Vulnerability-Lookup

FKIE_CVE-2026-31499

Vulnerability from fkie_nvd - Published: 2026-04-22 14:16 - Updated: 2026-05-14 15:16

Severity ?

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

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix deadlock in l2cap_conn_del() l2cap_conn_del() calls cancel_delayed_work_sync() for both info_timer and id_addr_timer while holding conn->lock. However, the work functions l2cap_info_timeout() and l2cap_conn_update_id_addr() both acquire conn->lock, creating a potential AB-BA deadlock if the work is already executing when l2cap_conn_del() takes the lock. Move the work cancellations before acquiring conn->lock and use disable_delayed_work_sync() to additionally prevent the works from being rearmed after cancellation, consistent with the pattern used in hci_conn_del().

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/00fdebbbc557a2fc21321ff2eaa22fd70c078608	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3f26ecbd9cde621dd94be7ef252c7210b965a5c7	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d008460de352e534f6721de829b093368564ec66	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f7f35a4f7fd574f5889bb2e4b397e14cbb83f6da

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.14
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix deadlock in l2cap_conn_del()\n\nl2cap_conn_del() calls cancel_delayed_work_sync() for both info_timer\nand id_addr_timer while holding conn-\u003elock. However, the work functions\nl2cap_info_timeout() and l2cap_conn_update_id_addr() both acquire\nconn-\u003elock, creating a potential AB-BA deadlock if the work is already\nexecuting when l2cap_conn_del() takes the lock.\n\nMove the work cancellations before acquiring conn-\u003elock and use\ndisable_delayed_work_sync() to additionally prevent the works from\nbeing rearmed after cancellation, consistent with the pattern used in\nhci_conn_del()."
    }
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  "id": "CVE-2026-31499",
  "lastModified": "2026-05-14T15:16:45.357",
  "metrics": {
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
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  "vulnStatus": "Modified",
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          "lang": "en",
          "value": "CWE-667"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-31499 (GCVE-0-2026-31499)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:54 – Updated: 2026-05-23 16:05

Title

Bluetooth: L2CAP: Fix deadlock in l2cap_conn_del()

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/f7f35a4f7fd574f58…
https://git.kernel.org/stable/c/3f26ecbd9cde621dd…
https://git.kernel.org/stable/c/d008460de352e534f…
https://git.kernel.org/stable/c/00fdebbbc557a2fc2…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f87271d21dd4ee83857ca11b94e7b4952749bbae , < f7f35a4f7fd574f5889bb2e4b397e14cbb83f6da (git) Affected: ab4eedb790cae44313759b50fe47da285e2519d5 , < 3f26ecbd9cde621dd94be7ef252c7210b965a5c7 (git) Affected: ab4eedb790cae44313759b50fe47da285e2519d5 , < d008460de352e534f6721de829b093368564ec66 (git) Affected: ab4eedb790cae44313759b50fe47da285e2519d5 , < 00fdebbbc557a2fc21321ff2eaa22fd70c078608 (git) Affected: efc30877bd4bc85fefe98d80af60fafc86e5775e (git) Affected: 18ab6b6078fa8191ca30a3065d57bf35d5635761 (git) Affected: 6.12.20 , < 6.12.88 (semver) Affected: 6.6.84 , < 6.7 (semver) Affected: 6.13.8 , < 6.14 (semver)
Linux	Linux	Affected: 6.14 Unaffected: 0 , < 6.14 (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.21 , ≤ 6.18.* (semver) Unaffected: 6.19.11 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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          "programFiles": [
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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

FKIE_CVE-2026-31499

CVE-2026-31499 (GCVE-0-2026-31499)

Tags

Sightings

Nomenclature