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Fencer Vulns
low 3.9

CVE-2026-15028 json

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

published 2026-07-10 4 mo ago modified 2026-11-06 3 d ago also EUVD-2026-42865

cvss
3.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:3.7.7-11.el10_2
  • Red Hat Red Hat Cost Management On-Premise 1 1791460851
  • Red Hat Red Hat Hardened Images 3.8.8-2.1.hum1
  • libarchive Debian 12 3.6.2-1+deb12u5
  • libarchive Debian 14 3.8.9-1

debian advisories DEBIAN-CVE-2026-15028

  • libarchive Ubuntu 26.04 LTS 3.8.5-1ubuntu2.2

ubuntu advisories UBUNTU-CVE-2026-15028

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libarchive RHEL 10.2 3.7.7-11.el10_2
  • bsdtar RHEL 10.2 3.7.7-11.el10_2
  • bsdcat hummingbird 1 3.8.8-2.1.hum1
  • bsdtar hummingbird 1 3.8.8-2.1.hum1
  • bsdcpio hummingbird 1 3.8.8-2.1.hum1
  • bsdunzip hummingbird 1 3.8.8-2.1.hum1
  • libarchive hummingbird 1 3.8.8-2.1.hum1

red hat advisories RHSA-2026:69553RHSA-2026:38279

  • libarchive AlmaLinux 10 3.7.7-11.el10_2
  • bsdtar AlmaLinux 10 3.7.7-11.el10_2

almalinux advisories ALSA-2026:69553

  • libarchive Rocky Linux 10 3.7.7-11.el10_2

rocky linux advisories RLSA-2026:69553

  • libarchive Azure Linux 3.0 3.7.7-7

azure linux advisories AZL-92331

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-15028 updated cvss 3.9

libarchive: heap overflow OOB read while parsing a tar archive contains a PAX extended header

  • Red Hat Enterprise Linux 6 libarchive Red Hat Enterprise Linux 7 bsdtar, bsdcpio, libarchive
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 9 bsdtar, libarchive Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-9 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9, rhoai/odh-dashboard-rhel9, rhoai/odh-mod-arch-maas-rhel9, rhoai/odh-mod-arch-automl-rhel9, rhoai/odh-mod-arch-gen-ai-rhel9, rhoai/odh-mod-arch-mlflow-rhel9, +6 more
    under investigation
  • Red Hat Cost Management On-Premise 1 costmanagement/costmanagement-ui-rhel10 1791460851
    fixed: vendor fix RHSA-2026:79357
  • Red Hat Enterprise Linux AppStream (v. 10) bsdtar 3.7.7-11.el10_2 Red Hat Enterprise Linux BaseOS (v. 10) libarchive 3.7.7-11.el10_2
    fixed: vendor fix RHSA-2026:69553
  • Red Hat Hardened Images bsdcat 3.8.8-2.1.hum1, bsdtar 3.8.8-2.1.hum1, bsdcpio 3.8.8-2.1.hum1, bsdunzip 3.8.8-2.1.hum1, libarchive 3.8.8-2.1.hum1
    fixed: vendor fix RHSA-2026:38279
  • Red Hat Enterprise Linux 8 bsdtar, libarchive Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9, rhoai/odh-kube-rbac-proxy-rhel9, rhoai/odh-maas-controller-rhel9, rhoai/odh-mlflow-operator-rhel9, rhoai/odh-model-controller-rhel9, rhoai/odh-ogx-k8s-operator-rhel9, +14 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
3 mo ago

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 3.9 CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Cost Management On-Premise 1
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift AI (RHOAI)
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat OpenShift Container Platform 5

Classification

Weakness
  • CWE-805 Buffer Access with Incorrect Length Value
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.