Vulnerability-Lookup

GHSA-6JMV-JJW5-5RWP

Vulnerability from github – Published: 2026-05-01 15:30 – Updated: 2026-05-03 09:33

Details

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

Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt

hci_conn lookup and field access must be covered by hdev lock in hci_le_remote_conn_param_req_evt, otherwise it's possible it is freed concurrently.

Extend the hci_dev_lock critical section to cover all conn usage.

Severity ?

8.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43018"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-01T15:16:45Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt\n\nhci_conn lookup and field access must be covered by hdev lock in\nhci_le_remote_conn_param_req_evt, otherwise it\u0027s possible it is freed\nconcurrently.\n\nExtend the hci_dev_lock critical section to cover all conn usage.",
  "id": "GHSA-6jmv-jjw5-5rwp",
  "modified": "2026-05-03T09:33:10Z",
  "published": "2026-05-01T15:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43018"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d0bdbfe3e91c11f0a704c52443a9446a10d699c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/59eecf0ffde15670e6a5e10c47be67f73d843b20"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5fb69e1eeea9d6cba80517e9f058b56b34bc3a81"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7cadb03be37e761130edb153544fe0770a842b19"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b255531b27da336571411248c2a72a350662bd09"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ea3cd36d7382d5f8309df04c275d20df139ed42c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-43018 (GCVE-0-2026-43018)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:15 – Updated: 2026-05-03 05:46

Title

Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt hci_conn lookup and field access must be covered by hdev lock in hci_le_remote_conn_param_req_evt, otherwise it's possible it is freed concurrently. Extend the hci_dev_lock critical section to cover all conn usage.

Severity ?

8.8 (High)


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

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/59eecf0ffde15670e…
	https://git.kernel.org/stable/c/5fb69e1eeea9d6cba…
	https://git.kernel.org/stable/c/7cadb03be37e76113…
	https://git.kernel.org/stable/c/1d0bdbfe3e91c11f0…
	https://git.kernel.org/stable/c/ea3cd36d7382d5f83…
	https://git.kernel.org/stable/c/b255531b27da33657…

Impacted products

Vendor

Product

Version

Linux

Affected: 95118dd4edfec950898a00180c6f998df0a6406d , < 59eecf0ffde15670e6a5e10c47be67f73d843b20 (git)
Affected: 95118dd4edfec950898a00180c6f998df0a6406d , < 5fb69e1eeea9d6cba80517e9f058b56b34bc3a81 (git)
Affected: 95118dd4edfec950898a00180c6f998df0a6406d , < 7cadb03be37e761130edb153544fe0770a842b19 (git)
Affected: 95118dd4edfec950898a00180c6f998df0a6406d , < 1d0bdbfe3e91c11f0a704c52443a9446a10d699c (git)
Affected: 95118dd4edfec950898a00180c6f998df0a6406d , < ea3cd36d7382d5f8309df04c275d20df139ed42c (git)
Affected: 95118dd4edfec950898a00180c6f998df0a6406d , < b255531b27da336571411248c2a72a350662bd09 (git)

Linux

Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.134 , ≤ 6.6.* (semver)
Unaffected: 6.12.81 , ≤ 6.12.* (semver)
Unaffected: 6.18.22 , ≤ 6.18.* (semver)
Unaffected: 6.19.12 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_event.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
            }
          ]
        },
        {
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              "version": "0",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.12.81",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.18.*",
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            },
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              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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              "operator": "OR"
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        }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-03T05:46:05.696Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/59eecf0ffde15670e6a5e10c47be67f73d843b20"
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        {
          "url": "https://git.kernel.org/stable/c/5fb69e1eeea9d6cba80517e9f058b56b34bc3a81"
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        },
        {
          "url": "https://git.kernel.org/stable/c/b255531b27da336571411248c2a72a350662bd09"
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      ],
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    "datePublished": "2026-05-01T14:15:22.308Z",
    "dateReserved": "2026-05-01T14:12:55.975Z",
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    "state": "PUBLISHED"
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}

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.

Action not permitted

GHSA-6JMV-JJW5-5RWP

CVE-2026-43018 (GCVE-0-2026-43018)

Tags

Sightings

Nomenclature