CVE-2026-72318Critical· 9.4▾ MidnightIn the Linux kernel, the following vulnerability has been resolved: cifs: validate DFS referral string offsets parse_dfs_referrals() validates that the response header and referral array fit in the received buffer, but each referral al…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 51.7 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.6%
In the Linux kernel, the following vulnerability has been resolved:
cifs: validate DFS referral string offsets
parse_dfs_referrals() validates that the response header and referral array fit in the received buffer, but each referral also contains string offsets supplied by the server.
Those offsets are used to compute the DfsPath and NetworkAddress string pointers without checking whether they still point inside the response buffer. A malformed referral can therefore make the computed pointer exceed the end of the buffer. The resulting negative max_len is then passed to cifs_strndup_from_utf16(), and the non-Unicode path forwards it to kstrndup() as a size_t, allowing strnlen() to read out of bounds.
Validate each string offset before deriving the string pointer.
Linux >= 4ecce920e13ace16a5ba45efe8909946c28fb2ad < 76c607b9353d377b1d1b11db50e743eee0ccf658Linux >= 4ecce920e13ace16a5ba45efe8909946c28fb2ad < d64b6be5740ce230aca184d8d224c75d9866045dLinux >= 4ecce920e13ace16a5ba45efe8909946c28fb2ad < 929a85932d14190988f1eafd6ee8cc68d66ace0bLinux >= 4ecce920e13ace16a5ba45efe8909946c28fb2ad < b784cd1c24d89bf71be2efe1e948ff7c03371e57Linux >= 4ecce920e13ace16a5ba45efe8909946c28fb2ad < c37abc99bb3de3d3219ecef253d649f74117fd83Linux >= 4ecce920e13ace16a5ba45efe8909946c28fb2ad < 027a84ac6b50c12ef767c15abfc58aa865820e9eLinux 4.11Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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