CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2021-47567 – powerpc/32: Fix hardlockup on vmap stack overflow
https://notcve.org/view.php?id=CVE-2021-47567
In the Linux kernel, the following vulnerability has been resolved: powerpc/32: Fix hardlockup on vmap stack overflow Since the commit c118c7303ad5 ("powerpc/32: Fix vmap stack - Do not activate MMU before reading task struct") a vmap stack overflow results in a hard lockup. ... En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/32: corrige el bloqueo físico en el desbordamiento de la pila de vmap Desde El commit c118c7303ad5 ("powerpc/32: corrige la pila de vmap - No activar MMU antes de leer la estructura de la tarea") un desbordamiento de la pila de vmap resulta en un bloqueo duro. • https://git.kernel.org/stable/c/c118c7303ad528be8ff2aea8cd1ee15452c763f0 https://git.kernel.org/stable/c/3b234b4a6651ed6bdca94553aa0038fc7ded9271 https://git.kernel.org/stable/c/dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7 https://git.kernel.org/stable/c/c4e3ff8b8b1d54f0c755670174c453b06e17114b https://git.kernel.org/stable/c/5bb60ea611db1e04814426ed4bd1c95d1487678e •
CVSS: 5.5EPSS: 0%CPEs: 8EXPL: 0CVE-2021-47566 – proc/vmcore: fix clearing user buffer by properly using clear_user()
https://notcve.org/view.php?id=CVE-2021-47566
In the Linux kernel, the following vulnerability has been resolved: proc/vmcore: fix clearing user buffer by properly using clear_user() To clear a user buffer we cannot simply use memset, we have to use clear_user(). With a virtio-mem device that registers a vmcore_cb and has some logically unplugged memory inside an added Linux memory block, I can easily trigger a BUG by copying the vmcore via "cp": systemd[1]: Starting Kdump Vmcore Save Service... kdump[420]: Kdump is using the default log level(3). kdump[453]: saving to /sysroot/var/crash/127.0.0.1-2021-11-11-14:59:22/ kdump[458]: saving vmcore-dmesg.txt to /sysroot/var/crash/127.0.0.1-2021-11-11-14:59:22/ kdump[465]: saving vmcore-dmesg.txt complete kdump[467]: saving vmcore BUG: unable to handle page fault for address: 00007f2374e01000 #PF: supervisor write access in kernel mode #PF: error_code(0x0003) - permissions violation PGD 7a523067 P4D 7a523067 PUD 7a528067 PMD 7a525067 PTE 800000007048f867 Oops: 0003 [#1] PREEMPT SMP NOPTI CPU: 0 PID: 468 Comm: cp Not tainted 5.15.0+ #6 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.14.0-27-g64f37cc530f1-prebuilt.qemu.org 04/01/2014 RIP: 0010:read_from_oldmem.part.0.cold+0x1d/0x86 Code: ff ff ff e8 05 ff fe ff e9 b9 e9 7f ff 48 89 de 48 c7 c7 38 3b 60 82 e8 f1 fe fe ff 83 fd 08 72 3c 49 8d 7d 08 4c 89 e9 89 e8 <49> c7 45 00 00 00 00 00 49 c7 44 05 f8 00 00 00 00 48 83 e7 f81 RSP: 0018:ffffc9000073be08 EFLAGS: 00010212 RAX: 0000000000001000 RBX: 00000000002fd000 RCX: 00007f2374e01000 RDX: 0000000000000001 RSI: 00000000ffffdfff RDI: 00007f2374e01008 RBP: 0000000000001000 R08: 0000000000000000 R09: ffffc9000073bc50 R10: ffffc9000073bc48 R11: ffffffff829461a8 R12: 000000000000f000 R13: 00007f2374e01000 R14: 0000000000000000 R15: ffff88807bd421e8 FS: 00007f2374e12140(0000) GS:ffff88807f000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2374e01000 CR3: 000000007a4aa000 CR4: 0000000000350eb0 Call Trace: read_vmcore+0x236/0x2c0 proc_reg_read+0x55/0xa0 vfs_read+0x95/0x190 ksys_read+0x4f/0xc0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae Some x86-64 CPUs have a CPU feature called "Supervisor Mode Access Prevention (SMAP)", which is used to detect wrong access from the kernel to user buffers like this: SMAP triggers a permissions violation on wrong access. ... En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: proc/vmcore: corrige el borrado del búfer del usuario usando correctamente clear_user() Para borrar un búfer de usuario no podemos simplemente usar memset, tenemos que usar clear_user(). Con un dispositivo virtio-mem