CVE-2026-43019 (GCVE-0-2026-43019)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:15 – Updated: 2026-05-03 05:46
VLAI?
Title
Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync hci_conn lookup and field access must be covered by hdev lock in set_cig_params_sync, otherwise it's possible it is freed concurrently. Take hdev lock to prevent hci_conn from being deleted or modified concurrently. Just RCU lock is not suitable here, as we also want to avoid "tearing" in the configuration.
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a091289218202bc09d9b9caa8afcde1018584aec , < 66d432e9b45bae7881ffcdb12cd8fd0bf254ef02 (git)
Affected: a091289218202bc09d9b9caa8afcde1018584aec , < 7d568fede8eac91161a60b710aa920abe9b0fb9f (git)
Affected: a091289218202bc09d9b9caa8afcde1018584aec , < bad65b4b0a96139f023eadc28a33125963208449 (git)
Affected: a091289218202bc09d9b9caa8afcde1018584aec , < a2639a7f0f5bf7d73f337f8f077c19415c62ed2c (git)
Affected: 3a273cd0f47dd672d37736e623849374f9ab9ce9 (git)
Affected: d8570c4c3f2a3e51b3c8b5e6ec898364c5c03062 (git)
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    Linux Linux Affected: 6.6
Unaffected: 0 , < 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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}


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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.

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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.
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  • 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.



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