01 Record
CVE-2023-4911
Glibc: buffer overflow in ld.so leading to privilege escalation
HighKEVPUBLISHEDCNA: redhat
CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
02 Description
Glibc: buffer overflow in ld.so leading to privilege escalation
03 Exploitation and scoring
- Exploitation
- Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2023-11-21. Federal remediation due 2023-12-12.
- SSVC decision
- ExploitationactiveCISA reports credible evidence of active exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 63.76% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 99.2% of scored records. A rank, not a probability.
- NVD base score
- 7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-10-14.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2023-10-03 17:25Z3 YR AGO
- Last updated
- 2026-10-14 21:45Z14 DAYS AGO
- Reserved
- 2023-09-12
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.8)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- Data version
- 5.2
- Document digest
- dba3be7684af8d16211a809f0b60d76efed6616dbfca8768ceb0b64129b3701c
05 Affected products
VendorProductVersionsPlatforms
06 References
- access.redhat.comRHSA-2023:5453https://access.redhat.com/errata/RHSA-2023:5453
- access.redhat.comRHSA-2023:5454https://access.redhat.com/errata/RHSA-2023:5454
- access.redhat.comRHSA-2023:5455https://access.redhat.com/errata/RHSA-2023:5455
- access.redhat.comRHSA-2023:5476https://access.redhat.com/errata/RHSA-2023:5476
- access.redhat.comRHSA-2024:0033https://access.redhat.com/errata/RHSA-2024:0033
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2023-4911
- bugzilla.redhat.comRHBZ#2238352https://bugzilla.redhat.com/show_bug.cgi?id=2238352
- www.qualys.comhttps://www.qualys.com/2023/10/03/cve-2023-4911/looney-tunables-local-privilege-escalation-glibc-ld-so.txt
- www.qualys.comhttps://www.qualys.com/cve-2023-4911/
- www.exploit-db.comhttps://www.exploit-db.com/exploits/52479
- packetstormsecurity.comhttp://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html
- packetstormsecurity.comhttp://packetstormsecurity.com/files/176288/Glibc-Tunables-Privilege-Escalation.html
- seclists.orghttp://seclists.org/fulldisclosure/2023/Oct/11
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/10/03/2
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/10/03/3
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/10/05/1
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/10/13/11
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/10/14/3
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/10/14/5
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/10/14/6
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4DBUQRRPB47TC3NJOUIBVWUGFHBJAFDL/
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DFG4P76UHHZEWQ26FWBXG76N2QLKKPZA/
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NDAQWHTSVOCOZ5K6KPIWKRT3JX4RTZUR/
- security.gentoo.orghttps://security.gentoo.org/glsa/202310-03
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20231013-0006/
- www.debian.orghttps://www.debian.org/security/2023/dsa-5514
- www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-4911
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-831302.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-794697.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html
07 Fixed in
AlmaLinux 8
- compat-libpthread-nonshared Fixed in 2.28-225.el8_8.6
- glibc Fixed in 2.28-225.el8_8.6
- glibc-all-langpacks Fixed in 2.28-225.el8_8.6
- glibc-benchtests Fixed in 2.28-225.el8_8.6
- glibc-common Fixed in 2.28-225.el8_8.6
- glibc-devel Fixed in 2.28-225.el8_8.6
- glibc-doc Fixed in 2.28-225.el8_8.6
- glibc-gconv-extra Fixed in 2.28-225.el8_8.6
- glibc-headers Fixed in 2.28-225.el8_8.6
- glibc-langpack-aa Fixed in 2.28-225.el8_8.6
- glibc-langpack-af Fixed in 2.28-225.el8_8.6
- glibc-langpack-agr Fixed in 2.28-225.el8_8.6
- glibc-langpack-ak Fixed in 2.28-225.el8_8.6
- glibc-langpack-am Fixed in 2.28-225.el8_8.6
- glibc-langpack-an Fixed in 2.28-225.el8_8.6
- glibc-langpack-anp Fixed in 2.28-225.el8_8.6
- glibc-langpack-ar Fixed in 2.28-225.el8_8.6
- glibc-langpack-as Fixed in 2.28-225.el8_8.6
- glibc-langpack-ast Fixed in 2.28-225.el8_8.6
- glibc-langpack-ayc Fixed in 2.28-225.el8_8.6
- glibc-langpack-az Fixed in 2.28-225.el8_8.6
- glibc-langpack-be Fixed in 2.28-225.el8_8.6
- glibc-langpack-bem Fixed in 2.28-225.el8_8.6
- glibc-langpack-ber Fixed in 2.28-225.el8_8.6
- glibc-langpack-bg Fixed in 2.28-225.el8_8.6
- glibc-langpack-bhb Fixed in 2.28-225.el8_8.6
- glibc-langpack-bho Fixed in 2.28-225.el8_8.6
- glibc-langpack-bi Fixed in 2.28-225.el8_8.6
- glibc-langpack-bn Fixed in 2.28-225.el8_8.6
- glibc-langpack-bo Fixed in 2.28-225.el8_8.6
- glibc-langpack-br Fixed in 2.28-225.el8_8.6
- glibc-langpack-brx Fixed in 2.28-225.el8_8.6
- glibc-langpack-bs Fixed in 2.28-225.el8_8.6
- glibc-langpack-byn Fixed in 2.28-225.el8_8.6
- glibc-langpack-ca Fixed in 2.28-225.el8_8.6
- glibc-langpack-ce Fixed in 2.28-225.el8_8.6
- glibc-langpack-chr Fixed in 2.28-225.el8_8.6
- glibc-langpack-cmn Fixed in 2.28-225.el8_8.6
- glibc-langpack-crh Fixed in 2.28-225.el8_8.6
- glibc-langpack-cs Fixed in 2.28-225.el8_8.6
174 further packages in AlmaLinux 8 not shown (first 40 listed).
