High [CVE-2026-121520] Privilege escalation via unauthorized extended file attribute modification
This high-severity Red Hat Linux advisory covers CVE-2026-121520; related products: Assisted Installer for Red Hat OpenShift Container Platform 2, Compliance Operator, Confidential Compute Attestation.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Get an email when Red Hat Linux RHEL & SELinux publishes the next one.
See Red Hat Linux RHEL & SELinux's last 90 days of advisories first. Then choose the free weekly digest, or a free month of real-time alerts with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).
Summary
Privilege escalation via unauthorized extended file attribute modification. Red Hat rates this important (CVSS 7.9).
Weakness: CWE-22.
Affected products named by the advisory: Assisted Installer for Red Hat OpenShift Container Platform 2; Compliance Operator; Confidential Compute Attestation; Custom Metric Autoscaler operator for Red Hat Openshift; and 37 more.
Affected products named by the advisory: DPU kit for NVIDIA; Kernel Module Management Operator for Red Hat Openshift; Logical Volume Manager Storage; Migration Toolkit for Applications 8; and 33 more.
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 5 hours 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 5 hours ago·verify at source
Mitigation checklist
- Restrict access to the BuildKit control API socket and network endpoints to trusted administrative operators using strict file system permissions and mutual TLS. In multi-tenant environments, isolate build execution within dedicated, ephemeral virtual machines rather than sharing the daemon across untrusted tenants.
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
More Red Hat Linux advisories
- CVE-2026-111497Oct 22, 2026Out-of-Bounds Write in Google Brotli Decoder
- CVE-2026-48710May 26, 2026Security restriction bypass via malformed HTTP Host header
- CVE-2026-109619Oct 21, 2026fatal error handling retains stale request state leading to use-after-free
- CVE-2026-109618Oct 21, 2026OOM bailout during request parsing leads to memory corruption and RCE
- CVE-2026-119977Oct 31, 2026Arbitrary code execution via predictable upgrade staging paths
- CVE-2026-97229Oct 13, 2026integer overflow issue in CI/CD regular expression compiler
Android app · Google Play
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.