{"api_version":"1","generated_at":"2026-07-23T21:20:53+00:00","cve":"CVE-2026-63975","urls":{"html":"https://cve.report/CVE-2026-63975","api":"https://cve.report/api/cve/CVE-2026-63975.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-63975","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63975"},"summary":{"title":"Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp\n\nIf dcid is received for an already-assigned destination CID the spec\nrequires that both channels to be discarded, but calling l2cap_chan_del\nmay invalidate the tmp cursor created by list_for_each_entry_safe and\nin fact it is the wrong procedure as the chan->dcid may be assigned\npreviously it really needs to be disconnected.\n\nCalling l2cap_chan_clone directly may still lead to l2cap_chan_del so\ninstead schedule l2cap_chan_timeout with delay 0 to close the channel\nasynchronously.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:16","updated_at":"2026-07-20 15:16:59"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/291eec1041c918c460dc9702e44edd17794b4a4b","name":"https://git.kernel.org/stable/c/291eec1041c918c460dc9702e44edd17794b4a4b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ecfed1e0d8efecad6737a0d83e21d2fd021d8c48","name":"https://git.kernel.org/stable/c/ecfed1e0d8efecad6737a0d83e21d2fd021d8c48","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6319b38fe69f56ed95680ade485b957a53fff642","name":"https://git.kernel.org/stable/c/6319b38fe69f56ed95680ade485b957a53fff642","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/41e29548b5e8b5e5fcf708786b3bea67cab107fa","name":"https://git.kernel.org/stable/c/41e29548b5e8b5e5fcf708786b3bea67cab107fa","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d153b8898c0051eb8b6a083b35cbe304a5886bd5","name":"https://git.kernel.org/stable/c/d153b8898c0051eb8b6a083b35cbe304a5886bd5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/41c2713b204e6cb6a94587bc6bf6935107df5479","name":"https://git.kernel.org/stable/c/41c2713b204e6cb6a94587bc6bf6935107df5479","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e6833e737a51db1e5ea0401322acf5e22abd8be6","name":"https://git.kernel.org/stable/c/e6833e737a51db1e5ea0401322acf5e22abd8be6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3c8eaa91eb433c450426539290be4ffe282e9f00","name":"https://git.kernel.org/stable/c/3c8eaa91eb433c450426539290be4ffe282e9f00","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63975","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63975","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 15f02b91056253e8cdc592888f431da0731337b8 3c8eaa91eb433c450426539290be4ffe282e9f00 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 15f02b91056253e8cdc592888f431da0731337b8 ecfed1e0d8efecad6737a0d83e21d2fd021d8c48 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 15f02b91056253e8cdc592888f431da0731337b8 e6833e737a51db1e5ea0401322acf5e22abd8be6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 15f02b91056253e8cdc592888f431da0731337b8 6319b38fe69f56ed95680ade485b957a53fff642 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.210 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.176 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.143 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.93 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.35 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.12 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"63975","cve":"CVE-2026-63975","epss":"0.002100000","percentile":"0.113690000","score_date":"2026-07-20","updated_at":"2026-07-21 00:13:13"},"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":"3c8eaa91eb433c450426539290be4ffe282e9f00","status":"affected","version":"15f02b91056253e8cdc592888f431da0731337b8","versionType":"git"},{"lessThan":"ecfed1e0d8efecad6737a0d83e21d2fd021d8c48","status":"affected","version":"15f02b91056253e8cdc592888f431da0731337b8","versionType":"git"},{"lessThan":"e6833e737a51db1e5ea0401322acf5e22abd8be6","status":"affected","version":"15f02b91056253e8cdc592888f431da0731337b8","versionType":"git"},{"lessThan":"6319b38fe69f56ed95680ade485b957a53fff642","status":"affected","version":"15f02b91056253e8cdc592888f431da0731337b8","versionType":"git"},{"lessThan":"291eec1041c918c460dc9702e44edd17794b4a4b","status":"affected","version":"15f02b91056253e8cdc592888f431da0731337b8","versionType":"git"},{"lessThan":"41e29548b5e8b5e5fcf708786b3bea67cab107fa","status":"affected","version":"15f02b91056253e8cdc592888f431da0731337b8","versionType":"git"},{"lessThan":"d153b8898c0051eb8b6a083b35cbe304a5886bd5","status":"affected","version":"15f02b91056253e8cdc592888f431da0731337b8","versionType":"git"},{"lessThan":"41c2713b204e6cb6a94587bc6bf6935107df5479","status":"affected","version":"15f02b91056253e8cdc592888f431da0731337b8","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":"5.7"},{"lessThan":"5.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.259","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.143","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.93","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.35","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.259","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.210","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.176","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.143","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.93","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.35","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.12","versionStartIncluding":"5.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"5.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp\n\nIf dcid is received for an already-assigned destination CID the spec\nrequires that both channels to be discarded, but calling l2cap_chan_del\nmay invalidate the tmp cursor created by list_for_each_entry_safe and\nin fact it is the wrong procedure as the chan->dcid may be assigned\npreviously it really needs to be disconnected.\n\nCalling l2cap_chan_clone directly may still lead to l2cap_chan_del so\ninstead schedule l2cap_chan_timeout with delay 0 to close the channel\nasynchronously."}],"metrics":[{"cvssV3_1":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-07-20T13:41:59.074Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/3c8eaa91eb433c450426539290be4ffe282e9f00"},{"url":"https://git.kernel.org/stable/c/ecfed1e0d8efecad6737a0d83e21d2fd021d8c48"},{"url":"https://git.kernel.org/stable/c/e6833e737a51db1e5ea0401322acf5e22abd8be6"},{"url":"https://git.kernel.org/stable/c/6319b38fe69f56ed95680ade485b957a53fff642"},{"url":"https://git.kernel.org/stable/c/291eec1041c918c460dc9702e44edd17794b4a4b"},{"url":"https://git.kernel.org/stable/c/41e29548b5e8b5e5fcf708786b3bea67cab107fa"},{"url":"https://git.kernel.org/stable/c/d153b8898c0051eb8b6a083b35cbe304a5886bd5"},{"url":"https://git.kernel.org/stable/c/41c2713b204e6cb6a94587bc6bf6935107df5479"}],"title":"Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-63975","datePublished":"2026-07-19T14:56:00.662Z","dateReserved":"2026-07-19T07:54:57.024Z","dateUpdated":"2026-07-20T13:41:59.074Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:16","lastModifiedDate":"2026-07-20 15:16:59","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"63975","Ordinal":"1","Title":"Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp","CVE":"CVE-2026-63975","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"63975","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp\n\nIf dcid is received for an already-assigned destination CID the spec\nrequires that both channels to be discarded, but calling l2cap_chan_del\nmay invalidate the tmp cursor created by list_for_each_entry_safe and\nin fact it is the wrong procedure as the chan->dcid may be assigned\npreviously it really needs to be disconnected.\n\nCalling l2cap_chan_clone directly may still lead to l2cap_chan_del so\ninstead schedule l2cap_chan_timeout with delay 0 to close the channel\nasynchronously.","Type":"Description","Title":"Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp"}]}}}