CVE-2026-35359
Publication date 22 April 2026
Last updated 11 November 2026
Ubuntu priority
Description
A Time-of-Check to Time-of-Use (TOCTOU) vulnerability in the cp utility of uutils coreutils allows an attacker to bypass no-dereference intent. The utility checks if a source path is a symbolic link using path-based metadata but subsequently opens it without the O_NOFOLLOW flag. An attacker with concurrent write access can swap a regular file for a symbolic link during this window, causing a privileged cp process to copy the contents of arbitrary sensitive files into a destination controlled by the attacker.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| rust-coreutils | 26.10 stonking |
Fixed in 0.9.0-2ubuntu1
|
| 26.04 LTS resolute |
Fixed in 0.10.0-1ubuntu2~26.04.1
|
|
| 24.04 LTS noble |
Vulnerable
|
|
| 22.04 LTS jammy | Not in release |
Notes
john-breton
Fixed in 0.10.0-1ubuntu2~26.04.1 in resolute-updates (LP: #2166202), but not yet in the -security pocket.
Severity score breakdown
CVSS version: CVSS v3.0
Base score
4.7 · Medium
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
References
Related Ubuntu Security Notices (USN)
- USN-9041-1
- uutils coreutils vulnerabilities
- 11 November 2026