CVE-2026-15028: Heap Overflow (CVSS 3.9)

Description

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.

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CVSS v3.1 Score

3.9

LOW

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L

EPSS — Exploit Prediction

0.0020

Probability of exploitation

0.10%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-122 CWE-122

References

Other References

https://access.redhat.com/errata/RHSA-2026:38279 https://access.redhat.com/security/cve/CVE-2026-15028 https://bugzilla.redhat.com/show_bug.cgi?id=2497970 https://github.com/libarchive/libarchive/issues/3251 https://github.com/libarchive/libarchive/pull/3253

Frequently Asked Questions

What is CVE-2026-15028? +

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. It has a CVSS v3.1 base score of 3.9 (LOW).

How severe is CVE-2026-15028? +

CVE-2026-15028 has a CVSS v3.1 score of 3.9 out of 10, rated LOW. This is a low-severity vulnerability with limited impact. The EPSS score is 0.0020, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-15028? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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