CVE-2026-15028

Libarchive: heap overflow oob read while parsing a tar archive contains a pax extended header

publishedCWE-805CWE-122

A flaw was found in libarchive. This vulnerability allows a remote attacker to trigger a heap overflow by providing a specially crafted tar archive. The issue occurs during the parsing of a PAX extended header containing a malformed SUN.holesdata sparse-file attribute. Successful exploitation could lead to a denial of service, making the system unavailable, or potentially allow for arbitrary code execution, giving the attacker control over the affected system.

Technical severity3.9 lowCVSS 3.1 · CNA: redhat

Published2026-07-10Source updated 2026-11-02

Collected2026-11-022 attributed sources

Fixes and workarounds

Workaround

To mitigate this issue, avoid processing untrusted or unverified tar archives. Users should exercise caution when handling archives from unknown sources or those with unexpected content, as processing a specially crafted archive could trigger the vulnerability.

Source: CNA: redhat

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Red Hat Enterprise Linux 10 Red Hat `libarchive` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.7.7-11.el10_2; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Cost Management On-Premise 1 Red Hat `costmanagement/costmanagement-ui-rhel10` https://catalog.redhat.com/software/containers/	≥ 1791460851; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Hardened Images Red Hat `libarchive-main` https://catalog.redhat.com/software/containers/	≥ 3.8.8-2.1.hum1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 6 Red Hat `libarchive` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat Enterprise Linux 7 Red Hat `libarchive` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat Enterprise Linux 8 Red Hat `libarchive` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat Enterprise Linux 9 Red Hat `libarchive` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openshift/ose-rhel-coreos-9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 5 Red Hat `openshift/ose-rhel-coreos-9` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 3.9 low	`CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L`	CNA: redhat

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://access.redhat.com/errata/RHSA-2026:38279CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:69553CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:79357CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-15028CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2497970CNA: redhat · issue-tracking, x_refsource_REDHAT
https://github.com/libarchive/libarchive/issues/3251CNA: redhat
https://github.com/libarchive/libarchive/pull/3253CNA: redhat

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