CVE-2026-9080 | UAF after pause in socket callback

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.

Published: 2026-07-03 Last update: 2026-07-03 Assigner: 2499f714-1537-4658-8207-48ae4bb9eae9 Source: 2499f714-1537-4658-8207-48ae4bb9eae9

Conclusion & alert: CVE-2026-9080 is rated Low Risk (10.8/100): low exploitation likelihood (EPSS 0.21%). Mandatory action: Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-9080

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-07-04 0.21%

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-9080

CVSS metrics for this CVE.

No CVSS data in dataset for this CVE.

Weakness enumeration for CVE-2026-9080

GitHub Security Advisory for CVE-2026-9080

GHSA-hf34-v47h-w6m3 · Severity: unknown — Calling `curl_easy_pause()` within the event-based `CURLMOPT_SOCKETFUNCTION` callback triggers a...

OS Trackers for CVE-2026-9080

vendor priority summary link
debian unimportant CVE-2026-9080 unimportant priority: Debian including 1 source packages (curl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2. https://security-tracker.debian.org/tracker/CVE-2026-9080
ubuntu low CVE-2026-9080 low priority: Ubuntu including 1 source packages (curl), 9 status rows across 9 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream, xenial): not-affected 6, released 2, pending 1. https://ubuntu.com/security/CVE-2026-9080

Affected software / configurations for CVE-2026-9080

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2026-9080

cvelogic Threat Intelligence