Vulnerability-Lookup

CVE-2021-29256 (GCVE-0-2021-29256)

Vulnerability from cvelistv5 – Published: 2021-05-24 17:56 – Updated: 2025-10-21 23:25

CISA Previdian

Summary

. 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.

Severity

8.8 (High)


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

SSVC

Exploitation: active Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-04 19:43 UTC

CWE

n/a
CWE-416 - Use After Free

Assigner

mitre CNA under the mitre root

CNA scorecard E 29/100 over 2132 records in the last 180 days details

References

2 references

URL	Tags
https://developer.arm.com/support/arm-security-up…	x_refsource_CONFIRM
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

CISA

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: 9a30e9ca-de9d-4a11-a5bd-85f31674b88e

Vulnerability ID: CVE-2021-29256

Status: Confirmed

Status Updated: 2023-07-07 00:00 UTC

Exploited: Yes

Timestamps

First Seen: 2023-07-07

Asserted: 2023-07-07

Scope

Notes: Arm Mali GPU Kernel Driver Use-After-Free Vulnerability | Affected: Arm / Mali Graphics Processing Unit (GPU) | Description: Arm Mali GPU Kernel Driver contains a use-after-free vulnerability that may allow a non-privileged user to gain root privilege and/or disclose information. | Required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable. | Due date: 2023-07-28 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://developer.arm.com/Arm%20Security%20Center/Mali%20GPU%20Driver%20Vulnerabilities; https://nvd.nist.gov/vuln/detail/CVE-2021-29256

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details

Cwes	CWE-416
Feed	CISA Known Exploited Vulnerabilities Catalog
Product	Mali Graphics Processing Unit (GPU)
Due Date	2023-07-28
Date Added	2023-07-07
Vendorproject	Arm
Vulnerabilityname	Arm Mali GPU Kernel Driver Use-After-Free Vulnerability
Knownransomwarecampaignuse	Unknown

References

CVE-2021-29256

Created: 2026-02-02 12:26 UTC | Updated: 2026-11-04 13:35 UTC

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: 2b101ac4-2f50-4bc0-94c2-fb66c2a4a2e0

Vulnerability ID: CVE-2021-29256

Status: Confirmed

Status Updated: 2023-07-07 00:00 UTC

Exploited: Yes

Timestamps

First Seen: 2023-07-07

Asserted: 2023-07-07

Scope

Notes: KEVIntel entry: . The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory, leading to information disclosure or root privilege... | Affected: Arm / Mali GPU kernel driver | CVSS: 8.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: False

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details

Feed	KEVIntel (kevintel.com)
Title	. The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory, leading to information disclosure or root privilege...
Vendor	Arm
Product	Mali GPU kernel driver
Added Date	2023-07-07T00:00:00.000Z
Cvss Score	8.8
Epss Score	None
Cvss Severity	HIGH
Epss Percentile	None
Used In Malware	unknown
Ahead Of Cisa Kev	None
Not Yet In Cisa Kev	False

References

Created: 2026-06-23 14:05 UTC | Updated: 2026-07-10 06:14 UTC

Show details on NVD website

JSON

To clipboard

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      "product_status:known_affected": "0",
      "product_status:known_not_affected": "668",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-29256",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2023/cve-2021-29256.json",
      "version": "21"
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    "vulnrichment": {
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CERTFR-2023-AVI-0516

Vulnerability from certfr_avis - Published: - Updated:

De multiples vulnérabilités ont été découvertes dans Google Android et Google Pixel. Certaines d'entre elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur, une exécution de code arbitraire à distance et un déni de service.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

	Vendor	Product	Description
	Google	Android	Google Pixel sans le correctif du 5 juillet 2023
	Google	Android	Google Android 11, 12, 12L, 13 sans le correctif du 5 juillet 2023

References

Title

Publication Time

CERTFR-2023-AVI-0516

Vulnerability from certfr_avis - Published: - Updated:

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

	Vendor	Product	Description
	Google	Android	Google Pixel sans le correctif du 5 juillet 2023
	Google	Android	Google Android 11, 12, 12L, 13 sans le correctif du 5 juillet 2023

References

Title

Publication Time

FKIE_CVE-2021-29256

Vulnerability from fkie_nvd - Published: 2021-05-24 18:15 - Updated: 2026-06-17 03:47

CISA Previdian

Severity

8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

URL	Tags
cve@mitre.org	https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver	Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-29256	US Government Resource

