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GHSA-Q648-4769-6M83

Vulnerability from github – Published: 2026-04-22 15:31 – Updated: 2026-05-17 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: MGMT: Fix dangling pointer on mgmt_add_adv_patterns_monitor_complete

This fixes the condition checking so mgmt_pending_valid is executed whenever status != -ECANCELED otherwise calling mgmt_pending_free(cmd) would kfree(cmd) without unlinking it from the list first, leaving a dangling pointer. Any subsequent list traversal (e.g., mgmt_pending_foreach during __mgmt_power_off, or another mgmt_pending_valid call) would dereference freed memory.

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31511"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-22T14:16:50Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: Fix dangling pointer on mgmt_add_adv_patterns_monitor_complete\n\nThis fixes the condition checking so mgmt_pending_valid is executed\nwhenever status != -ECANCELED otherwise calling mgmt_pending_free(cmd)\nwould kfree(cmd) without unlinking it from the list first, leaving a\ndangling pointer. Any subsequent list traversal (e.g.,\nmgmt_pending_foreach during __mgmt_power_off, or another\nmgmt_pending_valid call) would dereference freed memory.",
  "id": "GHSA-q648-4769-6m83",
  "modified": "2026-05-17T18:30:26Z",
  "published": "2026-04-22T15:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31511"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2074dfffad76981ca451cb7fc98703d04ac562fe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/340666172cf747de58c283d2eef1f335f050538b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3a89c33deffb3cb7877a7ea2e50734cd12b064f2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f5fa4cd35f707344f65ce9e225b6528691dbbaa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bafec9325d4de26b6c49db75b5d5172de652aae0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-31511 (GCVE-0-2026-31511)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:54 – Updated: 2026-08-05 12:23

Title

Bluetooth: MGMT: Fix dangling pointer on mgmt_add_adv_patterns_monitor_complete

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix dangling pointer on mgmt_add_adv_patterns_monitor_complete This fixes the condition checking so mgmt_pending_valid is executed whenever status != -ECANCELED otherwise calling mgmt_pending_free(cmd) would kfree(cmd) without unlinking it from the list first, leaving a dangling pointer. Any subsequent list traversal (e.g., mgmt_pending_foreach during __mgmt_power_off, or another mgmt_pending_valid call) would dereference freed memory.

Severity

7.8 (High)


