In the Linux kernel, the following vulnerability has been resolved: cifs: validate DFS referral string offsets parse_dfs_referrals() va…
CVE-2026-72318 · published 15 Aug 2026
How serious is it
- Severity: critical, CVSS score 9.4 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-72318?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 4.11
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/027a84ac6b50c12ef767c15abfc58aa865820e9e
- git.kernel.org/stable/c/76c607b9353d377b1d1b11db50e743eee0ccf658
- git.kernel.org/stable/c/929a85932d14190988f1eafd6ee8cc68d66ace0b
- git.kernel.org/stable/c/b784cd1c24d89bf71be2efe1e948ff7c03371e57
- git.kernel.org/stable/c/c37abc99bb3de3d3219ecef253d649f74117fd83
- git.kernel.org/stable/c/d64b6be5740ce230aca184d8d224c75d9866045d
Merged from NVD. Last updated 23 Oct 2026. All vulnerabilities · RSS · JSON