Loading vulnerability…
CVE-2026-5121 is an integer-overflow vulnerability in libarchive's zisofs block-pointer allocation logic during ISO9660 image processing. On 32-bit systems, a specially crafted ISO9660 image can cause an allocation-size calculation to wrap, resulting in an undersized heap allocation followed by a heap buffer overflow.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
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.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
27 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A libarchive vulnerability that allows arbitrary code execution via an integer overflow in ISO9660 image processing.
A libarchive arbitrary code execution vulnerability caused by an integer overflow in ISO9660 image processing.
A libarchive integer-overflow vulnerability in ISO9660 image processing that allows arbitrary code execution.
A libarchive arbitrary code execution vulnerability via integer overflow in ISO9660 image processing.
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.