Description
The iconv() function in the GNU C Library versions 2.39 and older may overflow the output buffer passed to it by up to 4 bytes when converting strings to the ISO-2022-CN-EXT character set, which may be used to crash an application or overwrite a neighbouring variable.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The GNU C Library | glibc | 2.1.93 – < 2.40 | 2.40 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | glibc | 2.37-18 | — |
| Debian 13 | glibc | 2.37-18 | — |
| Debian 12 | glibc | 2.36-9+deb12u6 | DSA-5673-1 |
| Debian 11 | glibc | 2.31-13+deb11u9 | DSA-5673-1 |
| Debian 10 | glibc | 2.28-10+deb10u3 | DLA-3807-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | glibc | 2.39-0ubuntu8.1 | USN-6737-2 |
| Ubuntu 22.04 LTS | glibc | 2.35-0ubuntu3.7 | USN-6737-1 |
| Ubuntu 20.04 LTS | glibc | 2.31-0ubuntu9.15 | USN-6737-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | glibc | 2.27-3ubuntu1.6+esm2 | USN-6762-1 |
| Ubuntu Pro 16.04 LTS | glibc | 2.23-0ubuntu11.3+esm6 | USN-6762-1 |
| Ubuntu Pro 14.04 LTS | eglibc | 2.19-0ubuntu6.15+esm3 | USN-6762-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | nscd +214 | 2.34-100.el9_4.2 | RHSA-2024:3339 |
| RHEL 8 | nscd +213 | 2.28-236.el8_9.13 | RHSA-2024:3269, RHSA-2024:2722 |
| RHEL 7 | nscd +7 | 2.17-326.el7_9.3 | RHSA-2024:3588 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Hypervisor 4 | glibc-devel +1 | 2.28-189.10.el8_6 | RHSA-2024:2799 |
| RHEL 9.2 EUS | nscd +214 | 2.34-60.el9_2.14 | RHSA-2024:3411 |
| RHEL 9.0 EUS | nscd +214 | 2.34-28.el9_0.6 | RHSA-2024:3423 |
| RHEL 8.8 EUS | nscd +213 | 2.28-225.el8_8.11 | RHSA-2024:3312 |
| RHEL 8.6 EUS | nscd +213 | 2.28-189.10.el8_6 | RHSA-2024:2799 |
| RHEL 8.4 TUS | glibc-utils +2 | 2.28-151.el8_4.2 | RHSA-2024:3309 |
| RHEL 8.4 E4S | glibc +180 | 2.28-151.el8_4.2 | RHSA-2024:3309 |
| RHEL 8.4 AUS | nscd +208 | 2.28-151.el8_4.2 | RHSA-2024:3309 |
| RHEL 8.2 AUS | nscd +208 | 2.28-101.el8_2.2 | RHSA-2024:3464 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | nscd +214 | 2.34-100.el9_4.2 | ALSA-2024:3339 |
| AlmaLinux 8 | nscd +213 | 2.28-236.el8_9.13 | ALSA-2024:3269, ALSA-2024:2722 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | glibc | 2.34-100.el9_4.2 | RLSA-2024:3339 |
| Rocky Linux 8 | glibc | 2.28-236.el8_9.13 | RLSA-2024:3269, RLSA-2024:2722 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| SLES 15 SP4 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| SLES 15 SP3 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| SLES 15 SP2 | glibc | 2.26-150000.13.73.1 | SUSE-SU-2024:1977-1 |
| SLES 12 SP5 | glibc | 2.22-114.34.1 | SUSE-SU-2024:1675-1 |
Show 20 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | glibc | 2.11.3-17.110.52.1 | SUSE-SU-2024:1728-1 |
| SLES for SAP 15 SP4 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| SLES for SAP 15 SP3 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| SLES for SAP 15 SP2 | glibc | 2.26-150000.13.73.1 | SUSE-SU-2024:1977-1 |
| SLES for SAP 12 SP5 | glibc | 2.22-114.34.1 | SUSE-SU-2024:1675-1 |
| SLE Micro 6.0 | glibc | 2.38-7.1 | SUSE-SU-2025:20038-1 |
| SLE Micro 5.5 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| SLE Micro 5.4 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| SLE Micro 5.3 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| SLE Micro 5.2 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| SLE Micro 5.1 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| SLE Live Patching 15 SP5 | glibc-livepatches | 0.1-150400.3.3.1 | SUSE-SU-2024:1805-1 |
