CVE-2026-89838
Published: September 18, 2026Last modified: October 8, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.1 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Vulnerable (6.1.182-r0) |
| 25 LTS | linux-lts | Fixed (6.12.112-r0) | |
| Stream | linux-lts | Fixed (6.18.53-r0) |
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/7ab1780074943508534343e1e5e5ab0c9ef9dd7b
- https://git.kernel.org/stable/c/e754120f8ede55cc773ade108cf7e5b17c859c46