High [CVE-2026-46603] Denial of Service via excessive memory allocation
This high-severity Red Hat Linux advisory covers CVE-2026-46603 affecting Red Hat Advanced Cluster Management for Kubernetes 2.16, Red Hat Advanced Cluster Management for Kubernetes 2.17, Cryostat 4.
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Summary
VP8L decoding in golang.org/x/image/vp8l can allocate an excessive amount of memory when processing a crafted VP8L image containing many unused Huffman tree groups. This allows a remote attacker to cause a denial of service via memory exhaustion.
This is an Important severity flaw due to the potential for a remote attacker to trigger a denial of service. By providing a specially crafted VP8L image, an attacker can exploit a vulnerability in `golang.org/x/image/vp8l` that causes excessive memory allocation, leading to memory exhaustion in applications processing these images.
This could impact the availability of services utilizing the affected component. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-770. Affected Red Hat products: Red Hat Advanced Cluster Management for Kubernetes 2.16; Red Hat Advanced Cluster Management for Kubernetes 2.17; Cryostat 4.
Red Hat fixing advisory: RHSA-2026:71116, RHSA-2026:71117.
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 13 days ago·verify at source
- rhacm2/volsync-rhel9:1790103468
- rhacm2/volsync-rhel9:1790103429
- RHSA-2026:71116
- RHSA-2026:71117
Official advisory · high-confidence parse· fetched 13 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 13 days ago·verify at source
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