Description
curl before version 7.52.0 is vulnerable to a buffer overflow when doing a large floating point output in libcurl's implementation of the printf() functions. If there are any application that accepts a format string from the outside without necessary input filtering, it could allow remote attacks.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| redhat | curl | curl 7.52.0 | — |
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 | 7.52.1-1 | — |
| Debian 13 | curl | 7.52.1-1 | — |
| Debian 12 | curl | 7.52.1-1 | — |
| Debian 8 | curl | 7.38.0-4+deb8u13 | DLA-1568-1 |
| Debian 7 | curl | 7.26.0-1+wheezy18 | DLA-767-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | curl | 7.47.0-1ubuntu2.3 | USN-3441-1 |
| Ubuntu 14.04 LTS | curl | 7.35.0-1ubuntu2.11 | USN-3441-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 3 | httpd24-curl +2 | 7.61.1-1.el6 | RHSA-2018:3558 |
| RHEL 3 | httpd24-httpd +5 | 2.4.34-7.el6 | RHSA-2018:3558 |
| RHEL 3 | httpd24-mod_md | 2.4.34-7.el7 | RHSA-2018:3558 |
| RHEL 3 | httpd24-mod_ssl +1 | 1:2.4.34-7.el6 | RHSA-2018:3558 |
| RHEL 3 | httpd24-nghttp2 +2 | 1.7.1-7.el6 | RHSA-2018:3558 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | curl | 7.37.0-36.1 | SUSE-SU-2017:1042-1 |
| SLES 12 SP1 | curl | 7.37.0-36.1 | SUSE-SU-2017:1042-1 |
| SLES 11 SP4 | curl | 7.19.7-1.69.1 | SUSE-SU-2017:2312-1, SUSE-SU-2017:1043-1 |
| SLES 11 | curl-openssl1 | 7.19.7-1.69.1 | SUSE-SU-2017:2312-1, SUSE-SU-2017:1043-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Studio Onsite 1.3 | curl | 7.19.7-1.20.52.2 | SUSE-SU-2017:1117-1 |
| SLES for SAP 12 SP2 | curl | 7.37.0-36.1 | SUSE-SU-2017:1042-1 |
| SLES for SAP 12 SP1 | curl | 7.37.0-36.1 | SUSE-SU-2017:1042-1 |
| SLES for SAP 11 SP4 | curl | 7.19.7-1.69.1 | SUSE-SU-2017:2312-1, SUSE-SU-2017:1043-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | curl | 7.79.1-1.1 | openSUSE-SU-2024:10582-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.3 | curl | 7.52.1-r0 | — |
| Alpine v3.2 | curl | 7.52.1-r0 | — |
Advisories 11
- RHSA-2018:3558 Red Hat Security Advisory: httpd24 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- USN-3441-1 curl vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-767-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1568-1 curl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10582-1 curl-7.79.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1117-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1043-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2312-1 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
- SUSE-SU-2017:1042-1 Security update for curl SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-1651 libcurl: Schwachstelle ermöglicht Codeausführung BSI CERT-Bund (WID) · Jul 4, 2023
References
- RHSA-2018:3558 vendor-advisory
- [debian-lts-announce] 20181106 [SECURITY] [DLA 1568-1] curl security update mailing-list
- https://curl.haxx.se/docs/adv_20161221A.html
- https://github.com/curl/curl/commit/curl-7_51_0-162-g3ab3c16
- 1037515 vdb-entry
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- 95019 vdb-entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9586
- GLSA-201701-47 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