f2fs: limit recovery filename logging to stored length
CVE-2026-89838 · published 16 Sept 2026
How serious is it
- Severity: high, CVSS score 7.1 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-2026-89838?
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: f356fe0cba0e3523e538987916bd2acedd4e6f41 to < e754120f8ede55cc773ade108cf7e5b17c859c46, f356fe0cba0e3523e538987916bd2acedd4e6f41 to < 7ab1780074943508534343e1e5e5ab0c9ef9dd7b, f356fe0cba0e3523e538987916bd2acedd4e6f41 to < 35c5abccd0924b02ad34126f562d93c8d75b0831, f356fe0cba0e3523e538987916bd2acedd4e6f41 to < 317d32e1a8deaf1c01c388badc667334c39e62ca
- Linux Linux: 3.11
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:
f2fs: limit recovery filename logging to stored length
F2FS stores recovery filenames as a length plus a fixed-size i_name
buffer. The buffer is not NUL-terminated, but recover_inode() and
recover_dentry() print it with %s.
For a 255-byte filename, recovery logging can read past i_name into the
following raw inode fields.
Print the name with a precision bounded by i_namelen and F2FS_NAME_LEN.
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/e754120f8ede55cc773ade108cf7e5b17c859c46
- git.kernel.org/stable/c/7ab1780074943508534343e1e5e5ab0c9ef9dd7b
- git.kernel.org/stable/c/35c5abccd0924b02ad34126f562d93c8d75b0831
- git.kernel.org/stable/c/317d32e1a8deaf1c01c388badc667334c39e62ca
- git.kernel.org/stable/c/01027b2fcb74dade59fb833b51023f6593b6a9a2
Merged from CVE List. Last updated 26 Oct 2026. All vulnerabilities · RSS · JSON