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golang: archive/tar: Unbounded allocation when parsing GNU sparse map

🗓️ 01 Apr 2026 09:29:07Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 11 Views

Go archive/tar tar.Reader lacks a limit on GNU pax 1.0 sparse blocks, risking exhaustion and DoS.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8aarch64skopeo2:1.16.1-5.rhaos4.17.el8skopeo-2:1.16.1-5.rhaos4.17.el8.aarch64.rpm
Red Hat Enterprise Linux8ppc64leskopeo2:1.16.1-5.rhaos4.17.el8skopeo-2:1.16.1-5.rhaos4.17.el8.ppc64le.rpm
Red Hat Enterprise Linux8s390xskopeo2:1.16.1-5.rhaos4.17.el8skopeo-2:1.16.1-5.rhaos4.17.el8.s390x.rpm
Red Hat Enterprise Linux8x86_64skopeo2:1.16.1-5.rhaos4.17.el8skopeo-2:1.16.1-5.rhaos4.17.el8.x86_64.rpm
Red Hat Enterprise Linux9aarch64skopeo2:1.16.1-5.rhaos4.17.el9skopeo-2:1.16.1-5.rhaos4.17.el9.aarch64.rpm
Red Hat Enterprise Linux9ppc64leskopeo2:1.16.1-5.rhaos4.17.el9skopeo-2:1.16.1-5.rhaos4.17.el9.ppc64le.rpm
Red Hat Enterprise Linux9s390xskopeo2:1.16.1-5.rhaos4.17.el9skopeo-2:1.16.1-5.rhaos4.17.el9.s390x.rpm
Red Hat Enterprise Linux9x86_64skopeo2:1.16.1-5.rhaos4.17.el9skopeo-2:1.16.1-5.rhaos4.17.el9.x86_64.rpm
Red Hat Enterprise Linux9aarch64skopeo-debuginfo2:1.16.1-5.rhaos4.17.el9skopeo-debuginfo-2:1.16.1-5.rhaos4.17.el9.aarch64.rpm
Red Hat Enterprise Linux9ppc64leskopeo-debuginfo2:1.16.1-5.rhaos4.17.el9skopeo-debuginfo-2:1.16.1-5.rhaos4.17.el9.ppc64le.rpm
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27 Jul 2026 10:09Current
7High risk
Vulners AI Score7
CVSS 3.14.3
EPSS0.00413
SSVC
11