que registra un vmcore_cb y tiene algo de memoria lógicamente desconectada dentro de un bloque de memoria de Linux agregado, puedo desencadenar fácilmente un ERROR copiando el vmcore a través de "cp": systemd[1]: Iniciando el servicio Kdump Vmcore Save. . kdump[420]: Kdump está utilizando el nivel de registro predeterminado (3). kdump[453]: guardar en /sysroot/var/crash/127.0.0.1-2021-11-11-14:59:22/ kdump[458]: guardar vmcore-dmesg.txt en /sysroot/var/crash/127.0 .0.1-2021-11-11-14:59:22/ kdump[465]: guardar vmcore-dmesg.txt completo kdump[467]: guardar vmcore ERROR: no se puede manejar el error de página para la dirección: 00007f2374e01000 #PF: escritura del supervisor acceso en modo kernel #PF: error_code(0x0003) - violación de permisos PGD 7a523067 P4D 7a523067 PUD 7a528067 PMD 7a525067 PTE 800000007048f867 Ups: 0003 [#1] PREEMPT SMP NOPTI CPU: 0 PID: 468 Comm: p No contaminado 5.15.0+ # 6 Nombre del hardware: PC estándar QEMU (Q35 + ICH9, 2009), BIOS rel-1.14.0-27-g64f37cc530f1-prebuilt.qemu.org 01/04/2014 RIP: 0010:read_from_oldmem.part.0.cold+0x1d/ 0x86 Código: ff ff ff e8 05 ff fe ff e9 b9 e9 7f ff 48 89 de 48 c7 c7 38 3b 60 82 e8 f1 fe fe ff 83 fd 08 72 3c 49 8d 7d 08 4c 89 e9 89 e8 <49> c7 45 00 00 00 00 00 49 C7 44 05 F8 00 00 00 00 48 83 E7 F81 RSP: 0018: FFFFFC9000073BE08 EFLAGS: 00010212 RAX: 00000000000000001000 RBX: 000000002FD000 RCX: 00007F2374E RSI: 000000000000FFFFDFFF RDI: 00007F2374E01008 RBP: 000000000000001000 R08: 0000000000000000 R09: ffffc9000073bc50 R10: ffffc9000073bc48 R11: ffffffff829461a8 R12: 000000000000f000 R13: 00007f2374e01000 R14: 0000000000000000 R15: 88807bd421e8 FS: 00007f2374e12140(0000) GS:ffff88807f000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2 : 00007f2374e01000 CR3: 000000007a4aa000 CR4: 0000000000350eb0 Seguimiento de llamadas: read_vmcore+0x236/0x2c0 proc_reg_read+0x55/0xa0 vfs_read+0x95/0x190 do_syscall_64+0x3b/0x90 Entry_SYSCALL_64_after_hwframe+0x44/0xae Algunas CPU x86-64 tienen una función de CPU llamada "Prevención de acceso en modo supervisor (SMAP)", que se utiliza para detectar accesos incorrectos desde el kernel a los búferes de usuario como este: SMAP desencadena una violación de permisos en caso de acceso incorrecto. • https://git.kernel.org/stable/c/997c136f518c5debd63847e78e2a8694f56dcf90 https://git.kernel.org/stable/c/a9e164bd160be8cbee1df70acb379129e3cd2e7c https://git.kernel.org/stable/c/33a7d698f30fa0b99d50569e9909d3baa65d8f6a https://git.kernel.org/stable/c/99d348b82bcb36171f24411d3f1a15706a2a937a https://git.kernel.org/stable/c/9ef384ed300d1bcfb23d0ab0b487d544444d4b52 https://git.kernel.org/stable/c/fd7974c547abfb03072a4ee706d3a6f182266f89 https://git.kernel.org/stable/c/a8a917058faf4abaec9fb614bb6d5f8fe3529ec6 https://git.kernel.org/stable/c/7b3a34f08d11e7f05cd00b8e09adaa151 • CWE-501: Trust Boundary Violation •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2021-47565 – scsi: mpt3sas: Fix kernel panic during drive powercycle test
https://notcve.org/view.php?id=CVE-2021-47565
In the Linux kernel, the following vulnerability has been resolved: scsi: mpt3sas: Fix kernel panic during drive powercycle test While looping over shost's sdev list it is possible that one of the drives is getting removed and its sas_target object is freed but its sdev object remains intact. Consequently, a kernel panic can occur while the driver is trying to access the sas_address field of sas_target object without also checking the sas_target object for NULL. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: scsi: mpt3sas: solucionó el pánico del kernel durante la prueba de ciclo de energía de la unidad. • https://git.kernel.org/stable/c/f92363d12359498f9a9960511de1a550f0ec41c2 https://git.kernel.org/stable/c/5d4d50b1f159a5ebab7617f47121b4370aa58afe https://git.kernel.org/stable/c/58ef2c7a6de13721865d84b80eecf56d6cba0937 https://git.kernel.org/stable/c/dd035ca0e7a142870a970d46b1d19276cfe2bc8c https://git.kernel.org/stable/c/0d4b29eaadc1f59cec0c7e85eae77d08fcca9824 https://git.kernel.org/stable/c/7e324f734a914957b8cc3ff4b4c9f0409558adb5 https://git.kernel.org/stable/c/2bf9c5a5039c8f4b037236aed505e6a25c1d5f7b https://git.kernel.org/stable/c/8485649a7655e791a6e4e9f15b4d30fda •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2021-47564 – net: marvell: prestera: fix double free issue on err path
