VDB
RHSA-2026%3A25042
RHSA-2026%3A25042
PUBLISHED
CVSS 7.5 HIGH
A flaw was found in HTTP/2, affecting various web servers. A remote attacker can exploit this vulnerability by combining an HPACK compression bomb with a zero-byte flow-control window. This technique allows a small amount of data to expand into large memory allocations on the server, which are then held, leading to a denial of service (DoS) by rendering the server inaccessible.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | httpd-main@src as a component of Red Hat Hardened Images | * |
| Red Hat | httpd-main@noarch as a component of Red Hat Hardened Images | * |
| Red Hat | httpd-main@x86_64 as a component of Red Hat Hardened Images | * |
| Red Hat | httpd-main@aarch64 as a component of Red Hat Hardened Images | * |
Timeline
- Jun 10, 2026 CVE Published
- Jun 11, 2026 CVE Updated
- Jun 11, 2026 Distribution Patch
- Jun 11, 2026 Distribution Patch
- Jun 11, 2026 Security Advisory
- Jun 11, 2026 Security Advisory
References
- https://access.redhat.com/errata/RHSA-2026:25042 advisory
- https://images.redhat.com/ advisory
- https://access.redhat.com/security/cve/CVE-2026-49975 advisory
- https://access.redhat.com/security/updates/classification/ advisory
- https://access.redhat.com/security/cve/CVE-2026-44186 advisory
- https://access.redhat.com/security/cve/CVE-2026-44631 advisory
- https://access.redhat.com/security/cve/CVE-2026-34355 advisory
- https://access.redhat.com/security/cve/CVE-2026-34356 advisory
- https://access.redhat.com/security/cve/CVE-2026-42535 advisory
- https://access.redhat.com/security/cve/CVE-2026-42536 advisory
- https://access.redhat.com/security/cve/CVE-2026-43951 advisory
- https://access.redhat.com/security/cve/CVE-2026-48913 advisory
- https://access.redhat.com/security/cve/CVE-2026-29167 advisory
- https://access.redhat.com/security/cve/CVE-2026-44185 advisory
- https://access.redhat.com/security/cve/CVE-2026-44119 advisory
- https://access.redhat.com/security/cve/CVE-2026-29170 advisory
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_25042.json advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2485371 issue
- https://access.redhat.com/security/vulnerabilities/RHSB-2026-007 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-49975 advisory
…and 2 more