{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63948", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.023Z", "datePublished": "2026-07-19T14:55:41.985Z", "dateUpdated": "2026-07-19T14:55:41.985Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T14:55:41.985Z"}, "descriptions": [{"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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/l2cap_core.c"], "versions": [{"version": "06acb75e7ed600d0bbf7bff5628aa8f24a97978c", "lessThan": "50f1bcaaaa3a80bb1c3472044bc146e8d49d51ee", "status": "affected", "versionType": "git"}, {"version": "e97e16433eb4533083b096a3824b93a5ca3aee79", "lessThan": "b5c59a5b469e2a809a2d57eda4ded94235971060", "status": "affected", "versionType": "git"}, {"version": "8960ff650aec70485b40771cd8e6e8c4cb467d33", "lessThan": "8894c2010435a56ce7c6c2a8785860c13554df2f", "status": "affected", "versionType": "git"}, {"version": "955b5b6c54d95b5e7444dfc81c95c8e013f27ac0", "lessThan": "63cd225cc13d782a85e2a73c04d0d350153eada1", "status": "affected", "versionType": "git"}, {"version": "adf0398cee86643b8eacde95f17d073d022f782c", "lessThan": "107c826e4ef9ec5ad8f60e6fe64d8d5325ba508f", "status": "affected", "versionType": "git"}, {"version": "adf0398cee86643b8eacde95f17d073d022f782c", "lessThan": "e8a5baff5be273ca07771fd2b9bb1f2a4152917b", "status": "affected", "versionType": "git"}, {"version": "adf0398cee86643b8eacde95f17d073d022f782c", "lessThan": "08d81fe96f80a8e20c7acb573b6a45d901fcf2cd", "status": "affected", "versionType": "git"}, {"version": "adf0398cee86643b8eacde95f17d073d022f782c", "lessThan": "9dbd84990394c51f5cee1e8871bb5ff8af5ed939", "status": "affected", "versionType": "git"}, {"version": "e137e2ba96e51902dc2878131823a96bf8e638ae", "status": "affected", "versionType": "git"}, {"version": "6466ee65e5b27161c846c73ef407f49dfa1bd1d9", "status": "affected", "versionType": "git"}, {"version": "eb86f955488c39526534211f2610e48a5cf8ead4", "status": "affected", "versionType": "git"}, {"version": "5.10.217", "lessThan": "5.10.259", "status": "affected", "versionType": "semver"}, {"version": "5.15.159", "lessThan": "5.15.210", "status": "affected", "versionType": "semver"}, {"version": "6.1.91", "lessThan": "6.1.176", "status": "affected", "versionType": "semver"}, {"version": "6.6.31", "lessThan": "6.6.143", "status": "affected", "versionType": "semver"}, {"version": "4.19.314", "lessThan": "4.20", "status": "affected", "versionType": "semver"}, {"version": "5.4.276", "lessThan": "5.5", "status": "affected", "versionType": "semver"}, {"version": "6.8.10", "lessThan": "6.9", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/l2cap_core.c"], "versions": [{"version": "6.9", "status": "affected"}, {"version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.217", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.159", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.91", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.31", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.314"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.276"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8.10"}]}]}], "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"}}}}

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