CVSS: 9.1EPSS: 0%CPEs: 4EXPL: 0CVE-2021-47348 – drm/amd/display: Avoid HDCP over-read and corruption
https://notcve.org/view.php?id=CVE-2021-47348
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Avoid HDCP over-read and corruption Instead of reading the desired 5 bytes of the actual target field, the code was reading 8. This could result in a corrupted value if the trailing 3 bytes were non-zero, so instead use an appropriately sized and zero-initialized bounce buffer, and read only 5 bytes before casting to u64. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: drm/amd/display: evita la sobrelectura y la corrupción de HDCP. En lugar de leer los 5 bytes deseados del campo de destino real, el código leía 8. Esto podría resultar en un archivo dañado. valor si los 3 bytes finales fueran distintos de cero, por lo tanto, utilice un búfer de rebote de tamaño adecuado e inicializado en cero, y lea solo 5 bytes antes de convertir a u64. • https://git.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2e https://git.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639f https://git.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172f https://git.kernel.org/stable/c/06888d571b513cbfc0b41949948def6cb81021b2 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •
CVSS: 8.8EPSS: 0%CPEs: 9EXPL: 0CVE-2021-47347 – wl1251: Fix possible buffer overflow in wl1251_cmd_scan
https://notcve.org/view.php?id=CVE-2021-47347
In the Linux kernel, the following vulnerability has been resolved: wl1251: Fix possible buffer overflow in wl1251_cmd_scan Function wl1251_cmd_scan calls memcpy without checking the length. Harden by checking the length is within the maximum allowed size. En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: wl1251: corrige posible desbordamiento del buffer en wl1251_cmd_scan. La función wl1251_cmd_scan llama a memcpy sin comprobar la longitud. Endurecer comprobando que el largo esté dentro del tamaño máximo permitido. • https://git.kernel.org/stable/c/57ad99ae3c6738ba87bad259bb57c641ca68ebf6 https://git.kernel.org/stable/c/d3d8b9c9c7843dce31e284927d4c9904fd5a510a https://git.kernel.org/stable/c/0f6c0488368c9ac1aa685821916fadba32f5d1ef https://git.kernel.org/stable/c/115103f6e3f1c26c473766c16439c7c8b235529a https://git.kernel.org/stable/c/d71dddeb5380613f9ef199f3e7368fd78fb1a46e https://git.kernel.org/stable/c/c5e4a10d7bd5d4f419d8b9705dff60cf69b302a1 https://git.kernel.org/stable/c/302e2ee34c5f7c5d805b7f835d9a6f2b43474e2a https://git.kernel.org/stable/c/40af3960a15339e8bbd3be50c3bc7b35e • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') •
CVSS: -EPSS: 0%CPEs: 9EXPL: 0CVE-2021-47345 – RDMA/cma: Fix rdma_resolve_route() memory leak
https://notcve.org/view.php?id=CVE-2021-47345
In the Linux kernel, the following vulnerability has been resolved: RDMA/cma: Fix rdma_resolve_route() memory leak Fix a memory leak when "mda_resolve_route() is called more than once on the same "rdma_cm_id". This is possible if cma_query_handler() triggers the RDMA_CM_EVENT_ROUTE_ERROR flow which puts the state machine back and allows rdma_resolve_route() to be called again. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: RDMA/cma: Reparar pérdida de memoria rdma_resolve_route(). Reparar una pérdida de memoria cuando se llama a "mda_resolve_route() más de una vez en el mismo "rdma_cm_id". Esto es posible si cma_query_handler() desencadena el flujo RDMA_CM_EVENT_ROUTE_ERROR que devuelve la máquina de estado y permite volver a llamar a rdma_resolve_route(). • https://git.kernel.org/stable/c/40b613db3a95bc27998e4097d74c2f7e5d083a0b https://git.kernel.org/stable/c/e2da8ce2a9543f3ca5c93369bd1fe6eeb572101a https://git.kernel.org/stable/c/e4e062da082a199357ba4911145f331d40139ad8 https://git.kernel.org/stable/c/4893c938f2a140a74be91779e45e4a7fa111198f https://git.kernel.org/stable/c/032c68b4f5be128a2167f35b558b7cec88fe4972 https://git.kernel.org/stable/c/3d08b5917984f737f32d5bee9737b9075c3895c6 https://git.kernel.org/stable/c/f4f553d67236145fa5fd203ed7b35b9377e19939 https://git.kernel.org/stable/c/07583ba2e2d8947c3d365d97608cb4365 •
CVSS: -EPSS: 0%CPEs: 9EXPL: 0CVE-2021-47343 – dm btree remove: assign new_root only when removal succeeds
https://notcve.org/view.php?id=CVE-2021-47343
