Description
A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The Curl Project | curl | from 7.59.0 to 7.61.1 | — |
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 | 7.62.0-1 | — |
| Debian 13 | curl | 7.62.0-1 | — |
| Debian 12 | curl | 7.62.0-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | curl | 7.58.0-2ubuntu3.5 | USN-3805-1 |
| Ubuntu 16.04 LTS | curl | 7.47.0-1ubuntu2.11 | USN-3805-1 |
| Ubuntu 14.04 LTS | curl | 7.35.0-1ubuntu2.19 | USN-3805-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | curl | 7.60.0-3.14.3 | SUSE-SU-2018:3624-1 |
| SLES 12 SP4 | curl | 7.60.0-4.3.1 | SUSE-SU-2019:0339-1 |
| SLES 12 SP3 | curl | 7.37.0-37.31.1 | SUSE-SU-2018:3608-1 |
| SLES 11 SP4 | curl | 7.37.0-70.38.1 | SUSE-SU-2018:3681-1 |
| SLES 11 | curl-openssl1 | 7.37.0-70.38.1 | SUSE-SU-2018:3681-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP4 | curl | 7.60.0-4.3.1 | SUSE-SU-2019:0339-1 |
| SLES for SAP 12 SP3 | curl | 7.37.0-37.31.1 | SUSE-SU-2018:3608-1 |
| SLES for SAP 11 SP4 | curl | 7.37.0-70.38.1 | SUSE-SU-2018:3681-1 |
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 v3.24 | curl | 7.62.0-r0 | — |
| Alpine v3.23 | curl | 7.62.0-r0 | — |
| Alpine v3.22 | curl | 7.62.0-r0 | — |
| Alpine v3.21 | curl | 7.62.0-r0 | — |
| Alpine v3.20 | curl | 7.62.0-r0 | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | curl | 7.62.0-r0 | — |
| Alpine v3.18 | curl | 7.62.0-r0 | — |
| Alpine v3.17 | curl | 7.62.0-r0 | — |
| Alpine v3.16 | curl | 7.62.0-r0 | — |
| Alpine v3.15 | curl | 7.62.0-r0 | — |
| Alpine v3.14 | curl | 7.62.0-r0 | — |
| Alpine v3.13 | curl | 7.62.0-r0 | — |
| Alpine v3.12 | curl | 7.62.0-r0 | — |
| Alpine v3.11 | curl | 7.62.0-r0 | — |
| Alpine v3.10 | curl | 7.62.0-r0 | — |
| Alpine v3.9 | curl | 7.62.0-r0 | — |
| Alpine v3.8 | curl | 7.61.1-r1 | — |
| Alpine v3.7 | curl | 7.61.1-r1 | — |
| Alpine v3.6 | curl | 7.61.1-r1 | — |
| Alpine v3.5 | curl | 7.61.1-r1 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | curl +2 | 7.61.1-9.amzn2.0.1 | ALAS2-2019-1162 |
Advisories 8
- USN-3805-1 curl vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- openSUSE-SU-2024:10582-1 curl-7.79.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0339-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3624-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3681-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3608-1 Security update for curl SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-1641 cURL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 4, 2025
- ALAS2-2019-1162 Moderate: curl security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 18, 2019