| SLE Live Patching 15 SP4 | glibc-livepatches | 0.1-150400.3.3.1 | SUSE-SU-2024:1805-1 |
| SLE HPC 15 SP4 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| SLE HPC 15 SP3 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| SLE HPC 15 SP2 | glibc | 2.26-150000.13.73.1 | SUSE-SU-2024:1977-1 |
| SUSE Package Hub 15 SP6 | phpMyAdmin | 5.2.2-bp156.4.3.1 | openSUSE-SU-2025:0081-1 |
| SUSE Manager Server 4.3 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| SUSE Manager Proxy 4.3 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| SUSE Enterprise Storage 7.1 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glibc | 2.39-5.1 | openSUSE-SU-2024:13877-1 |
| openSUSE Tumbleweed | phpMyAdmin | 5.2.2-1.1 | openSUSE-SU-2025:14688-1 |
| openSUSE Leap 15.6 | phpMyAdmin | 5.2.2-bp156.4.3.1 | openSUSE-SU-2025:0081-1 |
| openSUSE Leap 15.5 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.4 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
| openSUSE Leap Micro 5.3 | glibc | 2.31-150300.74.1 | SUSE-SU-2024:1375-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | nscd +217 | 2.34-52.amzn2023.0.10 | ALAS2023-2024-589 |
| Amazon Linux 2 | nscd +199 | 2.26-64.amzn2.0.1 | ALAS2-2024-2521 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | nscd +214 | 2.34-100.0.1.el9_4.2 | ELSA-2024-3339 |
| Oracle Linux 8 | nscd +213 | 2.28-236.0.1.el8_9.13 | ELSA-2024-3269, ELSA-2024-2722 |
| Oracle Linux 7 | nscd +6 | 2.17-326.0.9.el7_9.3 | ELSA-2024-3588 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | glibc | 2.39-r2 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 1 module
-
CosmicSting: Magento Arbitrary File Read (CVE-2024-34102) + PHP Buffer Overflow in the iconv() function of glibc (CVE-2024-2961)
exploit/linux/http/magento_xxe_to_glibc_buf_overflow
GitHub 17 repositories · most starred shown
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ambionics/cnext-exploits ★ 504 · May 27, 2024
Exploits for CNEXT (CVE-2024-2961), a buffer overflow in the glibc's iconv()
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kyotozx/CVE-2024-2961-Remote-File-Read ★ 5 · Jan 27, 2025
This script demonstrates a proof-of-concept (PoC) for exploiting a file read vulnerability in the iconv library, as detailed in Ambionics Security's blog https://www.ambionics.io/blog/iconv-cve-2024-…
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rvzsec/CVE-2024-2961 ★ 5 · May 20, 2024
CVE-2024–2961 Security Issue Mitigation Script
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suce0155/CVE-2024-2961 ★ 4 · Feb 4, 2025
CVE-2024-2961 Cnext RCE Exploit with Buddyforms 2.7.7
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kjdfklha/CVE-2024-2961_poc ★ 2 · Jun 4, 2024
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mattaperkins/FIX-CVE-2024-2961 ★ 2 · Apr 24, 2024
Quick mitigation script
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omarelshopky/exploit_cve-2023-26326_using_cve-2024-2961 ★ 1 · Feb 2, 2025
Exploit for CVE-2023-26326 in the WordPress BuddyForms plugin, leveraging CVE-2024-2961 for remote code execution. This exploit bypasses PHP 8+ deserialization limitations by chaining vulnerabilities…
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tnishiox/cve-2024-2961 ★ 0 · Jun 4, 2024
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exfil0/test_iconv ★ 0 · Jun 3, 2024
This repository contains a C program to test for CVE-2024-2961, a buffer overflow vulnerability in the iconv() function of glibc.
