CVSS: 5.5EPSS: 0%CPEs: 8EXPL: 0CVE-2024-27399 – Bluetooth: l2cap: fix null-ptr-deref in l2cap_chan_timeout
https://notcve.org/view.php?id=CVE-2024-27399
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: l2cap: fix null-ptr-deref in l2cap_chan_timeout There is a race condition between l2cap_chan_timeout() and l2cap_chan_del(). When we use l2cap_chan_del() to delete the channel, the chan->conn will be set to null. But the conn could be dereferenced again in the mutex_lock() of l2cap_chan_timeout(). As a result the null pointer dereference bug will happen. The KASAN report triggered by POC is shown below: [ 472.074580] ================================================================== [ 472.075284] BUG: KASAN: null-ptr-deref in mutex_lock+0x68/0xc0 [ 472.075308] Write of size 8 at addr 0000000000000158 by task kworker/0:0/7 [ 472.075308] [ 472.075308] CPU: 0 PID: 7 Comm: kworker/0:0 Not tainted 6.9.0-rc5-00356-g78c0094a146b #36 [ 472.075308] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu4 [ 472.075308] Workqueue: events l2cap_chan_timeout [ 472.075308] Call Trace: [ 472.075308] <TASK> [ 472.075308] dump_stack_lvl+0x137/0x1a0 [ 472.075308] print_report+0x101/0x250 [ 472.075308] ? __virt_addr_valid+0x77/0x160 [ 472.075308] ? • https://git.kernel.org/stable/c/3df91ea20e744344100b10ae69a17211fcf5b207 https://git.kernel.org/stable/c/e137e2ba96e51902dc2878131823a96bf8e638ae https://git.kernel.org/stable/c/6466ee65e5b27161c846c73ef407f49dfa1bd1d9 https://git.kernel.org/stable/c/06acb75e7ed600d0bbf7bff5628aa8f24a97978c https://git.kernel.org/stable/c/e97e16433eb4533083b096a3824b93a5ca3aee79 https://git.kernel.org/stable/c/8960ff650aec70485b40771cd8e6e8c4cb467d33 https://git.kernel.org/stable/c/955b5b6c54d95b5e7444dfc81c95c8e013f27ac0 https://git.kernel.org/stable/c/eb86f955488c39526534211f2610e48a5 •
CVSS: -EPSS: 0%CPEs: 11EXPL: 0CVE-2024-27398 – Bluetooth: Fix use-after-free bugs caused by sco_sock_timeout
https://notcve.org/view.php?id=CVE-2024-27398
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix use-after-free bugs caused by sco_sock_timeout When the sco connection is established and then, the sco socket is releasing, timeout_work will be scheduled to judge whether the sco disconnection is timeout. The sock will be deallocated later, but it is dereferenced again in sco_sock_timeout. As a result, the use-after-free bugs will happen. The root cause is shown below: Cleanup Thread | Worker Thread sco_sock_release | sco_sock_close | __sco_sock_close | sco_sock_set_timer | schedule_delayed_work | sco_sock_kill | (wait a time) sock_put(sk) //FREE | sco_sock_timeout | sock_hold(sk) //USE The KASAN report triggered by POC is shown below: [ 95.890016] ================================================================== [ 95.890496] BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x5e/0x1c0 [ 95.890755] Write of size 4 at addr ffff88800c388080 by task kworker/0:0/7 ... [ 95.890755] Workqueue: events sco_sock_timeout [ 95.890755] Call Trace: [ 95.890755] <TASK> [ 95.890755] dump_stack_lvl+0x45/0x110 [ 95.890755] print_address_description+0x78/0x390 [ 95.890755] print_report+0x11b/0x250 [ 95.890755] ? __virt_addr_valid+0xbe/0xf0 [ 95.890755] ? • https://git.kernel.org/stable/c/48669c81a65628ef234cbdd91b9395952c7c27fe https://git.kernel.org/stable/c/37d7ae2b0578f2373674a755402ee722e96edc08 https://git.kernel.org/stable/c/a1073aad497d0d071a71f61b721966a176d50c08 https://git.kernel.org/stable/c/ba316be1b6a00db7126ed9a39f9bee434a508043 https://git.kernel.org/stable/c/fea63ccd928c01573306983346588b26cffb5572 https://git.kernel.org/stable/c/ec1f74319bb35c1c90c25014ec0f6ea6c3ca2134 https://git.kernel.org/stable/c/b657bba82ff6a007d84fd076bd73b11131726a2b https://git.kernel.org/stable/c/1b33d55fb7355e27f8c82cd4ecd560f16 •
CVSS: -EPSS: 0%CPEs: 9EXPL: 0CVE-2024-27396 – net: gtp: Fix Use-After-Free in gtp_dellink
https://notcve.org/view.php?id=CVE-2024-27396
