npitre cramfs-tools cramfsck.c change_file_status symlink

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Summary

CVECVE-2026-8784
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-18 04:16:34 UTC
Updated2026-05-18 19:22:47 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v4.0 1.8 LOW from [email protected]

CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.000210000 probability, percentile 0.061810000 (date 2026-05-26)

Problem Types: CWE-59 | CWE-61 | CWE-61 Symlink Following | CWE-59 Link Following

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary1.8LOWCVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/C...
4.0CNADECLARED4.6MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
3.1[email protected]Primary4.2MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
3.1CNADECLARED4.2MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
3.0CNADECLARED4.2MEDIUMCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
2.0[email protected]Secondary4AV:L/AC:L/Au:M/C:P/I:P/A:P
2.0CNADECLARED4AV:L/AC:L/Au:M/C:P/I:P/A:P/E:POC/RL:OF/RC:C

CVSS v4.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
None
Privileges Required
High
User Interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

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

CVSS v3.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Npitre Cramfs-tools affected 2.0 Not specified
CNA Npitre Cramfs-tools affected 2.1 Not specified
CNA Npitre Cramfs-tools affected 2.2 Not specified

References

ReferenceSourceLinkTags
vuldb.com/vuln/364408/cti [email protected] vuldb.com
vuldb.com/submit/811897 [email protected] vuldb.com
github.com/npitre/cramfs-tools [email protected] github.com
vuldb.com/vuln/364408 [email protected] vuldb.com
github.com/npitre/cramfs-tools/issues/13 [email protected] github.com
github.com/npitre/cramfs-tools/issues/13 [email protected] github.com
github.com/npitre/cramfs-tools/commit/b4a3a695c9873f824907bd15659f2a6ac7... [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: nich0las (VulDB User) (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-17T00:00:00.000ZAdvisory disclosed
CNA2026-05-17T02:00:00.000ZVulDB entry created
CNA2026-05-17T12:04:24.000ZVulDB entry last update

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