{"id":"CVE-2023-4911","aliases":[],"url":"https://o3.security/vulnerability/CVE-2023-4911","summary":"Glibc: buffer overflow in ld.so leading to privilege escalation","details":"A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges.","published":"2023-10-03T17:25:08.434Z","modified":"2026-08-28T11:45:58.276800269Z","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.81422,"percentile":0.99613,"asOf":"2026-09-08"},"cisaKev":null,"exploitsKnown":29,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html"},{"type":"WEB","url":"http://packetstormsecurity.com/files/176288/Glibc-Tunables-Privilege-Escalation.html"},{"type":"WEB","url":"http://seclists.org/fulldisclosure/2023/Oct/11"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2023/10/03/2"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2023/10/03/3"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2023/10/05/1"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2023/10/13/11"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2023/10/14/3"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2023/10/14/5"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2023/10/14/6"},{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://cert-portal.siemens.com/productcert/html/ssa-082556.html"},{"type":"WEB","url":"https://cert-portal.siemens.com/productcert/html/ssa-794697.html"},{"type":"WEB","url":"https://cert-portal.siemens.com/productcert/html/ssa-831302.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4DBUQRRPB47TC3NJOUIBVWUGFHBJAFDL/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DFG4P76UHHZEWQ26FWBXG76N2QLKKPZA/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NDAQWHTSVOCOZ5K6KPIWKRT3JX4RTZUR/"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-4911"},{"type":"WEB","url":"https://www.exploit-db.com/exploits/52479"},{"type":"WEB","url":"https://www.qualys.com/2023/10/03/cve-2023-4911/looney-tunables-local-privilege-escalation-glibc-ld-so.txt"},{"type":"WEB","url":"https://www.qualys.com/cve-2023-4911/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2023:5453"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2023:5454"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2023:5455"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2023:5476"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0033"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2023-4911"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4911.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-4911"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202310-03"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20231013-0006/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2023/dsa-5514"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2238352"},{"type":"PACKAGE","url":"https://sourceware.org/git/glibc.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-28T11:45:58.276800269Z"}}