Description
When libcurl is asked to perform automatic gzip decompression of
content-encoded HTTP responses with the `CURLOPT_ACCEPT_ENCODING` option,
**using zlib 1.2.0.3 or older**, an attacker-controlled integer overflow would
make libcurl perform a buffer overflow.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| curl | curl | 8.11.1 – ≤ 8.11.1, 8.11.0 – ≤ 8.11.0, 8.10.1 – ≤ 8.10.1, 8.10.0 – ≤ 8.10.0, 8.9.1 – ≤ 8.9.1, 8.9.0 – ≤ 8.9.0, 8.8.0 – ≤ 8.8.0, 8.7.1 – ≤ 8.7.1, 8.7.0 – ≤ 8.7.0, 8.6.0 – ≤ 8.6.0, 8.5.0 – ≤ 8.5.0, 8.4.0 – ≤ 8.4.0, 8.3.0 – ≤ 8.3.0, 8.2.1 – ≤ 8.2.1, 8.2.0 – ≤ 8.2.0, 8.1.2 – ≤ 8.1.2, 8.1.1 – ≤ 8.1.1, 8.… | — |
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 | — |
| Debian 12 | curl | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | curl | 8.6.0-150600.4.21.1 | SUSE-SU-2025:0369-1 |
| SLES 15 SP5 | curl | 8.0.1-150400.5.62.1 | SUSE-SU-2025:0370-1 |
| SLES 15 SP4 | curl | 8.0.1-150400.5.62.1 | SUSE-SU-2025:0370-1 |
| SLES 15 SP3 | curl | 7.66.0-150200.4.84.1 | SUSE-SU-2025:0372-1 |
| SLES 12 SP5 | curl | 8.0.1-11.105.1 | SUSE-SU-2025:0371-1 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP3 | curl | 7.66.0-150200.4.84.1 | SUSE-SU-2025:0372-1 |
| SLE Micro 6.0 | curl | 8.6.0-6.1 | SUSE-SU-2025:20144-1 |
| SLE Micro 5.5 | curl | 8.0.1-150400.5.62.1 | SUSE-SU-2025:0370-1 |
| SLE Micro 5.4 | curl | 8.0.1-150400.5.62.1 | SUSE-SU-2025:0370-1 |
| SLE Micro 5.3 | curl | 8.0.1-150400.5.62.1 | SUSE-SU-2025:0370-1 |
| SLE Micro 5.2 | curl | 7.66.0-150200.4.84.1 | SUSE-SU-2025:0372-1 |
| SLE Micro 5.1 | curl | 7.66.0-150200.4.84.1 | SUSE-SU-2025:0372-1 |
| SLE HPC 15 SP5 | curl | 8.0.1-150400.5.62.1 | SUSE-SU-2025:0370-1 |
| SLE HPC 15 SP4 | curl | 8.0.1-150400.5.62.1 | SUSE-SU-2025:0370-1 |
| SLE HPC 15 SP3 | curl | 7.66.0-150200.4.84.1 | SUSE-SU-2025:0372-1 |
| SUSE Manager Server 4.3 | curl | 8.0.1-150400.5.62.1 | SUSE-SU-2025:0370-1 |
| SUSE Linux Enterprise Installer Updates 15 SP5 | curl | 8.0.1-150400.5.62.1 | SUSE-SU-2025:0370-1 |
| SUSE Linux Enterprise Installer Updates 15 SP4 | curl | 8.0.1-150400.5.62.1 | SUSE-SU-2025:0370-1 |
| SUSE Enterprise Storage 7.1 | curl | 7.66.0-150200.4.84.1 | SUSE-SU-2025:0372-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | curl | 8.6.0-150600.4.21.1 | SUSE-SU-2025:0369-1 |
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 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | ecs-service-connect-agent | v1.34.4.2-1.amzn2023 | ALAS2023-2025-1357 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | curl | 8.11.1-3 | — |
| Azure Linux 3 | mysql | 8.0.42-1 | — |
| Azure Linux 2 (CBL-Mariner) | mysql | 8.0.40-4 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | curl | 8.12.0-r0 | — |
Advisories 17
- 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
- WID-SEC-2026-1203 Oracle Fusion Middleware: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 21, 2026
- SUSE-SU-2025:20144-1 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
- SUSE-SU-2025:0371-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0370-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0372-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0369-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-1567 Oracle MySQL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 20, 2026
- ALAS2023-2025-1357 Important: ecs-service-connect-agent security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jan 7, 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
- WID-SEC-2025-1572 Oracle Fusion Middleware: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 15, 2025
- WID-SEC-2025-1564 Oracle Siebel CRM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 15, 2025
- WID-SEC-2025-1551 Oracle Commerce: Schwachstelle gefährdet Vertraulichkeit, Integrität und Verfügbarkeit BSI CERT-Bund (WID) · Jul 15, 2025