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

CSIRTS triage

What

This vulnerability is a use after free issue after a pause in socket callback.

Who is affected

Deployments of Chromium-based browsers, including Microsoft Edge, are affected.

Urgency

Remediation is necessary as it could lead to potential exploitation, although it is currently not exploited.

Action

Update to the latest version of Chromium to mitigate this issue.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

low — CVSS 3.7

Published

2026-07-02

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-9080

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2026-90800.49% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• medium[UPDATE] [medium] cURL: Multiple vulnerabilitiescert-bund
• highCVE-2026-9080: Calling `curl_easy_pause()` within the event-based `CURLMOPT_SOCKETFUNCTION` callback triggers …nvd
• unknownMultiple vulnerabilities in cURL and libcurl (June 24, 2026)cert-fr-avis

More from Microsoft Security Response Center

• highCVE-2026-12064: proto-default skips SSH verification2026-07-02
• unknownCVE-2026-14125: Chromium: CVE-2026-14125 Uninitialized Use in ANGLE2026-07-02
• mediumCVE-2026-57987: Microsoft Edge (Chromium-based) Spoofing Vulnerability2026-07-02
• unknownCVE-2026-13775: Chromium: CVE-2026-13775 Use after free in GPU2026-07-02
• unknownCVE-2026-13779: Chromium: CVE-2026-13779 Use after free in Chromoting2026-07-02