Ubuntu 25.10 rustc Critical Permissions Escalation USN-8168-1

ubuntu

April 13, 2026

rustc could be made to modify permissions on arbitrary directories.

Summary

rustc could be made to modify permissions on arbitrary directories.

Software Description:

- rustc-1.85: Rust systems programming language

- rustc-1.88: Rust systems programming language

- rustc: Rust systems programming language

- rustc-1.74: Rust systems programming language

- rustc-1.76: Rust systems programming language

- rustc-1.77: Rust systems programming language

- rustc-1.78: Rust systems programming language

- rustc-1.79: Rust systems programming language

- rustc-1.80: Rust systems programming language

- rustc-1.81: Rust systems programming language

- rustc-1.82: Rust systems programming language

- rustc-1.83: Rust systems programming language

- rustc-1.84: Rust systems programming language

- rustc-1.89: Rust systems programming language

- rustc-1.91: Rust systems programming language

- rustc-1.62: Rust systems programming language

Details:

It was discovered that tar-rs embedded in rustc incorrectly handled

symlinks when unpacking a tar archive. If a user or automated s...

Read the Full Advisory

Topics Covered

security advisory critical remote access Ubuntu permissions rustc

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
  rustc-1.85                      1.85.1+dfsg0ubuntu2-0ubuntu1.25.04.1
  rustc-1.88                      1.88.0+dfsg0ubuntu1-0ubuntu2

Ubuntu 24.04 LTS
  rustc                           1.75.0+dfsg0ubuntu1-0ubuntu7.4
  rustc-1.74                      1.74.1+dfsg0ubuntu1-0ubuntu15
  rustc-1.76                      1.76.0+dfsg0ubuntu1-0ubuntu0.24.04.2
  rustc-1.77                      1.77.2+dfsg1ubuntu1-0ubuntu0.24.04.1
  rustc-1.78                      1.78.0+dfsg1ubuntu1-0ubuntu0.24.04.2
  rustc-1.79                      1.79.0+dfsg1ubuntu1-0ubuntu0.24.04.1
  rustc-1.80                      1.80.1+dfsg0ubuntu1-0ubuntu0.24.04.01
  rustc-1.81                      1.81.0+dfsg0ubuntu1-0ubuntu0.24.04.1
  rustc-1.82                      1.82.0+dfsg0ubuntu0-0ubuntu0.24.04.1
  rustc-1.83                      1.83.0+dfsg0ubuntu1~bpo2-0ubuntu0.24.04.1
  rustc-1.84                      1.84.1+dfsg0ubuntu1~bpo2-0ubuntu2.24.04.1
  rustc-1.85                      1.85.1+dfsg0ubuntu2~bpo0-0ubuntu0.24.04.2
  rustc-1.89                      1.89.0+dfsg~24.04-0ubuntu0.24.04.2
  rustc-1.91                      1.91.1+dfsg~24.04-0ubuntu0.24.04.2

Ubuntu 22.04 LTS
  rustc                           1.75.0+dfsg0ubuntu1~bpo0-0ubuntu0.22.04.1
  rustc-1.62                      1.62.1+dfsg1-1ubuntu0.22.04.3
  rustc-1.76                      1.76.0+dfsg0ubuntu1~bpo0-0ubuntu0.22.04.1
  rustc-1.77                      1.77.2+dfsg1ubuntu1~bpo0-0ubuntu0.22.04.1
  rustc-1.78                      1.78.0+dfsg1ubuntu1~bpo0-0ubuntu0.22.04.1
  rustc-1.79                      1.79.0+dfsg1ubuntu1~bpo0-0ubuntu0.22.04.1
  rustc-1.80                      1.80.1+dfsg0ubuntu1~bpo0-0ubuntu0.22.04.1
  rustc-1.81                      1.81.0+dfsg0ubuntu0-0ubuntu0.22.04.1
  rustc-1.82                      1.82.0+dfsg0ubuntu0~jammy-0ubuntu0.22.04.1
  rustc-1.83                      1.83.0+dfsg0ubuntu2~bpo2-0ubuntu2.22.04.1
  rustc-1.84                      1.84.1+dfsg0ubuntu1~bpo10-0ubuntu4.22.04.1
  rustc-1.85                      1.85.1+dfsg0ubuntu2~bpo0-0ubuntu1.22.04.1
  rustc-1.89                      1.89.0+dfsg~24.04-0ubuntu0.22.04.2
  rustc-1.91                      1.91.1+dfsg~22.04-0ubuntu0.22.04.3

In general, a standard system update will make all the necessary changes.