High [CVE-2026-9080] Use-after-free via curl_easy_pause in CURLMOPT_SOCKETFUNCTION callback
This high-severity Red Hat Linux advisory covers CVE-2026-9080 affecting Red Hat Hardened Images.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
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Summary
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. A flaw was found in libcurl.
An attacker could potentially exploit this to cause a denial of service or execute arbitrary code. This could allow an attacker to achieve denial of service or arbitrary code execution without requiring user interaction or elevated privileges.
While dependent on a specific application implementation, the broad adoption of libcurl means Red Hat products leveraging this callback pattern could be affected. Red Hat severity: Moderate — CVSS 7.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).
Weakness: CWE-825. Affected Red Hat products: Red Hat Hardened Images.
Under investigation: Confidential Compute Attestation; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift Container Platform 4; Red Hat OpenShift Dev Spaces; Red Hat Trusted Profile Analyzer.
Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat JBoss Core Services as not affected. Red Hat fixing advisory: RHSA-2026:29017, RHSA-2026:34975.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 20 days ago·verify at source
- curl-main-8.21.0-0.1.hum1
- rust-main-1.96.1-1.hum1
- RHSA-2026:29017
- RHSA-2026:34975
Official advisory · high-confidence parse· fetched 20 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 20 days ago·verify at source
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