Vulnerability-Lookup

FKIE_CVE-2026-31408

Vulnerability from fkie_nvd - Published: 2026-04-06 08:16 - Updated: 2026-05-20 16:18

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold sco_recv_frame() reads conn->sk under sco_conn_lock() but immediately releases the lock without holding a reference to the socket. A concurrent close() can free the socket between the lock release and the subsequent sk->sk_state access, resulting in a use-after-free. Other functions in the same file (sco_sock_timeout(), sco_conn_del()) correctly use sco_sock_hold() to safely hold a reference under the lock. Fix by using sco_sock_hold() to take a reference before releasing the lock, and adding sock_put() on all exit paths.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/108b81514d8f2535eb16651495cefb2250528db3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/45aaca995e4a7a05b272a58e7ab2fff4f611b8f1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/598dbba9919c5e36c54fe1709b557d64120cb94b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7197462e90b8ce15caa1ae15d4bc2bb8cd21b11e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b0a7da0e3f7442545f071499beb36374714bb9de	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d57384e27d1ebf0047e3f00a6e1181b8be9857a2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e76e8f0581ef555eacc11dbb095e602fb30a5361	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
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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    }
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  "id": "CVE-2026-31408",
  "lastModified": "2026-05-20T16:18:27.093",
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          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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          "value": "CWE-416"
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      "source": "nvd@nist.gov",
      "type": "Primary"
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}

CVE-2026-31408 (GCVE-0-2026-31408)

Vulnerability from cvelistv5 – Published: 2026-04-06 07:38 – Updated: 2026-05-11 22:08

Title

Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold

Summary

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

7 references

URL	Tags
https://git.kernel.org/stable/c/d57384e27d1ebf004…
https://git.kernel.org/stable/c/b0a7da0e3f7442545…
https://git.kernel.org/stable/c/45aaca995e4a7a05b…
https://git.kernel.org/stable/c/108b81514d8f2535e…
https://git.kernel.org/stable/c/7197462e90b8ce15c…
https://git.kernel.org/stable/c/e76e8f0581ef555ea…
https://git.kernel.org/stable/c/598dbba9919c5e36c…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d57384e27d1ebf0047e3f00a6e1181b8be9857a2 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b0a7da0e3f7442545f071499beb36374714bb9de (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 45aaca995e4a7a05b272a58e7ab2fff4f611b8f1 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 108b81514d8f2535eb16651495cefb2250528db3 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7197462e90b8ce15caa1ae15d4bc2bb8cd21b11e (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e76e8f0581ef555eacc11dbb095e602fb30a5361 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 598dbba9919c5e36c54fe1709b557d64120cb94b (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.168 , ≤ 6.1.* (semver) Unaffected: 6.6.131 , ≤ 6.6.* (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)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/sco.c"
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          "vendor": "Linux",
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      "title": "Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    "datePublished": "2026-04-06T07:38:20.533Z",
    "dateReserved": "2026-03-09T15:48:24.086Z",
    "dateUpdated": "2026-05-11T22:08:07.990Z",
    "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.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-31408

CVE-2026-31408 (GCVE-0-2026-31408)

Tags

Sightings

Nomenclature