UBUNTU-CVE-2026-32766

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Source
https://ubuntu.com/security/CVE-2026-32766
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32766.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-32766
Upstream
Published
2026-03-20T00:16:00Z
Modified
2026-03-25T17:36:53Z
Severity
  • 1.7 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

astral-tokio-tar is a tar archive reading/writing library for async Rust. In versions 0.5.6 and earlier, malformed PAX extensions were silently skipped when parsing tar archives. This silent skipping (rather than rejection) of invalid PAX extensions could be used as a building block for a parser differential, for example by silently skipping a malformed GNU “long link” extension so that a subsequent parser would misinterpret the extension. In practice, exploiting this behavior in astral-tokio-tar requires a secondary misbehaving tar parser, i.e. one that insufficiently validates malformed PAX extensions and interprets them rather than skipping or erroring on them. This vulnerability is considered low-severity as it requires a separate vulnerability against any unrelated tar parser. This issue has been fixed in version 0.6.0.

References

Affected packages

Ubuntu:25.10 / rust-astral-tokio-tar

Package

Name
rust-astral-tokio-tar
Purl
pkg:deb/ubuntu/rust-astral-tokio-tar@0.5.2-2?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.5.1-1
0.5.2-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.5.2-2",
            "binary_name": "librust-astral-tokio-tar-dev"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32766.json"