In the Linux kernel, the following vulnerability has been resolved: dm btree remove: assign new_root only when removal succeeds remove_raw() in dm_btree_remove() may fail due to IO read error (e.g. read the content of origin block fails during shadowing), and the value of shadow_spine::root is uninitialized, but the uninitialized value is still assign to new_root in the end of dm_btree_remove(). For dm-thin, the value of pmd->details_root or pmd->root will become an uninitialized value, so if trying to read details_info tree again out-of-bound memory may occur as showed below: general protection fault, probably for non-canonical address 0x3fdcb14c8d7520 CPU: 4 PID: 515 Comm: dmsetup Not tainted 5.13.0-rc6 Hardware name: QEMU Standard PC RIP: 0010:metadata_ll_load_ie+0x14/0x30 Call Trace: sm_metadata_count_is_more_than_one+0xb9/0xe0 dm_tm_shadow_block+0x52/0x1c0 shadow_step+0x59/0xf0 remove_raw+0xb2/0x170 dm_btree_remove+0xf4/0x1c0 dm_pool_delete_thin_device+0xc3/0x140 pool_message+0x218/0x2b0 target_message+0x251/0x290 ctl_ioctl+0x1c4/0x4d0 dm_ctl_ioctl+0xe/0x20 __x64_sys_ioctl+0x7b/0xb0 do_syscall_64+0x40/0xb0 entry_SYSCALL_64_after_hwframe+0x44/0xae Fixing it by only assign new_root when removal succeeds En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dm btree remove: asigna new_root solo cuando la eliminación se realiza correctamente. remove_raw() en dm_btree_remove() puede fallar debido a un error de lectura de E/S (por ejemplo, la lectura del contenido del bloque de origen falla durante el sombreado), y el valor de shadow_spine::root no está inicializado, pero el valor no inicializado aún se asigna a new_root al final de dm_btree_remove(). Para dm-thin, el valor de pmd->details_root o pmd->root se convertirá en un valor no inicializado, por lo que si intenta leer el árbol de detalles_info nuevamente, puede ocurrir que la memoria esté fuera de los límites, como se muestra a continuación: falla de protección general, probablemente para no usuarios. -dirección canónica 0x3fdcb14c8d7520 CPU: 4 PID: 515 Comm: dmsetup No contaminado 5.13.0-rc6 Nombre de hardware: QEMU PC estándar RIP: 0010:metadata_ll_load_ie+0x14/0x30 Seguimiento de llamadas: sm_metadata_count_is_more_than_one+0xb9/0xe0 m_shadow_block+0x52/0x1c0 sombra_paso+ 0x59/0xf0 remove_raw+0xb2/0x170 dm_btree_remove+0xf4/0x1c0 dm_pool_delete_thin_device+0xc3/0x140 pool_message+0x218/0x2b0 target_message+0x251/0x290 ctl_ioctl+0x1c4/0x4d0 _ctl_ioctl+0xe/0x20 __x64_sys_ioctl+0x7b/0xb0 do_syscall_64+0x40/0xb0 entrada_SYSCALL_64_after_hwframe+ 0x44/0xae Se soluciona asignando new_root únicamente cuando la eliminación se realiza correctamente • https://git.kernel.org/stable/c/4c84b3e0728ffe10d89c633694c35a02b5c477dc https://git.kernel.org/stable/c/c154775619186781aaf8a99333ac07437a1768d5 https://git.kernel.org/stable/c/73f27adaa73e3057a9ec464e33c4f54d34ea5de3 https://git.kernel.org/stable/c/8fbae4a1bdb5b889490cdee929e68540151536e5 https://git.kernel.org/stable/c/964d57d1962d7e68f0f578f05d9ae4a104d74851 https://git.kernel.org/stable/c/ba47e65a5de3e0e8270301a409fc63d3129fdb9e https://git.kernel.org/stable/c/89bf942314b78d454db92427201421b5dec132d9 https://git.kernel.org/stable/c/ad365e9351ac2b450e7e79932ff6abf59 •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2021-47342 – ext4: fix possible UAF when remounting r/o a mmp-protected file system
https://notcve.org/view.php?id=CVE-2021-47342
In the Linux kernel, the following vulnerability has been resolved: ext4: fix possible UAF when remounting r/o a mmp-protected file system After commit 618f003199c6 ("ext4: fix memory leak in ext4_fill_super"), after the file system is remounted read-only, there is a race where the kmmpd thread can exit, causing sbi->s_mmp_tsk to point at freed memory, which the call to ext4_stop_mmpd() can trip over. Fix this by only allowing kmmpd() to exit when it is stopped via ext4_stop_mmpd(). Bug-Report-Link: <20210629143603.2166962-1-yebin10@huawei.com> En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: corrige posible UAF al remontar el sistema de archivos protegido por r/oa mmp. Después del commit 618f003199c6 ("ext4: corrige la pérdida de memoria en ext4_fill_super"), después de que se vuelve a montar el sistema de archivos solo que hay una ejecución donde el hilo kmmpd puede salir, causando que sbi->s_mmp_tsk apunte a la memoria liberada, con la que la llamada a ext4_stop_mmpd() puede tropezar. Solucione este problema permitiendo que kmmpd() salga solo cuando se detiene a través de ext4_stop_mmpd(). Enlace de informe de error: <20210629143603.2166962-1-yebin10@huawei.com> • https://git.kernel.org/stable/c/b663890d854403e566169f7e90aed5cd6ff64f6b https://git.kernel.org/stable/c/7ed572cdf11081f8f9e07abd4bea56a3f2c4edbd https://git.kernel.org/stable/c/61bb4a1c417e5b95d9edb4f887f131de32e419cb •