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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.

在 sos 软件包中的 sos clean 工具中发现了一个缺陷。该漏洞允许本地攻击者实现任意文件的创建或覆盖。攻击者可以通过构造恶意的 tar 归档文件，在 tar 解压缩过程中利用路径遍历问题，而系统中并未对符号链接（symlink）和硬链接（hardlink）的目标路径进行正确验证。这使得攻击者能够以 sos clean 进程的运行权限（该进程通常以 root 权限运行）在系统上的任意位置写入文件。

CVSS 7.8 · High

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 affected
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

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
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Qwen3.6-35B-A3B · 11404 chars
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III. Intelligence Information for CVE-2026-79655

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

Vendor Advisories for CVE-2026-79655 (2)

Other References for CVE-2026-79655 (1)

Same Patch Batch · Red Hat · 2026-08-25 · 10 CVEs total

CVE-2026-79992 7.8 HIGH Emacs: local shell command injection through the user field in emacs tramp
CVE-2026-80186 7.6 HIGH Bluez: stack overflow in name2utf8 causes dos and potential code execution
CVE-2026-78701 6.5 MEDIUM 389-ds-base: 389-ds-base: cve-2026-11610 incomplete fix may introduce a connection-stall d
CVE-2026-78322 6.5 MEDIUM File-roller: file-roller: stack buffer overflow in parse_progress_line for 7z and rar hand
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
CVE-2026-80101 4.4 MEDIUM Gimp: multiple heap out-of-bounds reads in xwd loader from unrelated width and bytes-per-l

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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