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Linux Distros Unpatched Vulnerability : CVE-2026-70622

high Nessus Plugin ID 334894

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - tar-rs versions 0.4.11 through 0.4.46 contain a symlink escape vulnerability in the Builder::append_dir_all() function that allows attackers to read files outside the intended source root directory by planting symlinks in an attacker-controlled directory. When a privileged process archives an untrusted directory, the function follows symlinks without verifying that resolved targets remain within the source root, causing out-of-bounds files to be included in the archive as regular files and disclosed to the attacker. (CVE-2026-70622)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-70622

https://security-tracker.debian.org/tracker/CVE-2026-70622

https://ubuntu.com/security/CVE-2026-70622

Plugin Details

Severity: High

ID: 334894

File Name: unpatched_CVE_2026_70622.nasl

Version: 1.17

Type: Local

Agent: unix

Family: Misc.

Published: 8/12/2026

Updated: 11/3/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.67

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:N/A:N

CVSS Score Source: CVE-2026-70622

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 6

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

CVSS v4

Risk Factor: High

Base Score: 7.1

Threat Score: 4.9

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.10, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:rust-tar, p-cpe:/a:centos:centos:bootc, p-cpe:/a:centos:centos:cargo-doc, p-cpe:/a:centos:centos:cargo, p-cpe:/a:centos:centos:clippy, p-cpe:/a:centos:centos:igvm, p-cpe:/a:centos:centos:rls, p-cpe:/a:centos:centos:rpm-ostree-devel, p-cpe:/a:centos:centos:rpm-ostree-libs, p-cpe:/a:centos:centos:rpm-ostree, p-cpe:/a:centos:centos:rust-analysis, p-cpe:/a:centos:centos:rust-analyzer, p-cpe:/a:centos:centos:rust-debugger-common, p-cpe:/a:centos:centos:rust-doc, p-cpe:/a:centos:centos:rust-gdb, p-cpe:/a:centos:centos:rust-lldb, p-cpe:/a:centos:centos:rust-src, p-cpe:/a:centos:centos:rust-std-static-aarch64-unknown-none-softfloat, p-cpe:/a:centos:centos:rust-std-static-wasm32-unknown-unknown, p-cpe:/a:centos:centos:rust-std-static-wasm32-wasi, p-cpe:/a:centos:centos:rust-std-static-wasm32-wasip1, p-cpe:/a:centos:centos:rust-std-static-x86_64-unknown-none, p-cpe:/a:centos:centos:rust-std-static, p-cpe:/a:centos:centos:rust-toolset-srpm-macros, p-cpe:/a:centos:centos:rust-toolset, p-cpe:/a:centos:centos:rust, p-cpe:/a:centos:centos:rustfmt, p-cpe:/a:centos:centos:system-reinstall-bootc, p-cpe:/a:debian:debian_linux:rust-tar, p-cpe:/a:redhat:enterprise_linux:bootc, p-cpe:/a:redhat:enterprise_linux:cargo-doc, p-cpe:/a:redhat:enterprise_linux:cargo, p-cpe:/a:redhat:enterprise_linux:clippy, p-cpe:/a:redhat:enterprise_linux:igvm, p-cpe:/a:redhat:enterprise_linux:rls, p-cpe:/a:redhat:enterprise_linux:rpm-ostree-devel, p-cpe:/a:redhat:enterprise_linux:rpm-ostree-libs, p-cpe:/a:redhat:enterprise_linux:rpm-ostree, p-cpe:/a:redhat:enterprise_linux:rust-analysis, p-cpe:/a:redhat:enterprise_linux:rust-analyzer, p-cpe:/a:redhat:enterprise_linux:rust-debugger-common, p-cpe:/a:redhat:enterprise_linux:rust-doc, p-cpe:/a:redhat:enterprise_linux:rust-gdb, p-cpe:/a:redhat:enterprise_linux:rust-lldb, p-cpe:/a:redhat:enterprise_linux:rust-src, p-cpe:/a:redhat:enterprise_linux:rust-std-static-aarch64-unknown-none-softfloat, p-cpe:/a:redhat:enterprise_linux:rust-std-static-wasm32-unknown-unknown, p-cpe:/a:redhat:enterprise_linux:rust-std-static-wasm32-wasi, p-cpe:/a:redhat:enterprise_linux:rust-std-static-wasm32-wasip1, p-cpe:/a:redhat:enterprise_linux:rust-std-static-x86_64-unknown-none, p-cpe:/a:redhat:enterprise_linux:rust-std-static, p-cpe:/a:redhat:enterprise_linux:rust-toolset-srpm-macros, p-cpe:/a:redhat:enterprise_linux:rust-toolset, p-cpe:/a:redhat:enterprise_linux:rust, p-cpe:/a:redhat:enterprise_linux:rustfmt, p-cpe:/a:redhat:enterprise_linux:system-reinstall-bootc

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 8/10/2026

Reference Information

CVE: CVE-2026-70622