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CVE-2026-15028 is a heap overflow vulnerability in libarchive triggered while parsing a specially crafted tar archive. The flaw occurs during processing of a PAX extended header that contains a malformed SUN.holesdata sparse-file attribute. Improper handling of this sparse-file metadata can cause out-of-bounds writes to heap memory during archive parsing. An attacker able to supply a malicious archive to an application or service using vulnerable libarchive code can exploit the flaw to crash the process or potentially achieve arbitrary code execution.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
8 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.