In the Linux kernel, the following vulnerability has been resolved: net: gtp: Fix Use-After-Free in gtp_dellink Since call_rcu, which is called in the hlist_for_each_entry_rcu traversal of gtp_dellink, is not part of the RCU read critical section, it is possible that the RCU grace period will pass during the traversal and the key will be free. To prevent this, it should be changed to hlist_for_each_entry_safe. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: gtp: corrige Use-After-Free en gtp_dellink Dado que call_rcu, que se llama en el recorrido hlist_for_each_entry_rcu de gtp_dellink, no forma parte de la sección crítica de lectura de RCU, es posible que el período de gracia de RCU pasará durante el recorrido y la clave quedará libre. Para evitar esto, se debe cambiar a hlist_for_each_entry_safe. • https://git.kernel.org/stable/c/043a283d24f40fea4c8a8d06b0e2694c8e372200 https://git.kernel.org/stable/c/c185e1d6e2752a4b656c3ca878c525fa11f55757 https://git.kernel.org/stable/c/94dc550a5062030569d4aa76e10e50c8fc001930 https://git.kernel.org/stable/c/a29c4303930bc0c25ae6a4f365dcdef71447b4ea https://git.kernel.org/stable/c/07b20d0a3dc13fb1adff10b60021a4924498da58 https://git.kernel.org/stable/c/718df1bc226c383dd803397d7f5d95557eb81ac7 https://git.kernel.org/stable/c/0caff3e6390f840666b8dc1ecebf985c2ef3f1dd https://git.kernel.org/stable/c/2e74b3fd6bf542349758f283676dff366 •
CVSS: 5.5EPSS: 0%CPEs: 8EXPL: 0CVE-2024-27395 – net: openvswitch: Fix Use-After-Free in ovs_ct_exit
https://notcve.org/view.php?id=CVE-2024-27395
In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: Fix Use-After-Free in ovs_ct_exit Since kfree_rcu, which is called in the hlist_for_each_entry_rcu traversal of ovs_ct_limit_exit, is not part of the RCU read critical section, it is possible that the RCU grace period will pass during the traversal and the key will be free. To prevent this, it should be changed to hlist_for_each_entry_safe. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: openvswitch: Fix Use-After-Free en ovs_ct_exit Dado que kfree_rcu, que se llama en el recorrido hlist_for_each_entry_rcu de ovs_ct_limit_exit, no forma parte de la sección crítica de lectura de RCU, es posible que el período de gracia de RCU pasará durante el recorrido y la clave quedará libre. Para evitar esto, se debe cambiar a hlist_for_each_entry_safe. • https://git.kernel.org/stable/c/11efd5cb04a184eea4f57b68ea63dddd463158d1 https://git.kernel.org/stable/c/2db9a8c0a01fa1c762c1e61a13c212c492752994 https://git.kernel.org/stable/c/589523cf0b384164e445dd5db8d5b1bf97982424 https://git.kernel.org/stable/c/35880c3fa6f8fe281a19975d2992644588ca33d3 https://git.kernel.org/stable/c/9048616553c65e750d43846f225843ed745ec0d4 https://git.kernel.org/stable/c/bca6fa2d9a9f560e6b89fd5190b05cc2f5d422c1 https://git.kernel.org/stable/c/eaa5e164a2110d2fb9e16c8a29e4501882235137 https://git.kernel.org/stable/c/edee0758747d7c219e29db9ed1d4eb33e •
CVSS: 8.1EPSS: 0%CPEs: 2EXPL: 0CVE-2024-27394 – tcp: Fix Use-After-Free in tcp_ao_connect_init
https://notcve.org/view.php?id=CVE-2024-27394
In the Linux kernel, the following vulnerability has been resolved: tcp: Fix Use-After-Free in tcp_ao_connect_init Since call_rcu, which is called in the hlist_for_each_entry_rcu traversal of tcp_ao_connect_init, is not part of the RCU read critical section, it is possible that the RCU grace period will pass during the traversal and the key will be free. To prevent this, it should be changed to hlist_for_each_entry_safe. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tcp: Fix Use-After-Free en tcp_ao_connect_init Dado que call_rcu, que se llama en el recorrido hlist_for_each_entry_rcu de tcp_ao_connect_init, no forma parte de la sección crítica de lectura de RCU, es posible que el El período de gracia de RCU transcurrirá durante el recorrido y la clave quedará gratuita. Para evitar esto, se debe cambiar a hlist_for_each_entry_safe. • https://git.kernel.org/stable/c/7c2ffaf21bd67f73d21560995ce17eaf5fc1d37f https://git.kernel.org/stable/c/ca4fb6c6764b3f75b4f5aa81db1536291897ff7f https://git.kernel.org/stable/c/80e679b352c3ce5158f3f778cfb77eb767e586fb • CWE-416: Use After Free •