High [CVE-2026-63076] invalid pointer dereference in CMP server via crafted protectionAlg
This high-severity Red Hat Linux advisory covers CVE-2026-63076 affecting Red Hat Developer Hub, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9.
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Summary
A flaw was found in OpenSSL. A crafted CMP (Certificate Management Protocol) message can cause an invalid pointer dereference due to a missing type check in the password-based protection verification.
A remote, unauthenticated attacker can crash applications acting as a CMP server or client, resulting in a denial of service. To exploit this issue, an attacker needs to supply a crafted CMP message to an application acting as a CMP server or client.
Server applications need to be configured to accept PBM-protected messages, and client applications need to communicate with a malicious or intercepted CMP server. There is no memory disclosure, no controlled memory write, and no path to code execution.
For these reasons, this vulnerability has been rated with a moderate severity. Red Hat severity: Moderate — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-476. Affected Red Hat products: Red Hat Developer Hub; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Hardened Images; Red Hat OpenShift Container Platform 4; Red Hat Satellite 6; Red Hat Satellite Client.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: edk2; Red Hat package: openssl.
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 1 hour 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 1 hour 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 1 hour ago·verify at source
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