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CVE-2025-37803 is an integer-overflow vulnerability in the Linux kernel udmabuf driver's udmabuf_create() function. The page-limit calculation derives pglimit from size_limit_mb using 32-bit arithmetic before shifting, allowing the result to wrap and bypass intended DMA-buffer size enforcement. A local user with access to the udmabuf device may consequently request unexpectedly large allocations, potentially causing denial of service through memory pressure or allocation failures.
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No public exploit code observed for this vulnerability.
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12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A buffer-size overflow vulnerability during Linux kernel udmabuf creation. The fix casts size_limit_mb to u64 when calculating pglimit. The advisory rates the vulnerability High, with a CVSS v3 base score of 7.8 and a local attack vector requiring low privileges.
An Important-severity local vulnerability referenced by a CentOS 7 TuxCare security-check plugin. The listed CVSS v3 vector is AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating high confidentiality, integrity, and availability impact after local authenticated exploitation.
A Linux kernel udmabuf buffer-size overflow vulnerability occurring during udmabuf creation.
A Linux kernel udmabuf buffer-size overflow issue during udmabuf creation.
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.