CVE-2026-47328 (GCVE-0-2026-47328)

Vulnerability from cvelistv5 – Published: 2026-05-28 18:27 – Updated: 2026-05-28 19:25
VLAI
Title
Invalid pointer deallocation in Ubuntu Linux AppArmor notification handling
Summary
Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly attempt to free a pointer which was not previously kmalloc()d, while at the same time leaking allocated memory. The bug can be triggered by an unprivileged local user and can result in the corruption of slab metadata and could lead to resource exhaustion.
Severity
6.1 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-590 - Free of memory not on the heap
Assigner
References
Impacted products
Vendor Product Version
Canonical Ubuntu Linux Affected: 6.8.0 , < 6.8.0-124.124 (dpkg)
Affected: 6.17.0 , < 6.17.0-35.35 (dpkg)
Affected: 7.0.0 , < 7.0.0-22.22 (dpkg)
Create a notification for this product.
Credits
Tristan Madani (@TristanInSec), Talence Security
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-47328",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-28T19:20:06.494860Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-28T19:25:13.160Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://launchpad.net/ubuntu/+source/",
          "defaultStatus": "unaffected",
          "modules": [
            "AppArmor"
          ],
          "packageName": "linux",
          "product": "Ubuntu Linux",
          "repo": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/",
          "vendor": "Canonical",
          "versions": [
            {
              "lessThan": "6.8.0-124.124",
              "status": "affected",
              "version": "6.8.0",
              "versionType": "dpkg"
            },
            {
              "lessThan": "6.17.0-35.35",
              "status": "affected",
              "version": "6.17.0",
              "versionType": "dpkg"
            },
            {
              "lessThan": "7.0.0-22.22",
              "status": "affected",
              "version": "7.0.0",
              "versionType": "dpkg"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Tristan Madani (@TristanInSec), Talence Security"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly attempt to free a pointer which was not previously kmalloc()d, while at the same time leaking allocated memory. The bug can be triggered by an unprivileged local user and can result in the corruption of slab metadata and could lead to resource exhaustion."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-590",
              "description": "CWE-590 Free of memory not on the heap",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-28T18:27:33.181Z",
        "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "shortName": "canonical"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=7f3c4902c39432ce7ea0d384cb70eba282247fac"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Invalid pointer deallocation in Ubuntu Linux AppArmor notification handling"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "cveId": "CVE-2026-47328",
    "datePublished": "2026-05-28T18:27:33.181Z",
    "dateReserved": "2026-05-19T10:37:36.433Z",
    "dateUpdated": "2026-05-28T19:25:13.160Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-47328",
      "date": "2026-07-03",
      "epss": "0.00093",
      "percentile": "0.0073"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-47328\",\"sourceIdentifier\":\"security@ubuntu.com\",\"published\":\"2026-05-28T19:16:40.687\",\"lastModified\":\"2026-06-17T10:54:31.043\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly attempt to free a pointer which was not previously kmalloc()d, while at the same time leaking allocated memory. The bug can be triggered by an unprivileged local user and can result in the corruption of slab metadata and could lead to resource exhaustion.\"}],\"affected\":[{\"source\":\"security@ubuntu.com\",\"affectedData\":[{\"vendor\":\"Canonical\",\"product\":\"Ubuntu Linux\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://launchpad.net/ubuntu/+source/\",\"packageName\":\"linux\",\"modules\":[\"AppArmor\"],\"repo\":\"https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/\",\"versions\":[{\"version\":\"6.8.0\",\"lessThan\":\"6.8.0-124.124\",\"versionType\":\"dpkg\",\"status\":\"affected\"},{\"version\":\"6.17.0\",\"lessThan\":\"6.17.0-35.35\",\"versionType\":\"dpkg\",\"status\":\"affected\"},{\"version\":\"7.0.0\",\"lessThan\":\"7.0.0-22.22\",\"versionType\":\"dpkg\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@ubuntu.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H\",\"baseScore\":6.1,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":4.2}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-05-28T19:20:06.494860Z\",\"id\":\"CVE-2026-47328\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security@ubuntu.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-590\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:24.04:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"62D1BEC7-1A71-4991-A1A5-0E3D282100EC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:25.10:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"68D562DD-F22D-4310-93C7-7DE817104CAC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:26.04:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2BB2642A-AA54-4949-A9FC-0E9673539350\"}]}]}],\"references\":[{\"url\":\"https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=7f3c4902c39432ce7ea0d384cb70eba282247fac\",\"source\":\"security@ubuntu.com\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-47328\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-28T19:20:06.494860Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-28T19:25:08.685Z\"}}], \"cna\": {\"title\": \"Invalid pointer deallocation in Ubuntu Linux AppArmor notification handling\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Tristan Madani (@TristanInSec), Talence Security\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 6.1, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/\", \"vendor\": \"Canonical\", \"modules\": [\"AppArmor\"], \"product\": \"Ubuntu Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.8.0\", \"lessThan\": \"6.8.0-124.124\", \"versionType\": \"dpkg\"}, {\"status\": \"affected\", \"version\": \"6.17.0\", \"lessThan\": \"6.17.0-35.35\", \"versionType\": \"dpkg\"}, {\"status\": \"affected\", \"version\": \"7.0.0\", \"lessThan\": \"7.0.0-22.22\", \"versionType\": \"dpkg\"}], \"packageName\": \"linux\", \"collectionURL\": \"https://launchpad.net/ubuntu/+source/\", \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=7f3c4902c39432ce7ea0d384cb70eba282247fac\", \"tags\": [\"patch\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly attempt to free a pointer which was not previously kmalloc()d, while at the same time leaking allocated memory. The bug can be triggered by an unprivileged local user and can result in the corruption of slab metadata and could lead to resource exhaustion.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-590\", \"description\": \"CWE-590 Free of memory not on the heap\"}]}], \"providerMetadata\": {\"orgId\": \"cc1ad9ee-3454-478d-9317-d3e869d708bc\", \"shortName\": \"canonical\", \"dateUpdated\": \"2026-05-28T18:27:33.181Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-47328\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-28T19:25:13.160Z\", \"dateReserved\": \"2026-05-19T10:37:36.433Z\", \"assignerOrgId\": \"cc1ad9ee-3454-478d-9317-d3e869d708bc\", \"datePublished\": \"2026-05-28T18:27:33.181Z\", \"assignerShortName\": \"canonical\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.