What’s Vulnerable › Vulnerabilities

CVE-2026-89838: f2fs: limit recovery filename logging to stored length

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-10-30

Description

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.

Affected products

• Linux: 3.11 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/01027b2fcb74dade59fb833b51023f6593b6a9a2
• https://git.kernel.org/stable/c/317d32e1a8deaf1c01c388badc667334c39e62ca
• https://git.kernel.org/stable/c/35c5abccd0924b02ad34126f562d93c8d75b0831
• https://git.kernel.org/stable/c/3d02c7c8446f5d6793ac67f93bf3f84bf24e3f25
• https://git.kernel.org/stable/c/450ab2e5dbe0ef6e3ed73214256565f6f003d62a
• https://git.kernel.org/stable/c/7ab1780074943508534343e1e5e5ab0c9ef9dd7b
• https://git.kernel.org/stable/c/b8ac8b14b9d92dd2e1cb05fa8994f41f701fbf28
• https://git.kernel.org/stable/c/e754120f8ede55cc773ade108cf7e5b17c859c46

Get alerted when CVE-2026-89838 or the next vulnerability affects your stack