VDB
RHSA-2026%3A16155
RHSA-2026%3A16155
PUBLISHED
CVSS 7.800000190734863 HIGH
A flaw was found in the Linux kernel's xfrm-ESP and RxRPC subsystems. Unsafe in-place cryptographic processing of shared socket buffer fragments allows a low-privileged local attacker to corrupt page-cache contents of readable files, including sensitive system files, and gain root privileges. The xfrm-ESP variant requires unprivileged user or network namespace creation, while the RxRPC variant depends on the rxrpc module being available on the target system.
Risk Scores
CVSS 3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | rhcos-ppc64le-4.21.9.6.202605110143-0 as a component of Red Hat OpenShift Container Platform 4.21 | 4.21.9.6.202605110143-0, 4.21.9.6.202605110143-0, rhcos-ppc64le-4.21.9.6.202605110143-0 |
| Red Hat | rhcos-s390x-4.21.9.6.202605110143-0 as a component of Red Hat OpenShift Container Platform 4.21 | 4.21.9.6.202605110143-0, 4.21.9.6.202605110143-0, * |
| Red Hat | rhcos-x86_64-4.21.9.6.202605110143-0 as a component of Red Hat OpenShift Container Platform 4.21 | 4.21.9.6.202605110143-0, 4.21.9.6.202605110143-0, rhcos-x86_64-4.21.9.6.202605110143-0 |
| Red Hat | rhcos-aarch64-4.21.9.6.202605110143-0 as a component of Red Hat OpenShift Container Platform 4.21 | 4.21.9.6.202605110143-0, rhcos-aarch64-4.21.9.6.202605110143-0, 4.21.9.6.202605110143-0 |
Timeline
- May 13, 2026 CVE Published
- May 13, 2026 Distribution Patch
- May 13, 2026 Distribution Patch
- May 13, 2026 Security Advisory
- May 13, 2026 Security Advisory
- May 15, 2026 CVE Updated
References
- https://access.redhat.com/errata/RHSA-2026:16155 advisory
- https://access.redhat.com/security/updates/classification/#important advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2467771 issue
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_16155.json advisory
- https://access.redhat.com/security/cve/CVE-2026-43284 advisory
- https://access.redhat.com/security/vulnerabilities/RHSB-2026-003 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-43284 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-43284 advisory
- https://dirtyfrag.io/ advisory