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- glibc Fixed in 2.34-60.el9_2.7
- glibc-all-langpacks Fixed in 2.34-60.el9_2.7
- glibc-benchtests Fixed in 2.34-60.el9_2.7
- glibc-common Fixed in 2.34-60.el9_2.7
- glibc-devel Fixed in 2.34-60.el9_2.7
- glibc-doc Fixed in 2.34-60.el9_2.7
- glibc-gconv-extra Fixed in 2.34-60.el9_2.7
- glibc-headers Fixed in 2.34-60.el9_2.7
- glibc-langpack-aa Fixed in 2.34-60.el9_2.7
- glibc-langpack-af Fixed in 2.34-60.el9_2.7
- glibc-langpack-agr Fixed in 2.34-60.el9_2.7
- glibc-langpack-ak Fixed in 2.34-60.el9_2.7
- glibc-langpack-am Fixed in 2.34-60.el9_2.7
- glibc-langpack-an Fixed in 2.34-60.el9_2.7
- glibc-langpack-anp Fixed in 2.34-60.el9_2.7
- glibc-langpack-ar Fixed in 2.34-60.el9_2.7
- glibc-langpack-as Fixed in 2.34-60.el9_2.7
- glibc-langpack-ast Fixed in 2.34-60.el9_2.7
- glibc-langpack-ayc Fixed in 2.34-60.el9_2.7
- glibc-langpack-az Fixed in 2.34-60.el9_2.7
- glibc-langpack-be Fixed in 2.34-60.el9_2.7
- glibc-langpack-bem Fixed in 2.34-60.el9_2.7
- glibc-langpack-ber Fixed in 2.34-60.el9_2.7
- glibc-langpack-bg Fixed in 2.34-60.el9_2.7
- glibc-langpack-bhb Fixed in 2.34-60.el9_2.7
- glibc-langpack-bho Fixed in 2.34-60.el9_2.7
- glibc-langpack-bi Fixed in 2.34-60.el9_2.7
- glibc-langpack-bn Fixed in 2.34-60.el9_2.7
- glibc-langpack-bo Fixed in 2.34-60.el9_2.7
- glibc-langpack-br Fixed in 2.34-60.el9_2.7
- glibc-langpack-brx Fixed in 2.34-60.el9_2.7
- glibc-langpack-bs Fixed in 2.34-60.el9_2.7
- glibc-langpack-byn Fixed in 2.34-60.el9_2.7
- glibc-langpack-ca Fixed in 2.34-60.el9_2.7
- glibc-langpack-ce Fixed in 2.34-60.el9_2.7
- glibc-langpack-chr Fixed in 2.34-60.el9_2.7
- glibc-langpack-ckb Fixed in 2.34-60.el9_2.7
- glibc-langpack-cmn Fixed in 2.34-60.el9_2.7
- glibc-langpack-crh Fixed in 2.34-60.el9_2.7
- glibc-langpack-cs Fixed in 2.34-60.el9_2.7
175 further packages in AlmaLinux 9 not shown (first 40 listed).
