Vulnerability-Lookup

GHSA-VGX9-CPQ5-RX9P

Vulnerability from github – Published: 2026-03-25 15:31 – Updated: 2026-03-25 15:31

Details

cryptodev-linux version 1.14 and prior contain a page reference handling flaw in the get_userbuf function of the /dev/crypto device driver that allows local users to trigger use-after-free conditions. Attackers with access to the /dev/crypto interface can repeatedly decrement reference counts of controlled pages to achieve local privilege escalation.

Severity ?

8.5 (High)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-28529"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-25T14:16:33Z",
    "severity": "HIGH"
  },
  "details": "cryptodev-linux version 1.14 and prior contain a page reference handling flaw in the get_userbuf function of the /dev/crypto device driver that allows local users to trigger use-after-free conditions. Attackers with access to the /dev/crypto interface can repeatedly decrement reference counts of controlled pages to achieve local privilege escalation.",
  "id": "GHSA-vgx9-cpq5-rx9p",
  "modified": "2026-03-25T15:31:29Z",
  "published": "2026-03-25T15:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28529"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cryptodev-linux/cryptodev-linux/pull/104"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/n4sm/0fd2479e0c23e0fa2f192cd8fda45750"
    },
    {
      "type": "WEB",
      "url": "https://nasm.re/posts/cryptodev-linux-vuln"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/cryptodev-linux-get-userbuf-use-after-free-lpe"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-28529 (GCVE-0-2026-28529)

Vulnerability from cvelistv5 – Published: 2026-03-25 13:00 – Updated: 2026-03-25 13:48 X_Open Source

Title

cryptodev-linux <= 1.14 get_userbuf Use After Free LPE

Summary

Severity ?

8.5 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CWE

CWE-416 - Use After Free (CWE-416)

Assigner

VulnCheck

References

URL

Tags

	https://nasm.re/posts/cryptodev-linux-vuln/	technical-descriptionexploit
	https://gist.github.com/n4sm/0fd2479e0c23e0fa2f19…	exploit
	https://github.com/cryptodev-linux/cryptodev-linu…	patch
	https://www.vulncheck.com/advisories/cryptodev-li…	third-party-advisory

Impacted products

	Vendor	Product	Version
	cryptodev-linux	cryptodev-linux	Affected: 0 , ≤ 1.14 (semver)

Credits

nasm

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-28529",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-25T13:47:38.970778Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-25T13:48:53.136Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "cryptodev-linux",
          "repo": "https://github.com/cryptodev-linux/cryptodev-linux",
          "vendor": "cryptodev-linux",
          "versions": [
            {
              "lessThanOrEqual": "1.14",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "nasm"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "cryptodev-linux version 1.14 and prior contain a page reference handling flaw in the get_userbuf function of the /dev/crypto device driver that allows local users to trigger use-after-free conditions. Attackers with access to the /dev/crypto interface can repeatedly decrement reference counts of controlled pages to achieve local privilege escalation."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "Use After Free (CWE-416)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-25T13:00:58.783Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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      "references": [
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          "url": "https://nasm.re/posts/cryptodev-linux-vuln/"
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        {
          "tags": [
            "exploit"
          ],
          "url": "https://gist.github.com/n4sm/0fd2479e0c23e0fa2f192cd8fda45750"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/cryptodev-linux/cryptodev-linux/pull/104"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/cryptodev-linux-get-userbuf-use-after-free-lpe"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "tags": [
        "x_open-source"
      ],
      "title": "cryptodev-linux \u003c= 1.14 get_userbuf Use After Free LPE",
      "x_generator": {
        "engine": "Vulnogram 0.5.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-28529",
    "datePublished": "2026-03-25T13:00:58.783Z",
    "dateReserved": "2026-02-27T21:07:55.468Z",
    "dateUpdated": "2026-03-25T13:48:53.136Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-VGX9-CPQ5-RX9P

CVE-2026-28529 (GCVE-0-2026-28529)

Tags

Sightings

Nomenclature