Description
libcurl would wrongly close the same eventfd file descriptor twice when taking
down a connection channel after having completed a threaded name resolve.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| curl | curl | 8.11.1 – ≤ 8.11.1 | — |
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 | 8.12.0+git20250209.89ed161+ds-1 | — |
| Debian 13 | curl | 8.12.0+git20250209.89ed161+ds-1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | curl | 8.14.1-150600.4.28.1 | SUSE-SU-2025:03198-1 |
| SLES 15 SP6 | curl | 8.14.1-150600.4.28.1 | SUSE-SU-2025:03198-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.1 | curl | 8.12.1-slfo.1.1_1.1 | SUSE-SU-2025:20239-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | curl | 8.12.1-1.1 | openSUSE-SU-2025:14809-1 |
| openSUSE Leap 15.6 | curl | 8.14.1-150600.4.28.1 | SUSE-SU-2025:03198-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | curl | 8.12.0-r0 | — |
| Alpine v3.23 | curl | 8.12.0-r0 | — |
| Alpine v3.22 | curl | 8.12.0-r0 | — |
| Alpine v3.21 | curl | 8.12.0-r0 | — |
| Alpine v3.20 | curl | 8.12.0-r0 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | curl | 8.12.0-r0 | — |
| Alpine v3.18 | curl | 8.12.0-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | curl | 8.11.1-3 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | curl | 8.12.0-r0 | — |
Advisories 10
- WID-SEC-2025-0270 cURL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 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
- SUSE-SU-2025:03198-1 Security update for curl SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20239-1 Security update for curl SUSE / openSUSE Security Updates · Mar 23, 2026
- ICSA-26-043-06 Siemens SINEC OS CISA ICS & IT advisories · Feb 25, 2026
- SSA-089022 SSA-089022: Multiple Vulnerabilities in Third-Party Components in SINEC OS before V3.3 Siemens ProductCERT · Feb 24, 2026
- openSUSE-SU-2025:14809-1 curl-8.12.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- NCSC-2025-0246 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Aug 12, 2025
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- VDE-2025-053 Phoenix Contact: Multiple Vulnerabilities in PLCnext Firmware CERT@VDE · Jul 8, 2025