CVE-2026-8784

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.

CVSS v3 4.2 MEDIUM
CVSS v2.0 4.0 MEDIUM

4.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.8 / Impact : 3.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

4.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:L/Au:M/C:P/I:P/A:P

Exploitability : 2.5 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication MULTIPLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/npitre/cramfs-tools/
https://github.com/npitre/cramfs-tools/commit/b4a3a695c9873f824907bd15659f2a6ac7667b4f
https://github.com/npitre/cramfs-tools/issues/13
https://github.com/npitre/cramfs-tools/issues/13#issuecomment-4306102583
https://vuldb.com/submit/811897
https://vuldb.com/vuln/364408
https://vuldb.com/vuln/364408/cti

Configurations

No configuration.

History

25 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) Se detectó una vulnerabilidad en npitre cramfs-tools hasta 2.2. La función change_file_status del archivo cramfsck.c está afectada. Realizar una manipulación resulta en seguimiento de enlaces simbólicos. El ataque requiere un enfoque local. El exploit ahora es público y puede ser utilizado. El parche se llama b4a3a695c9873f824907bd15659f2a6ac7667b4f. Se recomienda aplicar un parche para solucionar este problema.

Information

Published : 2026-05-18 04:16

Updated : 2026-10-25 23:10

NVD link : CVE-2026-8784

Mitre link : CVE-2026-8784

CVE.ORG link : CVE-2026-8784

JSON object : View

Products Affected

No product.

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

CWE-61

UNIX Symbolic Link (Symlink) Following

{"id": "CVE-2026-8784", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-8784", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-18T12:24:11.194480Z"}}], "cvssMetricV2": [{"type": "Secondary", "source": "cna@vuldb.com", "cvssData": {"version": "2.0", "baseScore": 4.0, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:M/C:P/I:P/A:P", "authentication": "MULTIPLE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 2.5, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Secondary", "source": "cna@vuldb.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.2, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "impactScore": 3.4, "exploitabilityScore": 0.8}], "cvssMetricV40": [{"type": "Secondary", "source": "cna@vuldb.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 1.8, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "LOW", "valueDensity": "NOT_DEFINED", "vectorString": "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", "exploitMaturity": "PROOF_OF_CONCEPT", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "cna@vuldb.com", "affectedData": [{"cpes": ["cpe:2.3:a:npitre:cramfs-tools:*:*:*:*:*:*:*:*"], "vendor": "npitre", "product": "cramfs-tools", "versions": [{"status": "affected", "version": "2.0"}, {"status": "affected", "version": "2.1"}, {"status": "affected", "version": "2.2"}]}]}], "published": "2026-05-18T04:16:34.247", "references": [{"url": "https://github.com/npitre/cramfs-tools/", "source": "cna@vuldb.com"}, {"url": "https://github.com/npitre/cramfs-tools/commit/b4a3a695c9873f824907bd15659f2a6ac7667b4f", "source": "cna@vuldb.com"}, {"url": "https://github.com/npitre/cramfs-tools/issues/13", "source": "cna@vuldb.com"}, {"url": "https://github.com/npitre/cramfs-tools/issues/13#issuecomment-4306102583", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/submit/811897", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/vuln/364408", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/vuln/364408/cti", "source": "cna@vuldb.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "cna@vuldb.com", "description": [{"lang": "en", "value": "CWE-59"}, {"lang": "en", "value": "CWE-61"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Se detect\u00f3 una vulnerabilidad en npitre cramfs-tools hasta 2.2. La funci\u00f3n change_file_status del archivo cramfsck.c est\u00e1 afectada. Realizar una manipulaci\u00f3n resulta en seguimiento de enlaces simb\u00f3licos. El ataque requiere un enfoque local. El exploit ahora es p\u00fablico y puede ser utilizado. El parche se llama b4a3a695c9873f824907bd15659f2a6ac7667b4f. Se recomienda aplicar un parche para solucionar este problema."}], "lastModified": "2026-10-25T23:10:00.167", "sourceIdentifier": "cna@vuldb.com"}