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CVE-2025-37738 is a use-after-free vulnerability in the Linux kernel ext4 filesystem extended-attribute cleanup path. The ext4_xattr_inode_dec_ref_all() function could process extended-attribute entries located beyond the valid end entry during inode deletion and eviction. This resulted in a KASAN-detected four-byte read from a freed slab object. The fix makes ext4 ignore xattr entries past the applicable end boundary.
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Patch, then assume compromise.
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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.
24 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An important local vulnerability affecting Alma Linux 9.2, requiring low privileges and enabling high confidentiality, integrity, and availability impact according to the listed CVSS v3 vector.
A locally exploitable, high-impact vulnerability requiring low privileges and no user interaction, with high confidentiality, integrity, and availability impact according to the supplied CVSS v3 vector.
A locally exploitable vulnerability affecting Unity Linux/UOS Server systems, rated high impact for confidentiality, integrity, and availability under the listed CVSS vectors.
A Linux kernel ext4 vulnerability related to handling extended attributes past the end.
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.