{"id":"CVE-2017-17426","aliases":["BELL-CVE-2017-17426","EUVD-2017-8591","GHSA-5rxv-m65f-6q4g","UBUNTU-CVE-2017-17426","USN-3534-1","openSUSE-SU-2024:10792-1"],"status":"published","title":"The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block...","description":"The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.","severity":{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01597,"percentile":0.75919,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-190"],"published":"2017-12-05T00:00:00Z","modified":"2026-10-24T10:30:34Z","affected":[{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"eglibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.19-0ubuntu6.14"}]}],"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"],"bundled":7},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.23-0ubuntu10"}]}],"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"],"bundled":7},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"glibc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.34-1.2"}]}],"bundled":34}],"products":[{"vendor":"gnu","product":"glibc"}],"references":[{"url":"https://sourceware.org/bugzilla/show_bug.cgi?id=22375","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Issue Tracking","report"]},{"url":"https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=34697694e8a93b325b18f25f7dcded55d6baeaf6","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-17426"},{"url":"https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=34697694e8a93b325b18f25f7dcded55d6baeaf6","tags":["report"]},{"url":"https://github.com/advisories/GHSA-5rxv-m65f-6q4g"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2017-17426","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2017-17426","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-3534-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-17426","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-15670","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-15804","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-16997","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-1000408","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-1000409","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2018-1000001","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2009-5064","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2009-5155","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2010-3192","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-5180","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-10228","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-10739","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-6261","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-6323","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-1000366","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-1000408","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-12132","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-12133","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-15670","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-16997","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-17426","tags":["web"]},{"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-2019-25013","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-2020-27618","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-29562","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-29573","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-2021-3326","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-33574","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2017-17426","description":"The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.","status":"published","published":"2017-12-05T17:00:00Z","modified":"2024-09-16T16:32:49.604Z","updated_at":"2026-11-02T14:33:18.248329Z"}],"euvd":[{"id":"EUVD-2017-8591","description":"The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.","status":"published","published":"2017-12-05T17:00:00Z","modified":"2024-09-16T16:32:49Z","updated_at":"2026-11-03T00:55:50.59293Z"}],"ghsa":[{"id":"GHSA-5rxv-m65f-6q4g","title":"The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block...","description":"The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.","status":"published","published":"2022-05-17T00:14:45Z","modified":"2025-04-20T03:49:28Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T15:01:55.641204Z"}],"nvd":[{"id":"CVE-2017-17426","description":"The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.","status":"published","published":"2017-12-05T17:29:00.94Z","modified":"2026-06-17T01:10:46.873Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:04:09.7374Z"}],"osv":[{"id":"BELL-CVE-2017-17426","title":"CVE-2017-17426 does not affect BellSoft software","status":"withdrawn","published":"2017-12-05T17:29:00Z","modified":"2026-01-26T09:45:51.94403Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:14.137943Z"},{"id":"CVE-2017-17426","description":"The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.","status":"published","published":"2017-12-05T17:29:00.94Z","modified":"2026-10-24T10:30:34.881992216Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:04.853379Z"},{"id":"UBUNTU-CVE-2017-17426","description":"The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.","status":"withdrawn","published":"2017-12-05T00:00:00Z","modified":"2026-02-04T02:33:37.075621Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:14.563448Z"},{"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":"USN-3534-1","title":"eglibc, glibc vulnerabilities","description":"It was discovered that the GNU C library did not properly handle all of\nthe possible return values from the kernel getcwd(2) syscall. A local\nattacker could potentially exploit this to execute arbitrary code in setuid\nprograms and gain administrative privileges. (CVE-2018-1000001)\n\nA memory leak was discovered in the _dl_init_paths() function in the GNU\nC library dynamic loader. A local attacker could potentially exploit this\nwith a specially crafted value in the LD_HWCAP_MASK environment variable,\nin combination with CVE-2017-1000409 and another vulnerability on a system\nwith hardlink protections disabled, in order to gain administrative\nprivileges. (CVE-2017-1000408)\n\nA heap-based buffer overflow was discovered in the _dl_init_paths()\nfunction in the GNU C library dynamic loader. A local attacker could\npotentially exploit this with a specially crafted value in the\nLD_LIBRARY_PATH environment variable, in combination with CVE-2017-1000408\nand another vulnerability on a system with hardlink protections disabled,\nin order to gain administrative privileges. (CVE-2017-1000409)\n\nAn off-by-one error leading to a heap-based buffer overflow was discovered\nin the GNU C library glob() implementation. An attacker could potentially\nexploit this to cause a denial of service or execute arbitrary code via a\nmaliciously crafted pattern. (CVE-2017-15670)\n\nA heap-based buffer overflow was discovered during unescaping of user names\nwith the ~ operator in the GNU C library glob() implementation. An attacker\ncould potentially exploit this to cause a denial of service or execute\narbitrary code via a maliciously crafted pattern. (CVE-2017-15804)\n\nIt was discovered that the GNU C library dynamic loader mishandles RPATH\nand RUNPATH containing $ORIGIN for privileged (setuid or AT_SECURE)\nprograms. A local attacker could potentially exploit this by providing a\nspecially crafted library in the current working directory in order to\ngain administrative privileges. (CVE-2017-16997)\n\nIt was discovered that the GNU C library malloc() implementation could\nreturn a memory block that is too small if an attempt is made to allocate\nan object whose size is close to SIZE_MAX, resulting in a heap-based\noverflow. An attacker could potentially exploit this to cause a denial of\nservice or execute arbitrary code. This issue only affected Ubuntu 17.10.\n(CVE-2017-17426)\n","status":"published","published":"2018-01-17T12:57:11Z","modified":"2026-04-22T09:42:09.265621Z","updated_at":"2026-11-02T16:58:13.496563Z"}]}}