Description
libcurl would reuse a previously created connection even when a TLS or SSHrelated option had been changed that should have prohibited reuse.libcurl keeps previously used connections in a connection pool for subsequenttransfers to reuse if one of them matches the setup. However, several TLS andSSH settings were left out from the configuration match checks, making themmatch too easily.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | https://github.com/curl/curl | Fixed in 7.83.1 | — |
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 | curl | 7.83.1-1 | — |
| Debian 13 | curl | 7.83.1-1 | — |
| Debian 12 | curl | 7.83.1-1 | — |
| Debian 11 | curl | 7.74.0-1.3+deb11u2 | DSA-5197-1 |
| Debian 10 | curl | 7.64.0-4+deb10u3 | DLA-3085-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | curl | 7.81.0-1ubuntu1.2 | USN-5412-1 |
| Ubuntu 20.04 LTS | curl | 7.68.0-1ubuntu2.11 | USN-5412-1 |
| Ubuntu 18.04 LTS | curl | 7.58.0-2ubuntu3.18 | USN-5412-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | curl | No fix yet | — |
| Ubuntu Pro 14.04 LTS | curl | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | curl +4 | 7.76.1-14.el9_0.4 | RHSA-2022:5245 |
| RHEL 8 | curl +3 | 7.61.1-22.el8_6.3 | RHSA-2022:5313 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | curl +3 | 7.61.1-22.el8_6.3 | ALSA-2022:5313 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | curl | 7.61.1-22.el8_6.3 | RLSA-2022:5313 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | curl | 7.66.0-150200.4.33.1 | SUSE-SU-2022:1870-1 |
| SLES 15 SP2 | curl | 7.66.0-150200.4.33.1 | SUSE-SU-2022:1870-1 |
| SLES 15 SP1 | curl | 7.60.0-150000.33.1 | SUSE-SU-2022:2829-1 |
| SLES 15 | curl | 7.60.0-150000.33.1 | SUSE-SU-2022:2829-1 |
| SLES 12 SP5 | curl | 7.60.0-11.40.2 | SUSE-SU-2022:1805-1 |
Show 24 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | curl | 7.60.0-4.38.1 | SUSE-SU-2022:2813-1 |
| SLES 12 SP3 | curl | 7.37.0-37.76.1 | SUSE-SU-2022:1733-1 |
| SLES 12 SP2 | curl | 7.37.0-37.76.1 | SUSE-SU-2022:1733-1 |
| SLES for SAP 15 SP2 | curl | 7.66.0-150200.4.33.1 | SUSE-SU-2022:1870-1 |
| SLES for SAP 15 SP1 | curl | 7.60.0-150000.33.1 | SUSE-SU-2022:2829-1 |
| SLES for SAP 15 | curl | 7.60.0-150000.33.1 | SUSE-SU-2022:2829-1 |
| SLES for SAP 12 SP5 | curl | 7.60.0-11.40.2 | SUSE-SU-2022:1805-1 |
| SLES for SAP 12 SP4 | curl | 7.60.0-4.38.1 | SUSE-SU-2022:2813-1 |
| SLES for SAP 12 SP3 | curl | 7.37.0-37.76.1 | SUSE-SU-2022:1733-1 |
| SLE Micro 5.2 | curl | 7.66.0-150200.4.33.1 | SUSE-SU-2022:1870-1 |
| SLE Micro 5.1 | curl | 7.66.0-150200.4.33.1 | SUSE-SU-2022:1870-1 |
| SLE HPC 15 SP2 | curl | 7.66.0-150200.4.33.1 | SUSE-SU-2022:1870-1 |
| SLE HPC 15 SP1 | curl | 7.60.0-150000.33.1 | SUSE-SU-2022:2829-1 |
| SLE HPC 15 | curl | 7.60.0-150000.33.1 | SUSE-SU-2022:2829-1 |
| SUSE OpenStack Cloud Crowbar 9 | curl | 7.60.0-4.38.1 | SUSE-SU-2022:2813-1 |
| SUSE OpenStack Cloud Crowbar 8 | curl | 7.37.0-37.76.1 | SUSE-SU-2022:1733-1 |
| SUSE OpenStack Cloud 9 | curl | 7.60.0-4.38.1 | SUSE-SU-2022:2813-1 |
| SUSE OpenStack Cloud 8 | curl | 7.37.0-37.76.1 | SUSE-SU-2022:1733-1 |
| SUSE Manager Server 4.1 | curl | 7.66.0-150200.4.33.1 | SUSE-SU-2022:1870-1 |
| SUSE Manager Retail Branch Server 4.1 | curl | 7.66.0-150200.4.33.1 | SUSE-SU-2022:1870-1 |
| SUSE Manager Proxy 4.1 | curl | 7.66.0-150200.4.33.1 | SUSE-SU-2022:1870-1 |
| SUSE HPE Helion OpenStack 8 | curl | 7.37.0-37.76.1 | SUSE-SU-2022:1733-1 |
| SUSE Enterprise Storage 7 | curl | 7.66.0-150200.4.33.1 | SUSE-SU-2022:1870-1 |
| SUSE Enterprise Storage 6 | curl | 7.60.0-150000.33.1 | SUSE-SU-2022:2829-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | curl | 7.83.1-1.1 | openSUSE-SU-2024:12062-1 |
| openSUSE Leap 15.3 | curl | 7.66.0-150200.4.33.1 | SUSE-SU-2022:1870-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | curl | 7.83.1-r0 | — |
| Alpine v3.23 | curl | 7.83.1-r0 | — |
| Alpine v3.22 | curl | 7.83.1-r0 | — |
| Alpine v3.21 | curl | 7.83.1-r0 | — |
| Alpine v3.20 | curl | 7.83.1-r0 | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | curl | 7.83.1-r0 | — |
