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CVE-2026-34544 is an integer overflow vulnerability in OpenEXR B44/B44A decoding that can cause an out-of-bounds write in uncompress_b44_impl(). OpenEXR versions 3.4.0 through versions before 3.4.8 are affected. Applications that decode a crafted B44 or B44A EXR image through exr_decoding_run() can crash or corrupt adjacent heap allocations. OpenEXR 3.4.8 fixes the vulnerability.
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What an attacker gets, and what they’ve been doing with it.
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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.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability with a local attack vector, low attack complexity, required user interaction, and high confidentiality, integrity, and availability impacts. The supplied CVSS versions differ on required privileges. Exploits and a patch are reported as available, but the affected product and underlying flaw are not identified.
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.