CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се от съседна мрежа, без особени условия, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix UAF in l2cap_le_connect_rsp l2cap_le_connect_rsp() obtains a channel via __l2cap_get_chan_by_ident() but neither holds a reference nor uses l2cap_chan_hold_unless_zero() before locking and operating on it. A concurrent l2cap_chan_del() triggered by a remote disconnect can free the channel between the lookup and l2cap_chan_lock(), causing a use-after-free. The BR/EDR counterpart l2cap_connect_rsp() and the sibling handler l2cap_le_command_rej() already use l2cap_chan_hold_unless_zero() to safely hold a reference, but l2cap_le_connect_rsp() was left unprotected. Fix by adding l2cap_chan_hold_unless_zero() after the ident lookup and l2cap_chan_put() on the exit path, consistent with other L2CAP response handlers.
Засегнати продукти
- Linux Linux: f1496dee9cbde2a62821f4441dadb0d3360f60c3 преди 15d6c2367217a6a20b1abae9f38ded716bf620f1; f1496dee9cbde2a62821f4441dadb0d3360f60c3 преди 1818180fe12d6cec7a437bc59cde8efdf6b10250; f1496dee9cbde2a62821f4441dadb0d3360f60c3 преди 8325eafb38c3dee5af329266393763693d17381b; f1496dee9cbde2a62821f4441dadb0d3360f60c3 преди fd4c1e301bdec60a40728ea37de531cbccda501a; f1496dee9cbde2a62821f4441dadb0d3360f60c3 преди 522b730c62c53a1981604fd73524697fd347830d; f1496dee9cbde2a62821f4441dadb0d3360f60c3 преди 58e3c5289ad230a7e24ae4b0c7b43f5ee6e32136; f1496dee9cbde2a62821f4441dadb0d3360f60c3 преди 09f447accc2570751e7d17f0dc0788b40d3edade; f1496dee9cbde2a62821f4441dadb0d3360f60c3 преди c4740e7f23ff9a8210198d8b4703259e21b9f69d
- Linux Linux: 3.14; преди 3.14; 5.10.265 до 5.10.*; 5.15.216 до 5.15.*; 6.1.183 до 6.1.*; 6.6.151 до 6.6.*; 6.12.103 до 6.12.*; 6.18.44 до 6.18.*; 7.1.8 до 7.1.*; от 7.2 нататък
История
- 15 август 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-74540
- https://nvd.nist.gov/vuln/detail/CVE-2026-74540
- https://git.kernel.org/stable/c/15d6c2367217a6a20b1abae9f38ded716bf620f1
- https://git.kernel.org/stable/c/1818180fe12d6cec7a437bc59cde8efdf6b10250
- https://git.kernel.org/stable/c/8325eafb38c3dee5af329266393763693d17381b
- https://git.kernel.org/stable/c/fd4c1e301bdec60a40728ea37de531cbccda501a
- https://git.kernel.org/stable/c/522b730c62c53a1981604fd73524697fd347830d
- https://git.kernel.org/stable/c/58e3c5289ad230a7e24ae4b0c7b43f5ee6e32136
- https://git.kernel.org/stable/c/09f447accc2570751e7d17f0dc0788b40d3edade
- https://git.kernel.org/stable/c/c4740e7f23ff9a8210198d8b4703259e21b9f69d