Description
Due to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | https://github.com/curl/curl | libcurl 7.29.0 to and including 7.71.1 | — |
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 | 7.72.0-1 | — |
| Debian 13 | curl | 7.72.0-1 | — |
| Debian 12 | curl | 7.72.0-1 | — |
| Debian 10 | curl | 7.64.0-4+deb10u2 | DSA-4881-1 |
| Debian 9 | curl | 7.52.1-5+deb9u12 | DLA-2382-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | curl | 7.68.0-1ubuntu2.2 | USN-4665-1, USN-4466-1 |
| Ubuntu 18.04 LTS | curl | 7.58.0-2ubuntu3.10 | USN-4665-1, USN-4466-1 |
| Ubuntu 16.04 LTS | curl | 7.47.0-1ubuntu2.16 | USN-4665-1, USN-4466-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | curl | 7.35.0-1ubuntu2.20+esm5 | USN-4466-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | curl +3 | 7.61.1-18.el8 | RHSA-2021:1610 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | curl | 7.61.1-18.el8 | RLSA-2021:1610 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | curl | 7.66.0-4.6.1 | SUSE-SU-2020:2445-1 |
| SLES 15 SP1 | curl | 7.60.0-3.32.1 | SUSE-SU-2020:2446-1 |
| SLES 12 SP5 | curl | 7.60.0-11.6.1 | SUSE-SU-2020:2444-1 |
| SLES 12 SP4 | curl | 7.60.0-4.20.1 | SUSE-SU-2021:1786-1 |
| SLES 11 | curl-openssl1 | 7.37.0-70.52.2 | SUSE-SU-2020:14481-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | curl | 7.60.0-11.6.1 | SUSE-SU-2020:2444-1 |
| SLES for SAP 12 SP4 | curl | 7.60.0-4.20.1 | SUSE-SU-2021:1786-1 |
| SUSE OpenStack Cloud Crowbar 9 | curl | 7.60.0-4.20.1 | SUSE-SU-2021:1786-1 |
| SUSE OpenStack Cloud 9 | curl | 7.60.0-4.20.1 | SUSE-SU-2021:1786-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | curl | 7.79.1-1.1 | openSUSE-SU-2024:10582-1 |
| openSUSE Leap 15.2 | curl | 7.66.0-lp152.3.6.1 | openSUSE-SU-2020:1494-1, openSUSE-SU-2020:1359-1 |
| openSUSE Leap 15.2 | curl-mini | 7.66.0-lp152.3.9.1 | openSUSE-SU-2020:1494-1 |
| openSUSE Leap 15.1 | curl +1 | 7.60.0-lp151.5.15.1 | openSUSE-SU-2020:1345-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | curl | 7.72.0-r0 | — |
| Alpine v3.23 | curl | 7.72.0-r0 | — |
| Alpine v3.22 | curl | 7.72.0-r0 | — |
| Alpine v3.21 | curl | 7.72.0-r0 | — |
| Alpine v3.20 | curl | 7.72.0-r0 | — |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | curl | 7.72.0-r0 | — |
| Alpine v3.18 | curl | 7.72.0-r0 | — |
| Alpine v3.17 | curl | 7.72.0-r0 | — |
| Alpine v3.16 | curl | 7.72.0-r0 | — |
| Alpine v3.15 | curl | 7.72.0-r0 | — |
| Alpine v3.14 | curl | 7.72.0-r0 | — |
| Alpine v3.13 | curl | 7.72.0-r0 | — |
| Alpine v3.12 | curl | 7.69.1-r2 | — |
| Alpine v3.11 | curl | 7.67.0-r2 | — |
| Alpine v3.10 | curl | 7.66.0-r2 | — |
| Alpine v3.9 | curl | 7.66.0-r5 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | curl +2 | 7.76.1-4.amzn2.0.1 | ALAS2-2021-1693 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | curl +3 | 7.61.1-18.el8 | ELSA-2021-1610 |
Advisories 27
- RHSA-2021:1610 Red Hat Security Advisory: curl security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 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-2025-0227 IBM QRadar SIEM: 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
- USN-4665-1 curl vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-4466-2 curl vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-4466-1 curl vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4881-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2382-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:1610 Moderate: curl security and bug fix update Rocky Linux Security Advisories · Feb 5, 2026
- openSUSE-SU-2024:10582-1 curl-7.79.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2444-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1786-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2445-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:14481-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1494-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1359-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2446-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1345-1 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
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- ICSA-22-069-09 Siemens SINEC INS CISA ICS & IT advisories · May 6, 2025
- WID-SEC-2023-1635 libcurl: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Jul 4, 2023
- SSA-389290 SSA-389290: Third-Party Component Vulnerabilities in SINEC INS Siemens ProductCERT · Mar 8, 2022
- ALAS2-2021-1693 Moderate: curl security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 5, 2021
- ELSA-2021-1610 Moderate: curl security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 25, 2021
References
- https://hackerone.com/reports/948876
- https://curl.haxx.se/docs/CVE-2020-8231.html
- GLSA-202012-14 vendor-advisory
- DSA-4881 vendor-advisory
- [bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 mailing-list
- [bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 mailing-list
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf