Loading vulnerability…
CVE-2026-56003 is a heap-based buffer overflow in libXfont2 versions before 2.0.8. While parsing a PCF font, ComputeScaledProperties() allocates a fixed property buffer of 70 slots (1120 bytes) but does not enforce its capacity when adding derived properties. Matching unscaled properties consume one slot, while scaled X or Y properties consume two slots. Because duplicate properties are not deduplicated, a crafted PCF font containing sufficiently many matching properties can cause writes beyond the allocated heap buffer.
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.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-impact, network-reachable vulnerability in libxfont2-related packages on Huawei EulerOS 2.0. The supplied CVSS v3 vector indicates low attack complexity, required low privileges, no user interaction, and high confidentiality, integrity, and availability impact. No known exploit is reported.
A network-reachable, low-complexity vulnerability requiring low privileges and no user interaction, with high confidentiality, integrity, and availability impact according to the supplied CVSS v3 vector. It is addressed by the Huawei EulerOS SA-2026-3347 update for libxfont2 packages.
A heap buffer overflow in libXfont2's ComputeScaledProperties() when parsing PCF files, caused by missing size checks in the property buffer. It may allow authenticated X clients to execute code within the X server.
One of three vulnerabilities fixed in libXfont 2.0.8 related to processing PCF font files.
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.