High [CVE-2026-56848] Heap-use-after-free in HTTP/2 handling can lead to denial of service
This high-severity Red Hat Linux advisory covers CVE-2026-56848; related products: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.
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Summary
Heap-use-after-free in HTTP/2 handling can lead to denial of service. Red Hat rates this important (CVSS 7.5).
Weakness: CWE-825.
Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
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 2 months ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Restrict network access to Node.js HTTP/2 listeners to trusted clients only. If HTTP/2 is not required, disable it to remove the vulnerable handler from the attack surface.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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