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

Assigner

Linux mitre root

References

5 references

URL	Tags
https://git.kernel.org/stable/c/2074dfffad76981ca…
https://git.kernel.org/stable/c/340666172cf747de5…
https://git.kernel.org/stable/c/bafec9325d4de26b6…
https://git.kernel.org/stable/c/3a89c33deffb3cb78…
https://git.kernel.org/stable/c/5f5fa4cd35f707344…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0b60eb04b8524e1b4b3f07fea0d16fda9a677d9a , < 2074dfffad76981ca451cb7fc98703d04ac562fe (git) Affected: d71b98f253b079cbadc83266383f26fe7e9e103b , < 340666172cf747de58c283d2eef1f335f050538b (git) Affected: 302a1f674c00dd5581ab8e493ef44767c5101aab , < bafec9325d4de26b6c49db75b5d5172de652aae0 (git) Affected: 302a1f674c00dd5581ab8e493ef44767c5101aab , < 3a89c33deffb3cb7877a7ea2e50734cd12b064f2 (git) Affected: 302a1f674c00dd5581ab8e493ef44767c5101aab , < 5f5fa4cd35f707344f65ce9e225b6528691dbbaa (git) Affected: 87a1f16f07c6c43771754075e08f45b41d237421 (git) Affected: 6.12.59 , < 6.12.80 (semver) Affected: 6.16.10 , < 6.17 (semver)
Linux	Linux	Affected: 6.17 Unaffected: 0 , < 6.17 (semver) Unaffected: 6.12.80 , ≤ 6.12.* (semver) Unaffected: 6.18.21 , ≤ 6.18.* (semver) Unaffected: 6.19.11 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/mgmt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2074dfffad76981ca451cb7fc98703d04ac562fe",
              "status": "affected",
              "version": "0b60eb04b8524e1b4b3f07fea0d16fda9a677d9a",
              "versionType": "git"
            },
            {
              "lessThan": "340666172cf747de58c283d2eef1f335f050538b",
              "status": "affected",
              "version": "d71b98f253b079cbadc83266383f26fe7e9e103b",
              "versionType": "git"
            },
            {
              "lessThan": "bafec9325d4de26b6c49db75b5d5172de652aae0",
              "status": "affected",
              "version": "302a1f674c00dd5581ab8e493ef44767c5101aab",
              "versionType": "git"
            },
            {
              "lessThan": "3a89c33deffb3cb7877a7ea2e50734cd12b064f2",
              "status": "affected",
              "version": "302a1f674c00dd5581ab8e493ef44767c5101aab",
              "versionType": "git"
            },
            {
              "lessThan": "5f5fa4cd35f707344f65ce9e225b6528691dbbaa",
              "status": "affected",
              "version": "302a1f674c00dd5581ab8e493ef44767c5101aab",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "87a1f16f07c6c43771754075e08f45b41d237421",
              "versionType": "git"
            },
            {
              "lessThan": "6.12.80",
              "status": "affected",
              "version": "6.12.59",
              "versionType": "semver"
            },
            {
              "lessThan": "6.17",
              "status": "affected",
              "version": "6.16.10",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/mgmt.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.80",
                  "versionStartIncluding": "6.12.59",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.21",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.11",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.16.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: Fix dangling pointer on mgmt_add_adv_patterns_monitor_complete\n\nThis fixes the condition checking so mgmt_pending_valid is executed\nwhenever status != -ECANCELED otherwise calling mgmt_pending_free(cmd)\nwould kfree(cmd) without unlinking it from the list first, leaving a\ndangling pointer. Any subsequent list traversal (e.g.,\nmgmt_pending_foreach during __mgmt_power_off, or another\nmgmt_pending_valid call) would dereference freed memory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable path is reached by a local process sending `MGMT_OP_ADD_ADV_PATTERNS_MONITOR` or `_RSSI` over a `PF_BLUETOOTH` HCI management/control socket. Remote Bluetooth peers do not issue MGMT commands into this path.\nAC:L - The bug occurs on normal non-canceled completion: the command is freed without being unlinked, and the attacker can trigger later list traversal with another MGMT command or device power/index removal. No uncontrollable race is required.\nPR:L - The affected handlers are not marked untrusted, so the socket must be trusted via `CAP_NET_ADMIN`. Because the checks use namespace-scoped capability checks and can be satisfied by an unprivileged local user through user namespaces in plausible deployments, this is Low rather than High.\nUI:N - After obtaining the required local privileges, the attacker can send the MGMT command and trigger the follow-up traversal directly. No victim action is required.\nS:U - The vulnerability corrupts kernel Bluetooth/MGMT state within the same kernel security authority. This is standard local kernel memory corruption, not a VM, IOMMU, or cross-authority boundary escape for CVSS scope.\nC:H - This is a use-after-free of `struct mgmt_pending_cmd` left on a kernel list, and freed slab contents can be reclaimed or read during later traversal. Under the required conservative kernel guidance, UAFs are scored as high confidentiality impact.\nI:H - The dangling list entry can lead to attacker-influenced use of freed kernel memory and list operations/callback dereferences, which is defensibly exploitable beyond a crash. Under the required conservative kernel guidance, UAF memory corruption is high integrity impact.\nA:H - Subsequent traversal of the freed pending command can dereference freed memory and cause a kernel oops/panic, as similar MGMT UAF fixes show. The attacker can trigger this repeatedly once the vulnerable state is created."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:23:11.297Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2074dfffad76981ca451cb7fc98703d04ac562fe"
        },
        {
          "url": "https://git.kernel.org/stable/c/340666172cf747de58c283d2eef1f335f050538b"
        },
        {
          "url": "https://git.kernel.org/stable/c/bafec9325d4de26b6c49db75b5d5172de652aae0"
        },
        {
          "url": "https://git.kernel.org/stable/c/3a89c33deffb3cb7877a7ea2e50734cd12b064f2"
        },
        {
          "url": "https://git.kernel.org/stable/c/5f5fa4cd35f707344f65ce9e225b6528691dbbaa"
        }
      ],
      "title": "Bluetooth: MGMT: Fix dangling pointer on mgmt_add_adv_patterns_monitor_complete",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31511",
    "datePublished": "2026-04-22T13:54:29.420Z",
    "dateReserved": "2026-03-09T15:48:24.106Z",
    "dateUpdated": "2026-08-05T12:23:11.297Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.
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GHSA-Q648-4769-6M83

CVE-2026-31511 (GCVE-0-2026-31511)

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