CVE-2021-29256

. The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory, leading to information disclosure or root privilege escalation. This affects Bifrost r16p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r28p0 through r30p0.

CVSS v3 8.8 HIGH
CVSS v2.0 9.0 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:S/C:C/I:C/A:C

Exploitability : 8.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:arm:bifrost::::::::
	cpe:2.3:a:arm:midgard::::::::
	cpe:2.3:a:arm:valhall::::::::

History

22 Mar 2022, 15:00

Type	Values Removed	Values Added
CPE	cpe:2.3:a:arm:midguard::::::::	cpe:2.3:a:arm:midgard::::::::
First Time		Arm midgard

08 Jun 2021, 17:08

Type	Values Removed	Values Added
CPE		cpe:2.3:a:arm:midguard:::::::: cpe:2.3:a:arm:bifrost:::::::: cpe:2.3:a:arm:valhall::::::::
CWE		CWE-416
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : 9.0 v3 : 8.8
References	~~(CONFIRM) https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver -~~	(CONFIRM) https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver - Vendor Advisory

24 May 2021, 18:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2021-05-24 18:15

Updated : 2023-12-10 13:55

NVD link : CVE-2021-29256

Mitre link : CVE-2021-29256

CVE.ORG link : CVE-2021-29256

JSON object : View

Products Affected

arm

valhall
bifrost
midgard

CWE

CWE-416

Use After Free

{"id": "CVE-2021-29256", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 9.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C", "authentication": "SINGLE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": false, "impactScore": 10.0, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 8.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "published": "2021-05-24T18:15:08.033", "references": [{"url": "https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": ". The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory, leading to information disclosure or root privilege escalation. This affects Bifrost r16p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r28p0 through r30p0."}, {"lang": "es", "value": "El controlador del kernel de la GPU Arm Mali, permite a un usuario no privilegiado acceder a la memoria liberada, conllevando a una divulgaci\u00f3n de informaci\u00f3n o una escalada de privilegios de root. Esto afecta a Bifrost versiones r16p0 hasta r29p0 anteriores a r30p0, Valhall r19p0 hasta r29p0 anteriores a r30p0 y Midgard versiones r28p0 hasta r30p0"}], "lastModified": "2022-03-22T15:00:44.740", "cisaActionDue": "2023-07-28", "cisaExploitAdd": "2023-07-07", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:arm:bifrost:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EB7B47A9-86B1-46B5-8F83-6409B6CD895C", "versionEndExcluding": "r30p0-01eac0", "versionStartIncluding": "r16p0-01eac0"}, {"criteria": "cpe:2.3:a:arm:midgard:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BB4EF1AF-F341-439F-A5BF-A4424D0E2F14", "versionEndIncluding": "r30p0-01eac0", "versionStartIncluding": "r28p0-01eac0"}, {"criteria": "cpe:2.3:a:arm:valhall:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "31B6A9F2-3304-429C-9339-6C16A5834521", "versionEndExcluding": "r30p0-01eac0", "versionStartIncluding": "r19p0-01eac0"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org", "cisaRequiredAction": "Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.", "cisaVulnerabilityName": "Arm Mali GPU Kernel Driver Use-After-Free Vulnerability"}