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Vulnerability record · CVE-2026-79655 · published 25 August 2026

CVE-2026-79655: Link following vulnerability

A flaw was found in sos clean, a utility within the sos package. This vulnerability allows a local attacker to perform arbitrary file creation or overwrite. By crafting a malicious tar archive, an attacker can exploit a path traversal issue during tar extraction, where symlink and hardlink targets are not properly validated. This enables the attacker to write files to arbitrary locations on the system with the privileges of the sos clean process, which often runs as root.

7.8 CVSS 3.1 High EPSS 0.19% · top 92.6% CWE-59 · Link following Awaiting Analysis
7.8CVSS 3.1 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
28 Aug 2026Last modified by NVD

Description

A flaw was found in sos clean, a utility within the sos package. This vulnerability allows a local attacker to perform arbitrary file creation or overwrite. By crafting a malicious tar archive, an attacker can exploit a path traversal issue during tar extraction, where symlink and hardlink targets are not properly validated. This enables the attacker to write files to arbitrary locations on the system with the privileges of the sos clean process, which often runs as root.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

LinkTags
https://access.redhat.com/security/cve/CVE-2026-79655
https://bugzilla.redhat.com/show_bug.cgi?id=2523363
https://github.com/sosreport/sos/issues/4460
https://github.com/sosreport/sos/pull/4461
https://github.com/sosreport/sos/issues/4460

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Source: NIST National Vulnerability Database (record CVE-2026-79655), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.