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- compat-libpthread-nonshared Fixed in 2.28-225.el8_8.6
- glibc Fixed in 2.28-225.el8_8.6
- glibc-all-langpacks Fixed in 2.28-225.el8_8.6
- glibc-benchtests Fixed in 2.28-225.el8_8.6
- glibc-common Fixed in 2.28-225.el8_8.6
- glibc-devel Fixed in 2.28-225.el8_8.6
- glibc-doc Fixed in 2.28-225.el8_8.6
- glibc-gconv-extra Fixed in 2.28-225.el8_8.6
- glibc-headers Fixed in 2.28-225.el8_8.6
- glibc-langpack-aa Fixed in 2.28-225.el8_8.6
- glibc-langpack-af Fixed in 2.28-225.el8_8.6
- glibc-langpack-agr Fixed in 2.28-225.el8_8.6
- glibc-langpack-ak Fixed in 2.28-225.el8_8.6
- glibc-langpack-am Fixed in 2.28-225.el8_8.6
- glibc-langpack-an Fixed in 2.28-225.el8_8.6
- glibc-langpack-anp Fixed in 2.28-225.el8_8.6
- glibc-langpack-ar Fixed in 2.28-225.el8_8.6
- glibc-langpack-as Fixed in 2.28-225.el8_8.6
- glibc-langpack-ast Fixed in 2.28-225.el8_8.6
- glibc-langpack-ayc Fixed in 2.28-225.el8_8.6
- glibc-langpack-az Fixed in 2.28-225.el8_8.6
- glibc-langpack-be Fixed in 2.28-225.el8_8.6
- glibc-langpack-bem Fixed in 2.28-225.el8_8.6
- glibc-langpack-ber Fixed in 2.28-225.el8_8.6
- glibc-langpack-bg Fixed in 2.28-225.el8_8.6
- glibc-langpack-bhb Fixed in 2.28-225.el8_8.6
- glibc-langpack-bho Fixed in 2.28-225.el8_8.6
- glibc-langpack-bi Fixed in 2.28-225.el8_8.6
- glibc-langpack-bn Fixed in 2.28-225.el8_8.6
- glibc-langpack-bo Fixed in 2.28-225.el8_8.6
- glibc-langpack-br Fixed in 2.28-225.el8_8.6
- glibc-langpack-brx Fixed in 2.28-225.el8_8.6
- glibc-langpack-bs Fixed in 2.28-225.el8_8.6
- glibc-langpack-byn Fixed in 2.28-225.el8_8.6
- glibc-langpack-ca Fixed in 2.28-225.el8_8.6
- glibc-langpack-ce Fixed in 2.28-225.el8_8.6
- glibc-langpack-chr Fixed in 2.28-225.el8_8.6
- glibc-langpack-cmn Fixed in 2.28-225.el8_8.6
- glibc-langpack-crh Fixed in 2.28-225.el8_8.6
- glibc-langpack-cs Fixed in 2.28-225.el8_8.6
174 further packages in CloudLinux 8 not shown (first 40 listed).
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- glibc Fixed in 2.34-60.el9_2.7
- glibc-all-langpacks Fixed in 2.34-60.el9_2.7
- glibc-benchtests Fixed in 2.34-60.el9_2.7
- glibc-common Fixed in 2.34-60.el9_2.7
- glibc-devel Fixed in 2.34-60.el9_2.7
- glibc-doc Fixed in 2.34-60.el9_2.7
- glibc-gconv-extra Fixed in 2.34-60.el9_2.7
- glibc-headers Fixed in 2.34-60.el9_2.7
- glibc-langpack-aa Fixed in 2.34-60.el9_2.7
- glibc-langpack-af Fixed in 2.34-60.el9_2.7
- glibc-langpack-agr Fixed in 2.34-60.el9_2.7
- glibc-langpack-ak Fixed in 2.34-60.el9_2.7
- glibc-langpack-am Fixed in 2.34-60.el9_2.7
- glibc-langpack-an Fixed in 2.34-60.el9_2.7
- glibc-langpack-anp Fixed in 2.34-60.el9_2.7
- glibc-langpack-ar Fixed in 2.34-60.el9_2.7
- glibc-langpack-as Fixed in 2.34-60.el9_2.7
- glibc-langpack-ast Fixed in 2.34-60.el9_2.7
- glibc-langpack-ayc Fixed in 2.34-60.el9_2.7
- glibc-langpack-az Fixed in 2.34-60.el9_2.7
- glibc-langpack-be Fixed in 2.34-60.el9_2.7
- glibc-langpack-bem Fixed in 2.34-60.el9_2.7
- glibc-langpack-ber Fixed in 2.34-60.el9_2.7
- glibc-langpack-bg Fixed in 2.34-60.el9_2.7
- glibc-langpack-bhb Fixed in 2.34-60.el9_2.7
- glibc-langpack-bho Fixed in 2.34-60.el9_2.7
- glibc-langpack-bi Fixed in 2.34-60.el9_2.7
- glibc-langpack-bn Fixed in 2.34-60.el9_2.7
- glibc-langpack-bo Fixed in 2.34-60.el9_2.7
- glibc-langpack-br Fixed in 2.34-60.el9_2.7
- glibc-langpack-brx Fixed in 2.34-60.el9_2.7
- glibc-langpack-bs Fixed in 2.34-60.el9_2.7
- glibc-langpack-byn Fixed in 2.34-60.el9_2.7
- glibc-langpack-ca Fixed in 2.34-60.el9_2.7
- glibc-langpack-ce Fixed in 2.34-60.el9_2.7
- glibc-langpack-chr Fixed in 2.34-60.el9_2.7
- glibc-langpack-ckb Fixed in 2.34-60.el9_2.7
- glibc-langpack-cmn Fixed in 2.34-60.el9_2.7
- glibc-langpack-crh Fixed in 2.34-60.el9_2.7
- glibc-langpack-cs Fixed in 2.34-60.el9_2.7
175 further packages in CloudLinux 9 not shown (first 40 listed).
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- glibc Fixed in 2.36-9+deb12u3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- glibc Fixed in 2.37-12
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- glibc Fixed in 2.37-12
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- glibc Fixed in 2.35-0ubuntu3.4
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- glibc Fixed in 2.38-1ubuntu6
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.