{"id":"CVE-2023-4911","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.","modified":"2026-04-16T04:32:11.528235859Z","published":"2023-10-03T18:15:10.463Z","related":["ALSA-2023:5453","ALSA-2023:5455","CGA-93wj-5qf3-qrwp","openSUSE-SU-2024:13294-1"],"references":[{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-4911"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2023:5476"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/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://access.redhat.com/errata/RHSA-2023:5455"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0033"},{"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://www.qualys.com/cve-2023-4911/"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2238352"},{"type":"ARTICLE","url":"http://www.openwall.com/lists/oss-security/2023/10/13/11"},{"type":"ARTICLE","url":"http://www.openwall.com/lists/oss-security/2023/10/14/6"},{"type":"ARTICLE","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NDAQWHTSVOCOZ5K6KPIWKRT3JX4RTZUR/"},{"type":"ARTICLE","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4DBUQRRPB47TC3NJOUIBVWUGFHBJAFDL/"},{"type":"ARTICLE","url":"http://www.openwall.com/lists/oss-security/2023/10/14/3"},{"type":"ARTICLE","url":"http://www.openwall.com/lists/oss-security/2023/10/14/5"},{"type":"ARTICLE","url":"https://www.debian.org/security/2023/dsa-5514"},{"type":"ARTICLE","url":"http://www.openwall.com/lists/oss-security/2023/10/05/1"},{"type":"ARTICLE","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DFG4P76UHHZEWQ26FWBXG76N2QLKKPZA/"},{"type":"ARTICLE","url":"http://www.openwall.com/lists/oss-security/2023/10/03/3"},{"type":"EVIDENCE","url":"http://packetstormsecurity.com/files/176288/Glibc-Tunables-Privilege-Escalation.html"},{"type":"EVIDENCE","url":"http://seclists.org/fulldisclosure/2023/Oct/11"},{"type":"EVIDENCE","url":"https://www.exploit-db.com/exploits/52479"},{"type":"EVIDENCE","url":"http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html"},{"type":"EVIDENCE","url":"http://www.openwall.com/lists/oss-security/2023/10/03/2"},{"type":"EVIDENCE","url":"https://www.qualys.com/2023/10/03/cve-2023-4911/looney-tunables-local-privilege-escalation-glibc-ld-so.txt"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/bminor/glibc","events":[{"introduced":"ae37d06c7d127817ba43850f0f898b793d42aea7"},{"fixed":"ef321e23c20eebc6d6fb4044425c00e6df27b05f"}],"database_specific":{"versions":[{"introduced":"2.34"},{"fixed":"2.39"}]}}],"versions":["glibc-2.34","glibc-2.34.9000","glibc-2.35","glibc-2.35.9000","glibc-2.36","glibc-2.36.9000","glibc-2.37","glibc-2.37.9000","glibc-2.38","glibc-2.38.9000"],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"37"}]},{"events":[{"introduced":"0"},{"last_affected":"38"}]},{"events":[{"introduced":"0"},{"last_affected":"39"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"8.6"}]},{"events":[{"introduced":"0"},{"last_affected":"9.2"}]},{"events":[{"introduced":"0"},{"last_affected":"9.4"}]},{"events":[{"introduced":"0"},{"last_affected":"9.6"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0_aarch64"}]},{"events":[{"introduced":"0"},{"last_affected":"8.6"}]},{"events":[{"introduced":"0"},{"last_affected":"9.2_aarch64"}]},{"events":[{"introduced":"0"},{"last_affected":"9.4_aarch64"}]},{"events":[{"introduced":"0"},{"last_affected":"9.6_aarch64"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0_s390x"}]},{"events":[{"introduced":"0"},{"last_affected":"8.6"}]},{"events":[{"introduced":"0"},{"last_affected":"9.2_s390x"}]},{"events":[{"introduced":"0"},{"last_affected":"9.4_s390x"}]},{"events":[{"introduced":"0"},{"last_affected":"9.6_s390x"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0_ppc64le"}]},{"events":[{"introduced":"0"},{"last_affected":"8.6"}]},{"events":[{"introduced":"0"},{"last_affected":"9.2_ppc64le"}]},{"events":[{"introduced":"0"},{"last_affected":"9.4_ppc64le"}]},{"events":[{"introduced":"0"},{"last_affected":"9.6_ppc64le"}]},{"events":[{"introduced":"0"},{"last_affected":"4.0"}]},{"events":[{"introduced":"0"},{"last_affected":"4.0"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"8.6"}]},{"events":[{"introduced":"0"},{"last_affected":"9.2"}]},{"events":[{"introduced":"0"},{"last_affected":"9.4"}]},{"events":[{"introduced":"0"},{"last_affected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