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Vulnerability · Published Apr 22, 2026 · Assigned by canonical

CVE-2026-35341uutils coreutils mkfifo Unauthorized Permission Change on Existing Files

High 7.1

In plain English

A high-severity incorrect permission assignment in coreutils from Uutils. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.2%top 94.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A vulnerability in uutils coreutils mkfifo allows for the unauthorized modification of permissions on existing files. When mkfifo fails to create a FIFO because a file already exists at the target path, it fails to terminate the operation for that path and continues to execute a follow-up set_permissions call. This results in the existing file's permissions being changed to the default mode (often 644 after umask), potentially exposing sensitive files such as SSH private keys to other users on the system.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12rust-coreutilsno fix listedDEBIAN-CVE-2026-35341
Debian:13rust-coreutilsno fix listedDEBIAN-CVE-2026-35341
Debian:14rust-coreutils0.10.0-1DEBIAN-CVE-2026-35341
Ubuntu:24.04:LTSrust-coreutilsno fix listedUBUNTU-CVE-2026-35341
Ubuntu:25.10rust-coreutilsno fix listedUBUNTU-CVE-2026-35341
Ubuntu:26.04:LTSrust-coreutilsno fix listedUBUNTU-CVE-2026-35341
Ubuntu:26.10rust-coreutilsno fix listedUBUNTU-CVE-2026-35341

Affected products (as reported)

VendorProductVersions
Uutils coreutils see references

Weakness: CWE-732 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References