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CVE-2025-38051 is a use-after-free vulnerability in the Linux kernel SMB/CIFS client's directory-reading path. A race between concurrent cifs_readdir operations can release an SMB response buffer while cifs_fill_dirent subsequently accesses pointers into that buffer. The vulnerable path includes directory-query failures, such as smb2_query_dir_next returning -ERESTARTSYS when a fatal signal is pending, followed by use of stale search-information pointers. KASAN detected a four-byte read from freed memory. The flaw can cause a system crash and potentially disclose kernel information.
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A use-after-free vulnerability in the Linux kernel SMB/CIFS client caused by a race condition during concurrent readdir operations. KASAN output demonstrates a read from freed memory in cifs_fill_dirent. The listed CVSS v3 score is 7.0, with local access, high attack complexity, low privileges, and potential high confidentiality, integrity, and availability impacts. The advisory recommends updating the affected Google COS kernel packages.
A Linux kernel SMB/CIFS client use-after-free vulnerability in cifs_fill_dirent. A race during concurrent directory-read operations can access a released response buffer, potentially affecting confidentiality, integrity, and availability for a local authenticated attacker.
A vulnerability addressed by the referenced CentOS 7 security advisory.
A use-after-free vulnerability in the Linux kernel SMB/CIFS client function cifs_fill_dirent.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.