec.c has Uncontrolled Recursion, as demonstrated by '(\\227|)(\\\\1\\\\1|t1|\\\\\\2537)+' in grep.","status":"published","published":"2019-02-26T02:29:00Z","modified":"2026-04-22T11:52:56.1303Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:17.91743Z"},{"id":"ROOT-OS-DEBIAN-12-CVE-2018-20796","title":"CVE-2018-20796 in glibc - Patched by Root","description":"Root has patched CVE-2018-20796 in the glibc package for Root:Debian:12. Multiple fixed versions available.","status":"published","published":"2026-11-04T10:23:01Z","modified":"2026-11-04T11:15:06.255252642Z","updated_at":"2026-11-04T11:38:21.953745Z"},{"id":"ROOT-OS-DEBIAN-13-CVE-2018-20796","title":"CVE-2018-20796 in glibc - Patched by Root","description":"Root has patched CVE-2018-20796 in the glibc package for Root:Debian:13. Multiple fixed versions available.","status":"published","published":"2026-11-03T12:58:38Z","modified":"2026-11-03T13:15:05.579000457Z","updated_at":"2026-11-03T13:33:04.521148Z"}]}}