{"api_version":"1","generated_at":"2026-05-03T12:42:07+00:00","cve":"CVE-2026-43019","urls":{"html":"https://cve.report/CVE-2026-43019","api":"https://cve.report/api/cve/CVE-2026-43019.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43019","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43019"},"summary":{"title":"Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: fix potential UAF in set_cig_params_sync\n\nhci_conn lookup and field access must be covered by hdev lock in\nset_cig_params_sync, otherwise it's possible it is freed concurrently.\n\nTake hdev lock to prevent hci_conn from being deleted or modified\nconcurrently.  Just RCU lock is not suitable here, as we also want to\navoid \"tearing\" in the configuration.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-01 15:16:46","updated_at":"2026-05-03 07:16:22"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/a2639a7f0f5bf7d73f337f8f077c19415c62ed2c","name":"https://git.kernel.org/stable/c/a2639a7f0f5bf7d73f337f8f077c19415c62ed2c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/66d432e9b45bae7881ffcdb12cd8fd0bf254ef02","name":"https://git.kernel.org/stable/c/66d432e9b45bae7881ffcdb12cd8fd0bf254ef02","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bad65b4b0a96139f023eadc28a33125963208449","name":"https://git.kernel.org/stable/c/bad65b4b0a96139f023eadc28a33125963208449","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7d568fede8eac91161a60b710aa920abe9b0fb9f","name":"https://git.kernel.org/stable/c/7d568fede8eac91161a60b710aa920abe9b0fb9f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43019","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43019","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a091289218202bc09d9b9caa8afcde1018584aec 66d432e9b45bae7881ffcdb12cd8fd0bf254ef02 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a091289218202bc09d9b9caa8afcde1018584aec 7d568fede8eac91161a60b710aa920abe9b0fb9f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a091289218202bc09d9b9caa8afcde1018584aec bad65b4b0a96139f023eadc28a33125963208449 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a091289218202bc09d9b9caa8afcde1018584aec a2639a7f0f5bf7d73f337f8f077c19415c62ed2c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a273cd0f47dd672d37736e623849374f9ab9ce9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d8570c4c3f2a3e51b3c8b5e6ec898364c5c03062 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.81 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.22 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.12 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"43019","cve":"CVE-2026-43019","epss":"0.000180000","percentile":"0.046600000","score_date":"2026-05-02","updated_at":"2026-05-03 00:00:23"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/bluetooth/hci_conn.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"66d432e9b45bae7881ffcdb12cd8fd0bf254ef02","status":"affected","version":"a091289218202bc09d9b9caa8afcde1018584aec","versionType":"git"},{"lessThan":"7d568fede8eac91161a60b710aa920abe9b0fb9f","status":"affected","version":"a091289218202bc09d9b9caa8afcde1018584aec","versionType":"git"},{"lessThan":"bad65b4b0a96139f023eadc28a33125963208449","status":"affected","version":"a091289218202bc09d9b9caa8afcde1018584aec","versionType":"git"},{"lessThan":"a2639a7f0f5bf7d73f337f8f077c19415c62ed2c","status":"affected","version":"a091289218202bc09d9b9caa8afcde1018584aec","versionType":"git"},{"status":"affected","version":"3a273cd0f47dd672d37736e623849374f9ab9ce9","versionType":"git"},{"status":"affected","version":"d8570c4c3f2a3e51b3c8b5e6ec898364c5c03062","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/bluetooth/hci_conn.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.6"},{"lessThan":"6.6","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.81","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.22","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.81","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.22","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.12","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: fix potential UAF in set_cig_params_sync\n\nhci_conn lookup and field access must be covered by hdev lock in\nset_cig_params_sync, otherwise it's possible it is freed concurrently.\n\nTake hdev lock to prevent hci_conn from being deleted or modified\nconcurrently.  Just RCU lock is not suitable here, as we also want to\navoid \"tearing\" in the configuration."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-05-03T05:46:06.840Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/66d432e9b45bae7881ffcdb12cd8fd0bf254ef02"},{"url":"https://git.kernel.org/stable/c/7d568fede8eac91161a60b710aa920abe9b0fb9f"},{"url":"https://git.kernel.org/stable/c/bad65b4b0a96139f023eadc28a33125963208449"},{"url":"https://git.kernel.org/stable/c/a2639a7f0f5bf7d73f337f8f077c19415c62ed2c"}],"title":"Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43019","datePublished":"2026-05-01T14:15:23.035Z","dateReserved":"2026-05-01T14:12:55.975Z","dateUpdated":"2026-05-03T05:46:06.840Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-01 15:16:46","lastModifiedDate":"2026-05-03 07:16:22","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43019","Ordinal":"1","Title":"Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync","CVE":"CVE-2026-43019","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43019","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: fix potential UAF in set_cig_params_sync\n\nhci_conn lookup and field access must be covered by hdev lock in\nset_cig_params_sync, otherwise it's possible it is freed concurrently.\n\nTake hdev lock to prevent hci_conn from being deleted or modified\nconcurrently.  Just RCU lock is not suitable here, as we also want to\navoid \"tearing\" in the configuration.","Type":"Description","Title":"Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync"}]}}}