Low [CVE-2026-18924] Use-after-free in HTTP/2 Server Push with shared connections
This low-severity Red Hat Linux advisory covers CVE-2026-18924; related products: Red Hat Hardened Images, Confidential Compute Attestation, Red Hat Enterprise Linux 10.
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Summary
Use-after-free in HTTP/2 Server Push with shared connections. Red Hat rates this low (CVSS 3.7).
Weakness: CWE-416. Red Hat lists fixing advisory RHSA-2026:63161 with package curl-main-8.22.0-0.1.hum1, rust-main-1.98.0-1.hum1.
Affected products named by the advisory: Red Hat Hardened Images; Confidential Compute Attestation; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; and 11 more.
Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift Container Platform 4; Red Hat OpenShift Dev Spaces; and 7 more.
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 12 days ago·verify at source
- curl-main-8.22.0-0.1.hum1
- rust-main-1.98.0-1.hum1
- RHSA-2026:63161
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
Mitigation checklist
- Disable HTTP/2 Server Push (CURLMOPT_PUSHFUNCTION) and shared connection handles (CURL_LOCK_DATA_CONNECT) in libcurl clients to eliminate the vulnerable code path. If these features cannot be disabled, enforce host-based firewalls to restrict affected applications' outbound HTTPS traffic solely to trusted endpoints, neutralizing the risk of exploitation by malicious HTTP/2 servers.
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
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