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CVE-2026-8784— npitre cramfs-tools cramfsck.c change_file_status symlink

CVSS 4.2 · Medium EPSS 0.16% · P5

Possible ATT&CK Techniques 1AI

T1552.005 · Cloud Instance Metadata API

Affected Version Matrix 3

VendorProductVersion RangeStatus
npitrecramfs-tools2.0affected
2.1affected
2.2affected
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I. Basic Information for CVE-2026-8784

Vulnerability Information
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Vulnerability Title
npitre cramfs-tools cramfsck.c change_file_status symlink
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability was detected in npitre cramfs-tools up to 2.2. Affected is the function change_file_status of the file cramfsck.c. Performing a manipulation results in symlink following. The attack requires a local approach. The exploit is now public and may be used. The patch is named b4a3a695c9873f824907bd15659f2a6ac7667b4f. It is recommended to apply a patch to fix this issue.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-61
Source: NVD (National Vulnerability Database)
Vulnerability Title
cramfs-tools 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
cramfs-tools是Nicolas Pitre个人开发者的一个压缩只读文件系统工具。 cramfs-tools 2.2及之前版本存在后置链接漏洞，该漏洞源于文件cramfsck.c中函数change_file_status的操作导致符号链接跟随，可能允许本地攻击。
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

VendorProductAffected VersionsCPESubscribe
npitrecramfs-tools 2.0 cpe:2.3:a:npitre:cramfs-tools:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-8784

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III. Intelligence Information for CVE-2026-8784

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Patches & Fixes for CVE-2026-8784 (1)

Proof of Concept for CVE-2026-8784 (2)

Other References for CVE-2026-8784 (1)

IV. Related Vulnerabilities

Same product: cramfs-tools
Same vendor: npitre
Same weakness: CWE-61

V. Comments for CVE-2026-8784

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