npitre cramfs-tools up to 2.2 cramfsck.c change_file_status symlink

CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in npitre cramfs-tools up to 2.2. Affected by this vulnerability is the function change_file_status of the file cramfsck.c. Executing a manipulation can lead to symlink. This vulnerability appears as CVE-2026-8784. The attack requires local access. In addition, an exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in npitre cramfs-tools up to 2.2. It has been declared as problematic. This vulnerability affects the function change_file_status of the file cramfsck.c. The manipulation with an unknown input leads to a symlink vulnerability. The CWE definition for the vulnerability is CWE-61. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-8784. The exploitation appears to be easy. The attack needs to be approached locally. Additional levels of successful authentication are necessary for exploitation. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

Applying the patch b4a3a695c9873f824907bd15659f2a6ac7667b4f is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-30728). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.2
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.2
VulDB Temp Score: 3.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Symlink
CWE: CWE-61 / CWE-59
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: b4a3a695c9873f824907bd15659f2a6ac7667b4f

Timelineinfo

05/17/2026 Advisory disclosed
05/17/2026 +0 days VulDB entry created
05/18/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 13
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2026-8784 (🔒)
GCVE (CVE): GCVE-0-2026-8784
GCVE (VulDB): GCVE-100-364408
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/17/2026 12:04
Updated: 05/18/2026 16:44
Changes: 05/17/2026 12:04 (60), 05/18/2026 16:44 (1)
Complete: 🔍
Submitter: nich0las
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #811897: GNU cramfs-tools below v2.2 Symlink Following (by nich0las)

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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