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CVE-2026-79655— Sos: sos: path traversal in sos clean tar extraction via unvalidated symlink/hardlink targets leads to arbitrary file write

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

sosreport SoS是sosreport组织开源的一款系统诊断信息收集工具。 sosreport SoS存在后置链接漏洞，该漏洞源于sos clean在tar解压过程中存在路径遍历问题，符号链接和硬链接目标未正确验证，导致本地攻击者可通过特制恶意tar归档文件以sos clean进程权限（通常为root）在系统任意位置创建或覆盖文件。

CVSS 7.8 · High EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1222.001 · Windows Permissions

Affected Version Matrix 5

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 6 any unknown
Red Hat Red Hat Enterprise Linux 7 any unaffected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
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I. Basic Information for CVE-2026-79655

Vulnerability Information
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Vulnerability Title
Sos: sos: path traversal in sos clean tar extraction via unvalidated symlink/hardlink targets leads to arbitrary file write
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
sosreport SoS 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
sosreport SoS是sosreport组织开源的一款系统诊断信息收集工具。 sosreport SoS存在后置链接漏洞，该漏洞源于sos clean在tar解压过程中存在路径遍历问题，符号链接和硬链接目标未正确验证，导致本地攻击者可通过特制恶意tar归档文件以sos clean进程权限（通常为root）在系统任意位置创建或覆盖文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-79655

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: arbitrary file write via unvalidated symlink in sos clean tar extraction: /pwned.txt contains PROOF_4c1e3c534a898378
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 11404 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-79655

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Patches & Fixes for CVE-2026-79655 (1)

Vendor Advisories for CVE-2026-79655 (3)

Same Patch Batch · Red Hat · 2026-08-25 · 9 CVEs total

CVE-2026-79992 7.8 HIGH Emacs: emacs: command injection via crafted filenames in tramp
CVE-2026-80186 7.6 HIGH Bluez: stack overflow in name2utf8 causes dos and potential code execution
CVE-2026-78322 6.5 MEDIUM File-roller: file-roller: stack buffer overflow in parse_progress_line for 7z and rar hand
CVE-2026-78701 6.5 MEDIUM 389-ds-base: 389-ds-base: cve-2026-11610 incomplete fix may introduce a connection-stall d
CVE-2026-79717 6.4 MEDIUM Galaxy_ng: galaxy_ng: blind ssrf via namespace avatar_url with no private-address restrict
CVE-2026-79652 5.9 MEDIUM Keycloak-services: keycloak-services: jwt bearer authorization grant does not enforce cons
CVE-2026-80185 5.7 MEDIUM Bluez: sdp-xml: bluez 5.86: unprivileged-local and adjacent-le-peer leads to arbitrary cod
CVE-2026-77680 5.3 MEDIUM Libsoup3: libsoup: quadratic cpu denial of service in http range coalescing after cve-2025

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-59

V. Comments for CVE-2026-79655

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