Risk Scores
CVSS v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu | Rust |
Timeline
- Apr 15, 2026 CVE Published
- Apr 15, 2026 Distribution Patch
=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3694 USN-8168-2: Rust vulnerability 15 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Rust Publisher: Ubuntu Operating System: Ubuntu Resolution: Patch/Upgrade CVE Names: CVE-2026-33056 Original Bulletin: https://ubuntu.com/security/notices/USN-8168-2 Comment: CVSS (Max): 6.5 CVE-2026-33056 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N) CVSS Source: NIST Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N EPSS (Max): 0.0% (1st) CVE-2026-33056 2026-04-14 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-8168-2: Rust vulnerability Publication date 14 April 2026 Overview rustc could be made to modify permissions on arbitrary directories. Releases 20.04 LTS 18.04 LTS 16.04 LTS 14.04 LTS --------------------------------------------------------------------------------- Open side navigation Packages o rustc - Rust systems programming language o rustc-1.76 - Rust systems programming language o rustc-1.77 - Rust systems programming language o rustc-1.78 - Rust systems programming language o rustc-1.79 - Rust systems programming language o rustc-1.80 - Rust systems programming language Details USN-8168-1 fixed a vulnerability in Rust. This update provides the corresponding update to Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. Original advisory details: It was discovered that tar-rs embedded in rustc incorrectly handled symlinks when unpacking a tar archive. If a user or automated system were tricked into processing a specially crafted tar archive, a remote attacker could use this issue to modify permissions of arbitrary directories outside the extraction root, and possibly escalate privileges. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu Package Version Release rustc - 1.75.0+dfsg0ubuntu1~bpo0-0ubuntu0.20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . rustc-1.76 - 1.76.0+dfsg0ubuntu1~bpo0-0ubuntu0.20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . rustc-1.77 - 1.77.2+dfsg1ubuntu1~bpo0-0ubuntu0.20.04.1 Ubuntu Pro 20.04 LTS Fix available with Ubuntu Pro . focal rustc-1.78 - 1.78.0+dfsg1ubuntu1~bpo0-0ubuntu0.20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . rustc-1.79 - 1.79.0+dfsg1ubuntu1~bpo0-0ubuntu0.20.04.3 Ubuntu Pro Fix available with Ubuntu Pro . rustc-1.80 - 1.80.1+dfsg0ubuntu1~bpo0-0ubuntu0.20.04.1 Ubuntu Pro Fix available with Ubuntu Pro . 18.04 LTS rustc - 1.65.0+dfsg0ubuntu1~llvm2-0ubuntu0.18.04.1 Ubuntu Pro Fix bionic available with Ubuntu Pro . 16.04 LTS rustc - 1.47.0+dfsg1+llvm-1ubuntu1~16.04.1ubuntu2 Ubuntu Pro Fix xenial available with Ubuntu Pro . 14.04 LTS rustc - 1.31.0+dfsg1+llvm-2ubuntu1~14.04.1ubuntu1 Ubuntu Pro Fix trusty available with Ubuntu Pro . --------------------------------------------------------------------------------- References o CVE-2026-33056 Related notices o USN-8168-1 o USN-8139-1 o USN-8138-1 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu | Rust |