A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time. If it is built to use the synchronous resolver, it allows name resolves to time-out slow operations using `alarm()` and `siglongjmp()`. When doing this, libcurl used a global buffer that was not mutex protected and a multi-threaded application might therefore crash or otherwise misbehave.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://hackerone.com/reports/1929597 Exploit, Patch, Third Party Advisory
- https://hackerone.com/reports/1929597 Exploit, Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.9 · haxx, apple, netappNVD modified 2026-10-23 23:10
Affected (CPE criteria) 8
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*cpe:2.3:a:netapp:ontap_antivirus_connector:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
References 18
- http://seclists.org/fulldisclosure/2023/Jul/47 Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Jul/48 Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Jul/52 Mailing List, Third Party Advisory
- https://hackerone.com/reports/1929597 Exploit, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202310-12 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230609-0009/ Third Party Advisory
- https://support.apple.com/kb/HT213843 Third Party Advisory
- https://support.apple.com/kb/HT213844 Third Party Advisory
- https://support.apple.com/kb/HT213845 Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Jul/47 Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Jul/48 Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2023/Jul/52 Mailing List, Third Party Advisory
- https://hackerone.com/reports/1929597 Exploit, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202310-12 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230609-0009/ Third Party Advisory
- https://support.apple.com/kb/HT213843 Third Party Advisory
- https://support.apple.com/kb/HT213844 Third Party Advisory
- https://support.apple.com/kb/HT213845 Third Party Advisory