Impacted products

Vendor	Product	Version
arm	bifrost_gpu_kernel_driver	*
arm	midgard_gpu_kernel_driver	*
arm	valhall_gpu_kernel_driver	*

JSON

To clipboard

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          "vendor": "n/a",
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  "cisaActionDue": "2023-07-28",
  "cisaExploitAdd": "2023-07-07",
  "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",
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}

GHSA-GM4Q-9JX5-3GFV

Vulnerability from github – Published: 2022-05-24 19:03 – Updated: 2025-10-22 00:32

Details

Severity

8.8 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-29256"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-05-24T18:15:00Z",
    "severity": "HIGH"
  },
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  "id": "GHSA-gm4q-9jx5-3gfv",
  "modified": "2025-10-22T00:32:13Z",
  "published": "2022-05-24T19:03:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29256"
    },
    {
      "type": "WEB",
      "url": "https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver"
    },
    {
      "type": "WEB",
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      "type": "CVSS_V3"
    }
  ]
}

GSD-2021-29256

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

Aliases

CVE-2021-29256

Aliases

CVE-2021-29256

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-29256",
    "description": ". 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.",
    "id": "GSD-2021-29256",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-29256.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
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        "CVE-2021-29256"
      ],
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      "id": "GSD-2021-29256",
      "modified": "2023-12-13T01:23:36.420789Z",
      "schema_version": "1.4.0"
    }
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          "reference_data": [
            {
              "name": "https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver",
              "refsource": "CONFIRM",
              "tags": [
                "Vendor Advisory"
              ],
              "url": "https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 9.0,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 8.0,
          "impactScore": 10.0,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2022-03-22T15:00Z",
      "publishedDate": "2021-05-24T18:15Z"
    }
  }
}

WID-SEC-W-2023-1669

Vulnerability from csaf_certbund - Published: 2023-07-05 22:00 - Updated: 2023-09-06 22:00

Summary

Android Patchday Juli 2023

Severity

Hoch

Scope

121 vulnerabilities in this advisory, including CVE-2021-29256.

CVE-2021-29256

In Google Android existieren mehrere Schwachstellen. Diese bestehen in den Komponenten "Kernel", "Kernel-Komponenten", "ARM-Komponenten", "Imagination Technologies", "MediaTek Komponenten", "Pixel", "Qualcomm-Komponenten" sowie "Qualcomm Closed-Source-Komponenten". Ein entfernter, anonymer Angreifer kann diese Schwachstellen ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen, seine Privilegien zu erweitern, Informationen offenzulegen oder einen Denial of Service Zustand herbeizuführen. Für die Ausnutzung einiger dieser Schwachstellen ist eine Benutzerinteraktion erforderlich.

Known affected: 6 products

Open the full advisory

WID-SEC-W-2023-1981

Vulnerability from csaf_certbund - Published: 2023-08-07 22:00 - Updated: 2023-08-07 22:00

Summary

Samsung Android: Mehrere Schwachstellen

Severity

Hoch

Scope

81 vulnerabilities in this advisory, including CVE-2021-29256.

CVE-2021-29256

Es bestehen mehrere Schwachstellen in Samsung Android. Diese Fehler existieren in den Komponenten WifiGeofenceManager, SemWifiApTimeOutImpl, libsimba, TelephonyUI, libsec-ril, AuthenticationConfig, Telecom, SLocationService, VaultKeeper in HAL, MMIGroup, HDCP trustlet. Ein Angreifer kann diese Schwachstellen ausnutzen, um beliebigen Code auszuführen, vertrauliche Informationen preiszugeben, einen 'Denial of Service'-Zustand zu verursachen, seine Privilegien zu erweitern oder Dateien zu manipulieren. Für die Ausnutzung einiger dieser Schwachstellen ist eine Benutzerinteraktion erforderlich.

Last affected: 1 product

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2021-29256 (GCVE-0-2021-29256)

CISA

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Vendor Report Successful Exploitation Confidence: 80% Source: cisa-kev

Details

References

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Public Report Successful Exploitation Confidence: 70% Source: kevintel

Details

References

CERTFR-2023-AVI-0516

Solution

CERTFR-2023-AVI-0516

Solution

FKIE_CVE-2021-29256

GHSA-GM4Q-9JX5-3GFV

GSD-2021-29256

WID-SEC-W-2023-1669

WID-SEC-W-2023-1981

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour