CVSS: 4.4EPSS: 0%CPEs: 8EXPL: 0CVE-2023-52477 – usb: hub: Guard against accesses to uninitialized BOS descriptors
https://notcve.org/view.php?id=CVE-2023-52477
In the Linux kernel, the following vulnerability has been resolved: usb: hub: Guard against accesses to uninitialized BOS descriptors Many functions in drivers/usb/core/hub.c and drivers/usb/core/hub.h access fields inside udev->bos without checking if it was allocated and initialized. If usb_get_bos_descriptor() fails for whatever reason, udev->bos will be NULL and those accesses will result in a crash: BUG: kernel NULL pointer dereference, address: 0000000000000018 PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 5 PID: 17818 Comm: kworker/5:1 Tainted: G W 5.15.108-18910-gab0e1cb584e1 #1 <HASH:1f9e 1> Hardware name: Google Kindred/Kindred, BIOS Google_Kindred.12672.413.0 02/03/2021 Workqueue: usb_hub_wq hub_event RIP: 0010:hub_port_reset+0x193/0x788 Code: 89 f7 e8 20 f7 15 00 48 8b 43 08 80 b8 96 03 00 00 03 75 36 0f b7 88 92 03 00 00 81 f9 10 03 00 00 72 27 48 8b 80 a8 03 00 00 <48> 83 78 18 00 74 19 48 89 df 48 8b 75 b0 ba 02 00 00 00 4c 89 e9 RSP: 0018:ffffab740c53fcf8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffa1bc5f678000 RCX: 0000000000000310 RDX: fffffffffffffdff RSI: 0000000000000286 RDI: ffffa1be9655b840 RBP: ffffab740c53fd70 R08: 00001b7d5edaa20c R09: ffffffffb005e060 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: ffffab740c53fd3e R14: 0000000000000032 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffffa1be96540000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000018 CR3: 000000022e80c005 CR4: 00000000003706e0 Call Trace: hub_event+0x73f/0x156e ? hub_activate+0x5b7/0x68f process_one_work+0x1a2/0x487 worker_thread+0x11a/0x288 kthread+0x13a/0x152 ? process_one_work+0x487/0x487 ? kthread_associate_blkcg+0x70/0x70 ret_from_fork+0x1f/0x30 Fall back to a default behavior if the BOS descriptor isn't accessible and skip all the functionalities that depend on it: LPM support checks, Super Speed capabilitiy checks, U1/U2 states setup. • https://git.kernel.org/stable/c/c64e4dca9aefd232b17ac4c779b608b286654e81 https://git.kernel.org/stable/c/8e7346bfea56453e31b7421c1c17ca2fb9ed613d https://git.kernel.org/stable/c/6ad3e9fd3632106696692232bf7ff88b9f7e1bc3 https://git.kernel.org/stable/c/241f230324337ed5eae3846a554fb6d15169872c https://git.kernel.org/stable/c/528f0ba9f7a4bc1b61c9b6eb591ff97ca37cac6b https://git.kernel.org/stable/c/fb9895ab9533534335fa83d70344b397ac862c81 https://git.kernel.org/stable/c/136f69a04e71ba3458d137aec3bb2ce1232c0289 https://git.kernel.org/stable/c/f74a7afc224acd5e922c7a2e52244d891 • CWE-476: NULL Pointer Dereference •
CVSS: 5.5EPSS: 0%CPEs: 4EXPL: 0CVE-2023-52476 – perf/x86/lbr: Filter vsyscall addresses
https://notcve.org/view.php?id=CVE-2023-52476
In the Linux kernel, the following vulnerability has been resolved: perf/x86/lbr: Filter vsyscall addresses We found that a panic can occur when a vsyscall is made while LBR sampling is active. If the vsyscall is interrupted (NMI) for perf sampling, this call sequence can occur (most recent at top): __insn_get_emulate_prefix() insn_get_emulate_prefix() insn_get_prefixes() insn_get_opcode() decode_branch_type() get_branch_type() intel_pmu_lbr_filter() intel_pmu_handle_irq() perf_event_nmi_handler() Within __insn_get_emulate_prefix() at frame 0, a macro is called: peek_nbyte_next(insn_byte_t, insn, i) Within this macro, this dereference occurs: (insn)->next_byte Inspecting registers at this point, the value of the next_byte field is the address of the vsyscall made, for example the location of the vsyscall version of gettimeofday() at 0xffffffffff600000. The access to an address in the vsyscall region will trigger an oops due to an unhandled page fault. To fix the bug, filtering for vsyscalls can be done when determining the branch type. This patch will return a "none" branch if a kernel address if found to lie in the vsyscall region. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: perf/x86/lbr: Filtrar direcciones vsyscall Descubrimos que puede ocurrir un pánico cuando se realiza una vsyscall mientras el muestreo LBR está activo. • https://git.kernel.org/stable/c/403d201d1fd144cb249836dafb222f6375871c6c https://git.kernel.org/stable/c/3863989497652488a50f00e96de4331e5efabc6c https://git.kernel.org/stable/c/f71edacbd4f99c0e12fe4a4007ab4d687d0688db https://git.kernel.org/stable/c/e53899771a02f798d436655efbd9d4b46c0f9265 https://access.redhat.com/security/cve/CVE-2023-52476 https://bugzilla.redhat.com/show_bug.cgi?id=2267041 • CWE-404: Improper Resource Shutdown or Release •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2023-52475 – Input: powermate - fix use-after-free in powermate_config_complete
https://notcve.org/view.php?id=CVE-2023-52475
In the Linux kernel, the following vulnerability has been resolved: Input: powermate - fix use-after-free in powermate_config_complete syzbot has found a use-after-free bug [1] in the powermate driver. This happens when the device is disconnected, which leads to a memory free from the powermate_device struct. When an asynchronous control message completes after the kfree and its callback is invoked, the lock does not exist anymore and hence the bug. Use usb_kill_urb() on pm->config to cancel any in-progress requests upon device disconnection. [1] https://syzkaller.appspot.com/bug?extid=0434ac83f907a1dbdd1e En el kernel de Linux, se resolvió la siguiente vulnerabilidad: Entrada: powermate - corrige el use-after-free en powermate_config_complete syzbot ha encontrado un error de use-after-free [1] en el controlador powermate. Esto sucede cuando el dispositivo está desconectado, lo que genera una memoria libre de la estructura powermate_device. • https://git.kernel.org/stable/c/8677575c4f39d65bf0d719b5d20e8042e550ccb9 https://git.kernel.org/stable/c/67cace72606baf1758fd60feb358f4c6be92e1cc https://git.kernel.org/stable/c/5aa514100aaf59868d745196258269a16737c7bd https://git.kernel.org/stable/c/cd2fbfd8b922b7fdd50732e47d797754ab59cb06 https://git.kernel.org/stable/c/6a4a396386404e62fb59bc3bde48871a64a82b4f https://git.kernel.org/stable/c/2efe67c581a2a6122b328d4bb6f21b3f36f40d46 https://git.kernel.org/stable/c/e528b1b9d60743e0b26224e3fe7aa74c24b8b2f8 https://git.kernel.org/stable/c/5c15c60e7be615f05a45cd905093a54b1 •
CVSS: 5.5EPSS: 0%CPEs: 3EXPL: 0CVE-2021-46928 – parisc: Clear stale IIR value on instruction access rights trap
https://notcve.org/view.php?id=CVE-2021-46928
In the Linux kernel, the following vulnerability has been resolved: parisc: Clear stale IIR value on instruction access rights trap When a trap 7 (Instruction access rights) occurs, this means the CPU couldn't execute an instruction due to missing execute permissions on the memory region. In this case it seems the CPU didn't even fetched the instruction from memory and thus did not store it in the cr19 (IIR) register before calling the trap handler. So, the trap handler will find some random old stale value in cr19. This patch simply overwrites the stale IIR value with a constant magic "bad food" value (0xbaadf00d), in the hope people don't start to try to understand the various random IIR values in trap 7 dumps. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: parisc: borra el valor IIR obsoleto en la trampa de derechos de acceso a instrucciones Cuando ocurre una trampa 7 (derechos de acceso a instrucciones), esto significa que la CPU no pudo ejecutar una instrucción debido a que faltan permisos de ejecución en la región de la memoria. En este caso, parece que la CPU ni siquiera obtuvo la instrucción de la memoria y, por lo tanto, no la almacenó en el registro cr19 (IIR) antes de llamar al controlador de trampas. • https://git.kernel.org/stable/c/d01e9ce1af6116f812491d3d3873d204f10ae0b8 https://git.kernel.org/stable/c/e96373f0a5f484bc1e193f9951dcb3adf24bf3f7 https://git.kernel.org/stable/c/484730e5862f6b872dca13840bed40fd7c60fa26 • CWE-755: Improper Handling of Exceptional Conditions •
CVSS: 5.5EPSS: 0%CPEs: 2EXPL: 0CVE-2021-46926 – ALSA: hda: intel-sdw-acpi: harden detection of controller
https://notcve.org/view.php?id=CVE-2021-46926
In the Linux kernel, the following vulnerability has been resolved: ALSA: hda: intel-sdw-acpi: harden detection of controller The existing code currently sets a pointer to an ACPI handle before checking that it's actually a SoundWire controller. This can lead to issues where the graph walk continues and eventually fails, but the pointer was set already. This patch changes the logic so that the information provided to the caller is set when a controller is found. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: hda: intel-sdw-acpi: reforzar la detección del controlador El código existente actualmente establece un puntero a un identificador ACPI antes de verificar que en realidad es un controlador SoundWire. Esto puede provocar problemas en los que el recorrido del gráfico continúa y finalmente falla, pero el puntero ya estaba configurado. Este parche cambia la lógica para que la información proporcionada a la persona que llama se establezca cuando se encuentra un controlador. • https://git.kernel.org/stable/c/cce476954401e3421afafb25bbaa926050688b1d https://git.kernel.org/stable/c/385f287f9853da402d94278e59f594501c1d1dad •