CVE-2023-4911

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.

• CWE-122
• CWE-787

• https://access.redhat.com/errata/RHSA-2023:5453Third Party Advisory
• https://access.redhat.com/errata/RHSA-2023:5454Third Party Advisory
• https://access.redhat.com/errata/RHSA-2023:5455Third Party Advisory
• https://access.redhat.com/errata/RHSA-2023:5476Third Party Advisory
• https://access.redhat.com/errata/RHSA-2024:0033Third Party Advisory
• https://access.redhat.com/security/cve/CVE-2023-4911Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2238352Issue Tracking, Patch
• https://www.qualys.com/2023/10/03/cve-2023-4911/looney-tunables-local-privilege-escalation-glibc-ld-so.txtExploit, Third Party Advisory
• https://www.qualys.com/cve-2023-4911/Third Party Advisory
• http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
• http://packetstormsecurity.com/files/176288/Glibc-Tunables-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
• http://seclists.org/fulldisclosure/2023/Oct/11Exploit, Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2023/10/03/2Exploit, Mailing List
• http://www.openwall.com/lists/oss-security/2023/10/03/3Mailing List
• http://www.openwall.com/lists/oss-security/2023/10/05/1Mailing List
• http://www.openwall.com/lists/oss-security/2023/10/13/11Mailing List
• http://www.openwall.com/lists/oss-security/2023/10/14/3Mailing List
• http://www.openwall.com/lists/oss-security/2023/10/14/5Mailing List
• http://www.openwall.com/lists/oss-security/2023/10/14/6Mailing List
• https://access.redhat.com/errata/RHSA-2023:5453Third Party Advisory
• https://access.redhat.com/errata/RHSA-2023:5454Third Party Advisory
• https://access.redhat.com/errata/RHSA-2023:5455Third Party Advisory
• https://access.redhat.com/errata/RHSA-2023:5476Third Party Advisory
• https://access.redhat.com/errata/RHSA-2024:0033Third Party Advisory
• https://access.redhat.com/security/cve/CVE-2023-4911Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2238352Issue Tracking, Patch
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4DBUQRRPB47TC3NJOUIBVWUGFHBJAFDL/Mailing List
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DFG4P76UHHZEWQ26FWBXG76N2QLKKPZA/Mailing List
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NDAQWHTSVOCOZ5K6KPIWKRT3JX4RTZUR/Mailing List
• https://security.gentoo.org/glsa/202310-03Third Party Advisory
• https://security.netapp.com/advisory/ntap-20231013-0006/Third Party Advisory
• https://www.debian.org/security/2023/dsa-5514Mailing List
• https://www.exploit-db.com/exploits/52479Exploit, Third Party Advisory, VDB Entry
• https://www.qualys.com/2023/10/03/cve-2023-4911/looney-tunables-local-privilege-escalation-glibc-ld-so.txtExploit, Third Party Advisory
• https://www.qualys.com/cve-2023-4911/Third Party Advisory
• https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlThird Party Advisory
• https://cert-portal.siemens.com/productcert/html/ssa-794697.htmlThird Party Advisory
• https://cert-portal.siemens.com/productcert/html/ssa-831302.htmlThird Party Advisory
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-4911US Government Resource

Published

Oct 3, 2023

Last Modified

Jun 17, 2026

Status

Analyzed