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

Vulnerability from cvelistv5 – Published: 2026-04-06 07:38 – Updated: 2026-05-11 22:08
VLAI
Title
Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold
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.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted 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)
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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)
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  }
}


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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.