{"api_version":"1","generated_at":"2026-07-23T21:21:04+00:00","cve":"CVE-2026-63948","urls":{"html":"https://cve.report/CVE-2026-63948","api":"https://cve.report/api/cve/CVE-2026-63948.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-63948","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63948"},"summary":{"title":"Bluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !conn","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !conn\n\n__set_chan_timer() takes a l2cap_chan reference via l2cap_chan_hold()\nbefore scheduling the delayed work.  The normal path in\nl2cap_chan_timeout() drops this reference with l2cap_chan_put() at the\nend, but the early return when chan->conn is NULL skips the put,\nleaking the reference.\n\nAdd the missing l2cap_chan_put() before the early return.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:13","updated_at":"2026-07-19 16:17:13"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/b5c59a5b469e2a809a2d57eda4ded94235971060","name":"https://git.kernel.org/stable/c/b5c59a5b469e2a809a2d57eda4ded94235971060","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e8a5baff5be273ca07771fd2b9bb1f2a4152917b","name":"https://git.kernel.org/stable/c/e8a5baff5be273ca07771fd2b9bb1f2a4152917b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8894c2010435a56ce7c6c2a8785860c13554df2f","name":"https://git.kernel.org/stable/c/8894c2010435a56ce7c6c2a8785860c13554df2f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/63cd225cc13d782a85e2a73c04d0d350153eada1","name":"https://git.kernel.org/stable/c/63cd225cc13d782a85e2a73c04d0d350153eada1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9dbd84990394c51f5cee1e8871bb5ff8af5ed939","name":"https://git.kernel.org/stable/c/9dbd84990394c51f5cee1e8871bb5ff8af5ed939","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/08d81fe96f80a8e20c7acb573b6a45d901fcf2cd","name":"https://git.kernel.org/stable/c/08d81fe96f80a8e20c7acb573b6a45d901fcf2cd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/107c826e4ef9ec5ad8f60e6fe64d8d5325ba508f","name":"https://git.kernel.org/stable/c/107c826e4ef9ec5ad8f60e6fe64d8d5325ba508f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/50f1bcaaaa3a80bb1c3472044bc146e8d49d51ee","name":"https://git.kernel.org/stable/c/50f1bcaaaa3a80bb1c3472044bc146e8d49d51ee","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63948","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63948","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 06acb75e7ed600d0bbf7bff5628aa8f24a97978c 50f1bcaaaa3a80bb1c3472044bc146e8d49d51ee git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e97e16433eb4533083b096a3824b93a5ca3aee79 b5c59a5b469e2a809a2d57eda4ded94235971060 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8960ff650aec70485b40771cd8e6e8c4cb467d33 8894c2010435a56ce7c6c2a8785860c13554df2f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 955b5b6c54d95b5e7444dfc81c95c8e013f27ac0 63cd225cc13d782a85e2a73c04d0d350153eada1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"63948","cve":"CVE-2026-63948","epss":"0.002100000","percentile":"0.113590000","score_date":"2026-07-20","updated_at":"2026-07-21 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{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !conn\n\n__set_chan_timer() takes a l2cap_chan reference via l2cap_chan_hold()\nbefore scheduling the delayed work.  The normal path in\nl2cap_chan_timeout() drops this reference with l2cap_chan_put() at the\nend, but the early return when chan->conn is NULL skips the put,\nleaking the reference.\n\nAdd the missing l2cap_chan_put() before the early return."}],"providerMetadata":{"dateUpdated":"2026-07-19T14:55:41.985Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/50f1bcaaaa3a80bb1c3472044bc146e8d49d51ee"},{"url":"https://git.kernel.org/stable/c/b5c59a5b469e2a809a2d57eda4ded94235971060"},{"url":"https://git.kernel.org/stable/c/8894c2010435a56ce7c6c2a8785860c13554df2f"},{"url":"https://git.kernel.org/stable/c/63cd225cc13d782a85e2a73c04d0d350153eada1"},{"url":"https://git.kernel.org/stable/c/107c826e4ef9ec5ad8f60e6fe64d8d5325ba508f"},{"url":"https://git.kernel.org/stable/c/e8a5baff5be273ca07771fd2b9bb1f2a4152917b"},{"url":"https://git.kernel.org/stable/c/08d81fe96f80a8e20c7acb573b6a45d901fcf2cd"},{"url":"https://git.kernel.org/stable/c/9dbd84990394c51f5cee1e8871bb5ff8af5ed939"}],"title":"Bluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !conn","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-63948","datePublished":"2026-07-19T14:55:41.985Z","dateReserved":"2026-07-19T07:54:57.023Z","dateUpdated":"2026-07-19T14:55:41.985Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:13","lastModifiedDate":"2026-07-19 16:17:13","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"63948","Ordinal":"1","Title":"Bluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !","CVE":"CVE-2026-63948","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"63948","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !conn\n\n__set_chan_timer() takes a l2cap_chan reference via l2cap_chan_hold()\nbefore scheduling the delayed work.  The normal path in\nl2cap_chan_timeout() drops this reference with l2cap_chan_put() at the\nend, but the early return when chan->conn is NULL skips the put,\nleaking the reference.\n\nAdd the missing l2cap_chan_put() before the early return.","Type":"Description","Title":"Bluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !"}]}}}