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absolutedesignltd/iconvfix ★ 0 · May 30, 2024
Bash script to patch for CVE-2024-2961
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 49
- ALSA-2024:3339 Important: glibc security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:3269 Important: glibc security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:2722 Important: glibc security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:3588 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:3464 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:3423 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:3411 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:3339 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:3312 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:3309 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:3269 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:2799 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2024:2722 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- SSA-082556 SSA-082556: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.5 Siemens ProductCERT · Oct 13, 2026
- WID-SEC-2025-0001 IBM DB2: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 11, 2026
- WID-SEC-2024-0926 GNU libc: Schwachstelle ermöglicht Codeausführung BSI CERT-Bund (WID) · Sep 15, 2026
- USN-6762-1 eglibc, glibc vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- ICSA-25-162-05 Siemens SIMATIC S7-1500 CPU family CISA ICS & IT advisories · May 14, 2026
- WID-SEC-2024-1226 Red Hat OpenShift: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 11, 2026
- USN-6737-2 glibc vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-6737-1 glibc vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- SUSE-SU-2025:20038-1 Security update for glibc SUSE / openSUSE Security Updates · Mar 23, 2026
- DSA-5673-1 glibc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3807-1 glibc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2024:3339 Important: glibc security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:3269 Important: glibc security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2024:2722 Important: glibc security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2024:1728-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1805-1 Security update for glibc-livepatches SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2025:14688-1 phpMyAdmin-5.2.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1977-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1675-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13877-1 glibc-2.39-5.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2025:0081-1 Security update for phpMyAdmin SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1375-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-0225 Dell PowerProtect Data Domain: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 1, 2025
- WID-SEC-2025-0794 Juniper Junos Space: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 4, 2025
- NCSC-2025-0187 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Jun 10, 2025
- WID-SEC-2024-1307 Red Hat OpenShift Service Mesh Containers: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 5, 2025
- NCSC-2025-0021 Kwetsbaarheden verholpen in Oracle Communications NCSC-NL (Netherlands) · Jan 22, 2025
- NCSC-2025-0020 Kwetsbaarheden verholpen in Oracle Database producten NCSC-NL (Netherlands) · Jan 22, 2025
- WID-SEC-2024-1642 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 20, 2024
- NCSC-2024-0294 Kwetsbaarheden verholpen in Oracle Communications NCSC-NL (Netherlands) · Jul 17, 2024
- ELSA-2024-3588 Important: glibc security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 5, 2024
- ELSA-2024-3339 Important: glibc security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 29, 2024
- ELSA-2024-3269 Important: glibc security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 29, 2024
- ELSA-2024-2722 Important: glibc security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 8, 2024
- ALAS2023-2024-589 Important: glibc security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Apr 25, 2024
- ALAS2-2024-2521 Important: glibc security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 24, 2024
References
- https://sourceware.org/git/?p=glibc.git;a=blob;f=advisories/GLIBC-SA-2024-0004
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P3I4KYS6EU6S7QZ47WFNTPVAHFIUQNEL/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YAMJQI3Y6BHWV3CUTYBXOZONCUJNOB2Z/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BTJFBGHDYG5PEIFD5WSSSKSFZ2AZWC5N/
- http://www.openwall.com/lists/oss-security/2024/04/24/2
- http://www.openwall.com/lists/oss-security/2024/04/17/9
- http://www.openwall.com/lists/oss-security/2024/04/18/4
- https://lists.debian.org/debian-lts-announce/2024/05/msg00001.html
- http://www.openwall.com/lists/oss-security/2024/05/27/2
- http://www.openwall.com/lists/oss-security/2024/05/27/6
- http://www.openwall.com/lists/oss-security/2024/05/27/1
- http://www.openwall.com/lists/oss-security/2024/05/27/4
- http://www.openwall.com/lists/oss-security/2024/05/27/5
- http://www.openwall.com/lists/oss-security/2024/05/27/3
- https://security.netapp.com/advisory/ntap-20240531-0002/
- http://www.openwall.com/lists/oss-security/2024/07/22/5