{"api_version":"1","generated_at":"2026-04-23T01:53:28+00:00","cve":"CVE-2026-31499","urls":{"html":"https://cve.report/CVE-2026-31499","api":"https://cve.report/api/cve/CVE-2026-31499.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31499","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31499"},"summary":{"title":"Bluetooth: L2CAP: Fix deadlock in l2cap_conn_del()","description":"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->lock. However, the work functions\nl2cap_info_timeout() and l2cap_conn_update_id_addr() both acquire\nconn->lock, 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->lock 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().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-22 14:16:48","updated_at":"2026-04-22 14:16:48"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/00fdebbbc557a2fc21321ff2eaa22fd70c078608","name":"https://git.kernel.org/stable/c/00fdebbbc557a2fc21321ff2eaa22fd70c078608","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3f26ecbd9cde621dd94be7ef252c7210b965a5c7","name":"https://git.kernel.org/stable/c/3f26ecbd9cde621dd94be7ef252c7210b965a5c7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d008460de352e534f6721de829b093368564ec66","name":"https://git.kernel.org/stable/c/d008460de352e534f6721de829b093368564ec66","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31499","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31499","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ab4eedb790cae44313759b50fe47da285e2519d5 3f26ecbd9cde621dd94be7ef252c7210b965a5c7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ab4eedb790cae44313759b50fe47da285e2519d5 d008460de352e534f6721de829b093368564ec66 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ab4eedb790cae44313759b50fe47da285e2519d5 00fdebbbc557a2fc21321ff2eaa22fd70c078608 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected efc30877bd4bc85fefe98d80af60fafc86e5775e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f87271d21dd4ee83857ca11b94e7b4952749bbae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 18ab6b6078fa8191ca30a3065d57bf35d5635761 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.14","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.21 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.11 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":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/bluetooth/l2cap_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3f26ecbd9cde621dd94be7ef252c7210b965a5c7","status":"affected","version":"ab4eedb790cae44313759b50fe47da285e2519d5","versionType":"git"},{"lessThan":"d008460de352e534f6721de829b093368564ec66","status":"affected","version":"ab4eedb790cae44313759b50fe47da285e2519d5","versionType":"git"},{"lessThan":"00fdebbbc557a2fc21321ff2eaa22fd70c078608","status":"affected","version":"ab4eedb790cae44313759b50fe47da285e2519d5","versionType":"git"},{"status":"affected","version":"efc30877bd4bc85fefe98d80af60fafc86e5775e","versionType":"git"},{"status":"affected","version":"f87271d21dd4ee83857ca11b94e7b4952749bbae","versionType":"git"},{"status":"affected","version":"18ab6b6078fa8191ca30a3065d57bf35d5635761","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/bluetooth/l2cap_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.14"},{"lessThan":"6.14","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.21","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.11","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":"6.18.21","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.11","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.84","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.20","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","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->lock. However, the work functions\nl2cap_info_timeout() and l2cap_conn_update_id_addr() both acquire\nconn->lock, 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->lock 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()."}],"providerMetadata":{"dateUpdated":"2026-04-22T13:54:20.384Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/3f26ecbd9cde621dd94be7ef252c7210b965a5c7"},{"url":"https://git.kernel.org/stable/c/d008460de352e534f6721de829b093368564ec66"},{"url":"https://git.kernel.org/stable/c/00fdebbbc557a2fc21321ff2eaa22fd70c078608"}],"title":"Bluetooth: L2CAP: Fix deadlock in l2cap_conn_del()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31499","datePublished":"2026-04-22T13:54:20.384Z","dateReserved":"2026-03-09T15:48:24.104Z","dateUpdated":"2026-04-22T13:54:20.384Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-22 14:16:48","lastModifiedDate":"2026-04-22 14:16:48","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31499","Ordinal":"1","Title":"Bluetooth: L2CAP: Fix deadlock in l2cap_conn_del()","CVE":"CVE-2026-31499","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31499","Ordinal":"1","NoteData":"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->lock. However, the work functions\nl2cap_info_timeout() and l2cap_conn_update_id_addr() both acquire\nconn->lock, 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->lock 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().","Type":"Description","Title":"Bluetooth: L2CAP: Fix deadlock in l2cap_conn_del()"}]}}}