Loading vulnerability…
CVE-2026-34544 is an OpenEXR vulnerability affecting decoding of crafted EXR images using B44 or B44A compression. In vulnerable versions, applications that process attacker-controlled EXR files via exr_decoding_run() can trigger an integer-overflow-related bounds error during B44/B44A decode logic, resulting in an out-of-bounds write. The advisory context indicates this occurs during row pointer reconstruction in the B44/B44A decoder and leads to an invalid memcpy()-based write. The issue affects OpenEXR 3.4.0 through before 3.4.8; supporting advisory context also indicates affected supported branches included 3.3.0 through 3.3.8 and 3.2.0 through 3.2.6. The flaw was fixed in OpenEXR 3.4.8.
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.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Referenced as a related previously fixed integer overflow pattern in other decoders; no specific details beyond that are provided in the content.
An out-of-bounds write vulnerability in OpenEXR affecting versions 3.4.0 through before 3.4.8, triggered by a crafted B44 or B44A EXR file during decoding via exr_decoding_run().
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.