# CVE-2026-15028: Libarchive: heap overflow oob read while parsing a tar archive contains a pax extended header

Status: published. Published: 2026-07-10. Updated: 2026-11-02.

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.

## Remediation

- 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

- Red Hat / Red Hat Enterprise Linux 10 (libarchive): ≥ 0:3.7.7-11.el10_2; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Cost Management On-Premise 1 (costmanagement/costmanagement-ui-rhel10): ≥ 1791460851; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Hardened Images (libarchive-main): ≥ 3.8.8-2.1.hum1; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (libarchive): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (libarchive): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (libarchive): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (libarchive): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 5 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 3.9 (low); CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.20% as of 2026-11-02; percentile 10.36%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-805, CWE-122

## Exploit evidence

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

## References

- https://access.redhat.com/errata/RHSA-2026:38279 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:69553 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2026:79357 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2026-15028 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2497970 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://github.com/libarchive/libarchive/issues/3251 (CNA: redhat)

- https://github.com/libarchive/libarchive/pull/3253 (CNA: redhat)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-15028; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-15028; retrieved 2026-11-02; source updated Not reported

Revision: e7a8fcd4d099d142491bc85cd69bec916a33631f40a1dcbd7fe184ab1e42ff1b

Canonical: https://y2.dev/cve/CVE-2026-15028

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