EUVD-2026-64885
GHSA-pghw-ch4m-h3f9
Severity by source
AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
AV:L because processing occurs locally; AC:H for precise macro crafting; PR:N as attacker needs no system privileges; UI:R for mandatory victim-initiated build action.
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
A flaw was found in rpmbuild. When rpmbuild processes a crafted tarball in tarball mode, a specially designed tar member name can lead to macro injection. This vulnerability allows a remote attacker to execute arbitrary code on the system by convincing a user to build a malicious tarball.
AnalysisAI
Macro injection in rpmbuild's tarball mode allows arbitrary code execution on systems running Red Hat Enterprise Linux 6 through 10, Red Hat Hardened Images, and OpenShift Container Platform 4. When rpmbuild processes a tarball in tarball mode, specially crafted tar member names are interpreted as RPM macros, enabling an attacker who can distribute a malicious tarball to achieve full RCE in the context of the user running the build. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the victim invoke rpmbuild explicitly in tarball mode (using the appropriate rpmbuild flag that triggers tarball-based builds) against a tarball supplied or influenced by the attacker. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H produces a score of 7.0, correctly reflecting the full CIA triad impact offset by local attack vector and high complexity. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A threat actor publishes or submits a malicious source tarball - for example, as a contribution to an open-source project or as a typosquatted upstream release - containing a tar member whose name embeds RPM macro syntax. A developer or automated CI job downloads this tarball and invokes rpmbuild in tarball mode, causing rpmbuild to expand the malicious macro and execute attacker-controlled commands with the privileges of the build user. … |
| Remediation | No vendor-released patch version has been independently confirmed from available data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all systems running rpmbuild on RHEL 6-10, Red Hat Hardened Images, or OpenShift Container Platform 4; restrict tarball sources to vetted internal repositories and disable automated tarball processing from public sources. …
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