VDB
RHSA-2026:57457
RHSA-2026:57457
PUBLISHED
CVSS 7 HIGH
Record from redhat · Published August 25, 2026
A flaw was found in AMD Zen 2-based processors, affecting components such as the kernel and Xen hypervisor. Improper isolation of shared resources within the CPU operation cache could allow an attacker to corrupt instructions executed at a different privilege level. This could potentially result in privilege escalation, granting an attacker higher system access than intended.
Risk scores
CVSS 3.1
7
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | rhcos-x86_64-4.21.9.6.202608180431-0 as a component of Red Hat OpenShift Container Platform 4.21 | 4.21.9.6.202608180431-0 |
| Red Hat | rhcos-s390x-4.21.9.6.202608180431-0 as a component of Red Hat OpenShift Container Platform 4.21 | 4.21.9.6.202608180431-0 |
| Red Hat | rhcos-aarch64-4.21.9.6.202608180431-0 as a component of Red Hat OpenShift Container Platform 4.21 | 4.21.9.6.202608180431-0 |
| Red Hat | rhcos-ppc64le-4.21.9.6.202608180431-0 as a component of Red Hat OpenShift Container Platform 4.21 | 4.21.9.6.202608180431-0 |
Timeline
- Aug 25, 2026 CVE Published
- Sep 1, 2026 CVE Updated
- Sep 1, 2026 Distribution Patch (2 in total, the first dated here)
- Sep 1, 2026 Security Advisory (4 in total, the first dated here)
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References
- https://access.redhat.com/errata/RHSA-2026:57457 advisory
- https://access.redhat.com/security/updates/classification/#important advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2467015 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2477784 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2477915 issue
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_57457.json advisory
- https://access.redhat.com/security/cve/CVE-2025-54518 advisory
- https://www.cve.org/CVERecord?id=CVE-2025-54518 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2025-54518 advisory
- http://www.openwall.com/lists/oss-security/2026/05/12/15 advisory
- http://xenbits.xen.org/xsa/advisory-490.html advisory
- https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-7052.html advisory
- https://access.redhat.com/security/cve/CVE-2026-43112 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-43112 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-43112 advisory
- https://lore.kernel.org/linux-cve-announce/2026050625-CVE-2026-43112-f37f@gregkh/T advisory
- https://access.redhat.com/security/cve/CVE-2026-46483 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-46483 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-46483 advisory
- https://github.com/vim/vim/commit/3fb5e58fbc63d86a3e65f1a141b0d67af2aa38a1 advisory
…and 2 more