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

🗓️ 25 Jun 2026 11:00:00Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 17 Views

Go archive/tar reader can allocate unbounded memory parsing GNU sparse pax 1.0 regions, causing DoS.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8aarch64podman3:4.4.1-19.rhaos4.13.el8podman-3:4.4.1-19.rhaos4.13.el8.aarch64.rpm
Red Hat Enterprise Linux8ppc64lepodman3:4.4.1-19.rhaos4.13.el8podman-3:4.4.1-19.rhaos4.13.el8.ppc64le.rpm
Red Hat Enterprise Linux8s390xpodman3:4.4.1-19.rhaos4.13.el8podman-3:4.4.1-19.rhaos4.13.el8.s390x.rpm
Red Hat Enterprise Linux8x86_64podman3:4.4.1-19.rhaos4.13.el8podman-3:4.4.1-19.rhaos4.13.el8.x86_64.rpm
Red Hat Enterprise Linux9aarch64podman3:4.4.1-20.rhaos4.13.el9podman-3:4.4.1-20.rhaos4.13.el9.aarch64.rpm
Red Hat Enterprise Linux9ppc64lepodman3:4.4.1-20.rhaos4.13.el9podman-3:4.4.1-20.rhaos4.13.el9.ppc64le.rpm
Red Hat Enterprise Linux9s390xpodman3:4.4.1-20.rhaos4.13.el9podman-3:4.4.1-20.rhaos4.13.el9.s390x.rpm
Red Hat Enterprise Linux9x86_64podman3:4.4.1-20.rhaos4.13.el9podman-3:4.4.1-20.rhaos4.13.el9.x86_64.rpm
Red Hat Enterprise Linux8aarch64podman-catatonit3:4.4.1-19.rhaos4.13.el8podman-catatonit-3:4.4.1-19.rhaos4.13.el8.aarch64.rpm
Red Hat Enterprise Linux8ppc64lepodman-catatonit3:4.4.1-19.rhaos4.13.el8podman-catatonit-3:4.4.1-19.rhaos4.13.el8.ppc64le.rpm
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20 Aug 2026 16:03Current
7.1High risk
Vulners AI Score7.1
CVSS 3.14.3
EPSS0.00413
SSVC
CWE-770
archive/targnu sparsepax 1.0memory allocationdenial of service
17