Detections
Analytics

Oracle Linux 9 : ELSA-2026-61581-0: / tar (ELSA-2026-615810)

medium Nessus Plugin ID 342415

Synopsis

The remote Oracle Linux host is missing one or more security updates.

Description

The remote Oracle Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2026-615810 advisory.

 - Backport upstream patches for CVE-2026-18477, fixes a bug where incremental restore with cyclic renames between backups may create a temporary directory at an archive-controlled path outside the extraction tree.
 The fix for CVE-2025-45582 already prevents exploiting this problem, so it is more a correctness and hardening change.
 - Backport upstream fix for CVE-2026-5704 (file injection hidden from -t)
 - Fix --one-top-level with absolute path (broken by the CVE-2025-45582 fix) Also fixes CVE-2026-18508 (escape from --one-top-level via hardlinks).

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected tar package.

See Also

https://linux.oracle.com/errata/ELSA-2026-61581-0.html

Plugin Details

Severity: Medium

ID: 342415

File Name: oraclelinux_ELSA-2026-615810.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/2/2026

Updated: 9/2/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.62

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.8

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

CVSS Score Source: CVE-2026-5704

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:oracle:linux:9, cpe:/o:oracle:linux:9:8:baseos_patch, p-cpe:/a:oracle:linux:tar

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/OracleLinux

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/1/2026

Vulnerability Publication Date: 4/6/2026

Reference Information

CVE: CVE-2026-18477, CVE-2026-18508, CVE-2026-5704