https://notcve.org/view.php?id=CVE-2021-47564
In the Linux kernel, the following vulnerability has been resolved: net: marvell: prestera: fix double free issue on err path fix error path handling in prestera_bridge_port_join() that cases prestera driver to crash (see below). Trace: Internal error: Oops: 96000044 [#1] SMP Modules linked in: prestera_pci prestera uio_pdrv_genirq CPU: 1 PID: 881 Comm: ip Not tainted 5.15.0 #1 pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : prestera_bridge_destroy+0x2c/0xb0 [prestera] lr : prestera_bridge_port_join+0x2cc/0x350 [prestera] sp : ffff800011a1b0f0 ... x2 : ffff000109ca6c80 x1 : dead000000000100 x0 : dead000000000122 Call trace: prestera_bridge_destroy+0x2c/0xb0 [prestera] prestera_bridge_port_join+0x2cc/0x350 [prestera] prestera_netdev_port_event.constprop.0+0x3c4/0x450 [prestera] prestera_netdev_event_handler+0xf4/0x110 [prestera] raw_notifier_call_chain+0x54/0x80 call_netdevice_notifiers_info+0x54/0xa0 __netdev_upper_dev_link+0x19c/0x380 En el kernel de Linux, se resolvió la siguiente vulnerabilidad: net: marvell: prestera: corrige el problema de doble liberación en la ruta de error corrige el manejo de la ruta de error en prestera_bridge_port_join() que hace que el controlador de prestera falle (ver más abajo). • https://git.kernel.org/stable/c/e1189d9a5fbec8153dbe03f3589bc2baa96694e2 https://git.kernel.org/stable/c/5dca8eff4627315df98feec09fff9dfe3356325e https://git.kernel.org/stable/c/03e5203d2161a00afe4d97d206d2293e40b2f253 https://git.kernel.org/stable/c/e8d032507cb7912baf1d3e0af54516f823befefd •
CVSS: 5.5EPSS: 0%CPEs: 3EXPL: 0CVE-2021-47563 – ice: avoid bpf_prog refcount underflow
https://notcve.org/view.php?id=CVE-2021-47563
In the Linux kernel, the following vulnerability has been resolved: ice: avoid bpf_prog refcount underflow Ice driver has the routines for managing XDP resources that are shared between ndo_bpf op and VSI rebuild flow. ... __sys_sendto+0xee/0x150 [ 481.293129] __sys_recvmsg+0x56/0xa0 [ 481.297267] do_syscall_64+0x3b/0xc0 [ 481.301395] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 481.307238] RIP: 0033:0x7f5466f39617 [ 481.311373] Code: 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb bd 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2f 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 481.342944] RSP: 002b:00007ffedc7f4308 EFLAGS: 00000246 ORIG_RAX: 000000000000002f [ 481.361783] RAX: ffffffffffffffda RBX: 00007ffedc7f5460 RCX: 00007f5466f39617 [ 481.380278] RDX: 0000000000000000 RSI: 00007ffedc7f5360 RDI: 0000000000000003 [ 481.398500] RBP: 00007ffedc7f53f0 R08: 0000000000000000 R09: 000055d556f04d50 [ 481.416463] R10: 0000000000000077 R11: 0000000000000246 R12: 00007ffedc7f5360 [ 481.434131] R13: 00007ffedc7f5350 R14: 00007ffedc7f5344 R15: 0000000000000e98 [ 481.451520] Modules linked in: ice ---truncated--- En el kernel de Linux, se resolvió la siguiente vulnerabilidad: ice: evitar el subdesbordamiento de refcount de bpf_prog El controlador Ice tiene rutinas para administrar los recursos XDP que se comparten entre la operación ndo_bpf y el flujo de reconstrucción VSI. • https://git.kernel.org/stable/c/efc2214b6047b6f5b4ca53151eba62521b9452d6 https://git.kernel.org/stable/c/e65a8707b4cd756d26d246bb2b9fab06eebafac1 https://git.kernel.org/stable/c/1f10b09ccc832698ef4624a6ab9a213b6ccbda76 https://git.kernel.org/stable/c/f65ee535df775a13a1046c0a0b2d72db342f8a5b •