CVE-2026-63948
Bluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !conn
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix chan ref leak in l2cap_chan_timeout() on !conn __set_chan_timer() takes a l2cap_chan reference via l2cap_chan_hold() before scheduling the delayed work. The normal path in l2cap_chan_timeout() drops this reference with l2cap_chan_put() at the end, but the early return when chan->conn is NULL skips the put, leaking the reference. Add the missing l2cap_chan_put() before the early return.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 19, 2026 |
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Affected Versions
Linux / Linux
06acb75e7ed600d0bbf7bff5628aa8f24a97978c < 50f1bcaaaa3a80bb1c3472044bc146e8d49d51ee e97e16433eb4533083b096a3824b93a5ca3aee79 < b5c59a5b469e2a809a2d57eda4ded94235971060 8960ff650aec70485b40771cd8e6e8c4cb467d33 < 8894c2010435a56ce7c6c2a8785860c13554df2f 955b5b6c54d95b5e7444dfc81c95c8e013f27ac0 < 63cd225cc13d782a85e2a73c04d0d350153eada1 adf0398cee86643b8eacde95f17d073d022f782c < 107c826e4ef9ec5ad8f60e6fe64d8d5325ba508f adf0398cee86643b8eacde95f17d073d022f782c < e8a5baff5be273ca07771fd2b9bb1f2a4152917b adf0398cee86643b8eacde95f17d073d022f782c < 08d81fe96f80a8e20c7acb573b6a45d901fcf2cd adf0398cee86643b8eacde95f17d073d022f782c < 9dbd84990394c51f5cee1e8871bb5ff8af5ed939 e137e2ba96e51902dc2878131823a96bf8e638ae 6466ee65e5b27161c846c73ef407f49dfa1bd1d9 eb86f955488c39526534211f2610e48a5cf8ead4 5.10.217 < 5.10.259 5.15.159 < 5.15.210 6.1.91 < 6.1.176 6.6.31 < 6.6.143 4.19.314 < 4.20 5.4.276 < 5.5 6.8.10 < 6.9
Linux / Linux
6.9
References
git.kernel.org: https://git.kernel.org/stable/c/50f1bcaaaa3a80bb1c3472044bc146e8d49d51ee git.kernel.org: https://git.kernel.org/stable/c/b5c59a5b469e2a809a2d57eda4ded94235971060 git.kernel.org: https://git.kernel.org/stable/c/8894c2010435a56ce7c6c2a8785860c13554df2f git.kernel.org: https://git.kernel.org/stable/c/63cd225cc13d782a85e2a73c04d0d350153eada1 git.kernel.org: https://git.kernel.org/stable/c/107c826e4ef9ec5ad8f60e6fe64d8d5325ba508f git.kernel.org: https://git.kernel.org/stable/c/e8a5baff5be273ca07771fd2b9bb1f2a4152917b git.kernel.org: https://git.kernel.org/stable/c/08d81fe96f80a8e20c7acb573b6a45d901fcf2cd git.kernel.org: https://git.kernel.org/stable/c/9dbd84990394c51f5cee1e8871bb5ff8af5ed939