| Alpine v3.18 | curl | 7.83.1-r0 | — |
| Alpine v3.17 | curl | 7.83.1-r0 | — |
| Alpine v3.16 | curl | 7.83.1-r0 | — |
| Alpine v3.15 | curl | 7.80.0-r2 | — |
| Alpine v3.14 | curl | 7.79.1-r2 | — |
| Alpine v3.13 | curl | 7.79.1-r2 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | curl +4 | 7.87.0-2.amzn2023.0.2 | ALAS2023-2023-083 |
| Amazon Linux 2 | curl +2 | 7.79.1-4.amzn2.0.1 | ALAS2-2022-1808 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | curl | 7.83.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | curl +4 | 7.76.1-14.el9_0.4 | ELSA-2022-5245 |
| Oracle Linux 8 | curl +3 | 7.61.1-22.el8_6.3 | ELSA-2022-5313 |
Advisories 33
- ALSA-2022:5313 Moderate: curl security update AlmaLinux Security Advisories · Oct 29, 2026
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- WID-SEC-2024-0794 Dell ECS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2026
- WID-SEC-2023-1350 Splunk Splunk Enterprise: Mehrere Schwachstellen in Komponenten von Drittanbietern BSI CERT-Bund (WID) · Jul 1, 2026
- RHSA-2022:5313 Red Hat Security Advisory: curl security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2022:5245 Red Hat Security Advisory: curl security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- USN-5412-1 curl vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5197-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3085-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2022:5313 Moderate: curl security update Rocky Linux Security Advisories · Feb 5, 2026
- openSUSE-SU-2024:12062-1 curl-7.83.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1805-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2813-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:2829-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1870-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2026-0180 Dell Data Protection Advisor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 20, 2026
- WID-SEC-2023-2229 Splunk Splunk Enterprise: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 18, 2025
- WID-SEC-2022-0277 cURL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 6, 2025
- WID-SEC-2024-3377 Dell PowerProtect Data Domain: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 12, 2025
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- VDE-2022-046 PHOENIX CONTACT: Multiple Linux component vulnerabilities in PLCnext Firmware CERT@VDE · May 22, 2025
- ICSA-23-194-01 Siemens RUGGEDCOM ROX CISA ICS & IT advisories · May 6, 2025
- SUSE-SU-2022:1733-1 Security update for curl SUSE / openSUSE Security Updates · May 2, 2025
- ALAS2023-2023-083 Moderate: curl security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 15, 2024
- WID-SEC-2023-1614 Tenable Security Nessus Network Monitor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 25, 2023
- WID-SEC-2023-1728 Autodesk AutoCAD: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 11, 2023
- SSA-146325 SSA-146325: Multiple Vulnerabilities in RUGGEDCOM ROX before V2.16 Siemens ProductCERT · Jul 11, 2023
- WID-SEC-2022-1461 IBM Spectrum Protect: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 20, 2023
- WID-SEC-2023-0132 Oracle Fusion Middleware: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 1, 2023
- WID-SEC-2023-0125 Oracle PeopleSoft: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 17, 2023
- ALAS2-2022-1808 Moderate: curl security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 14, 2022
- ELSA-2022-5245 Moderate: curl security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 30, 2022
- ELSA-2022-5313 Moderate: curl security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 30, 2022
References
- https://hackerone.com/reports/1555796
- https://security.netapp.com/advisory/ntap-20220609-0009/
- DSA-5197 vendor-advisory
- [debian-lts-announce] 20220828 [SECURITY] [DLA 3085-1] curl security update mailing-list
- GLSA-202212-01 vendor-advisory
- [oss-security] 20230320 [SECURITY ADVISORY] curl: CVE-2023-27538: SSH connection too eager reuse still mailing-list