CVE & CISA-KEV Catalog

CVE-2026-9080

UNSCORED
NVD

Description

Calling `curl_easy_pause()` within the event-based `CURLMOPT_SOCKETFUNCTION` callback triggers a use-after-free vulnerability, where libcurl attempts to store a flag using a dangling struct pointer immediately after that pointer's memory has been freed.

How to fix

Remediation Available
curlDebian
Fixed in:8.21.0~rc2-1CVE-2026-9080
curlUbuntu
Fixed in:7.35.0-1ubuntu2.20+esm20USN-8487-1
Fixed in:7.47.0-1ubuntu2.19+esm16USN-8487-1
Fixed in:7.58.0-2ubuntu3.24+esm9USN-8487-1
Fixed in:7.68.0-1ubuntu2.25+esm4USN-8487-1
Fixed in:7.81.0-1ubuntu1.25USN-8487-1
Fixed in:8.5.0-2ubuntu10.10USN-8487-1
Fixed in:8.14.1-2ubuntu1.4USN-8487-1
libcurl3Ubuntu
Fixed in:7.35.0-1ubuntu2.20+esm20USN-8487-1
Fixed in:7.47.0-1ubuntu2.19+esm16USN-8487-1
libcurl3-gnutlsUbuntu
Fixed in:7.35.0-1ubuntu2.20+esm20USN-8487-1
Fixed in:7.47.0-1ubuntu2.19+esm16USN-8487-1
Fixed in:7.58.0-2ubuntu3.24+esm9USN-8487-1
Fixed in:7.68.0-1ubuntu2.25+esm4USN-8487-1
Fixed in:7.81.0-1ubuntu1.25USN-8487-1
libcurl3-nssUbuntu
Fixed in:7.35.0-1ubuntu2.20+esm20USN-8487-1
Fixed in:7.47.0-1ubuntu2.19+esm16USN-8487-1
Fixed in:7.58.0-2ubuntu3.24+esm9USN-8487-1
Fixed in:7.68.0-1ubuntu2.25+esm4USN-8487-1
Fixed in:7.81.0-1ubuntu1.25USN-8487-1
libcurl3t64-gnutlsUbuntu
Fixed in:8.5.0-2ubuntu10.10USN-8487-1
Fixed in:8.14.1-2ubuntu1.4USN-8487-1
libcurl4Ubuntu
Fixed in:7.58.0-2ubuntu3.24+esm9USN-8487-1
Fixed in:7.68.0-1ubuntu2.25+esm4USN-8487-1
Fixed in:7.81.0-1ubuntu1.25USN-8487-1
libcurl4-gnutls-devUbuntu
Fixed in:7.35.0-1ubuntu2.20+esm20USN-8487-1
Fixed in:7.47.0-1ubuntu2.19+esm16USN-8487-1
Fixed in:7.58.0-2ubuntu3.24+esm9USN-8487-1
Fixed in:7.68.0-1ubuntu2.25+esm4USN-8487-1
Fixed in:7.81.0-1ubuntu1.25USN-8487-1
Fixed in:8.5.0-2ubuntu10.10USN-8487-1
Fixed in:8.14.1-2ubuntu1.4USN-8487-1
libcurl4-nss-devUbuntu
Fixed in:7.35.0-1ubuntu2.20+esm20USN-8487-1
Fixed in:7.47.0-1ubuntu2.19+esm16USN-8487-1
Fixed in:7.58.0-2ubuntu3.24+esm9USN-8487-1
Fixed in:7.68.0-1ubuntu2.25+esm4USN-8487-1
Fixed in:7.81.0-1ubuntu1.25USN-8487-1
libcurl4-openssl-devUbuntu
Fixed in:7.35.0-1ubuntu2.20+esm20USN-8487-1
Fixed in:7.47.0-1ubuntu2.19+esm16USN-8487-1
Fixed in:7.58.0-2ubuntu3.24+esm9USN-8487-1
Fixed in:7.68.0-1ubuntu2.25+esm4USN-8487-1
Fixed in:7.81.0-1ubuntu1.25USN-8487-1
Fixed in:8.5.0-2ubuntu10.10USN-8487-1
Fixed in:8.14.1-2ubuntu1.4USN-8487-1
libcurl4t64Ubuntu
Fixed in:8.5.0-2ubuntu10.10USN-8487-1
Fixed in:8.14.1-2ubuntu1.4USN-8487-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3.1 Vector

No CVSS vector data available.

Exploit Intelligence

0.21%probability of exploitation in 30 days
11thpercentile

Low risk: more likely to be exploited than 11% of all known CVEs.

References

Embed a live status badge for CVE-2026-9080
CVE-2026-9080 severity badge

Markdown

[![CVE-2026-9080](https://tridentstack.com/cve/badge/CVE-2026-9080.svg)](https://tridentstack.com/cve/CVE-2026-9080)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-9080"><img src="https://tridentstack.com/cve/badge/CVE-2026-9080.svg" alt="CVE-2026-9080"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-03.