CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-26936 – ksmbd: validate request buffer size in smb2_allocate_rsp_buf()
https://notcve.org/view.php?id=CVE-2024-26936
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate request buffer size in smb2_allocate_rsp_buf() The response buffer should be allocated in smb2_allocate_rsp_buf before validating request. But the fields in payload as well as smb2 header is used in smb2_allocate_rsp_buf(). This patch add simple buffer size validation to avoid potencial out-of-bounds in request buffer. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: validar el tamaño del búfer de solicitud en smb2_allocate_rsp_buf() El búfer de respuesta debe asignarse en smb2_allocate_rsp_buf antes de validar la solicitud. Pero los campos en el payload y el encabezado smb2 se usan en smb2_allocate_rsp_buf(). • https://git.kernel.org/stable/c/8f3d0bf1d0c62b539d54c5b9108a845cff619b99 https://git.kernel.org/stable/c/21ff9d7d223c5c19cb4334009e4c0c83a2f4d674 https://git.kernel.org/stable/c/5c20b242d4fed73a93591e48bfd9772e2322fb11 https://git.kernel.org/stable/c/2c27a64a2bc47d9bfc7c3cf8be14be53b1ee7cb6 https://git.kernel.org/stable/c/17cf0c2794bdb6f39671265aa18aea5c22ee8c4a •
CVSS: 5.5EPSS: 0%CPEs: 7EXPL: 0CVE-2024-26978 – serial: max310x: fix NULL pointer dereference in I2C instantiation
https://notcve.org/view.php?id=CVE-2024-26978
In the Linux kernel, the following vulnerability has been resolved: serial: max310x: fix NULL pointer dereference in I2C instantiation When trying to instantiate a max14830 device from userspace: echo max14830 0x60 > /sys/bus/i2c/devices/i2c-2/new_device we get the following error: Unable to handle kernel NULL pointer dereference at virtual address... ... Call trace: max310x_i2c_probe+0x48/0x170 [max310x] i2c_device_probe+0x150/0x2a0 ... Add check for validity of devtype to prevent the error, and abort probe with a meaningful error message. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: serial: max310x: corrige la desreferencia del puntero NULL en la creación de instancias I2C Al intentar crear una instancia de un dispositivo max14830 desde el espacio de usuario: echo max14830 0x60 > /sys/bus/i2c/devices/i2c-2/ new_device obtenemos el siguiente error: No se puede manejar la desreferencia del puntero NULL del kernel en la dirección virtual... ... Rastreo de llamadas: max310x_i2c_probe+0x48/0x170 [max310x] i2c_device_probe+0x150/0x2a0... Agregar verificación de validez del tipo de desarrollo para evitar el error y cancelar la sonda con un mensaje de error significativo. • https://git.kernel.org/stable/c/f5c252aaa1be5d38604e58e9bd335065f767d0d8 https://git.kernel.org/stable/c/85d79478710ad2cbf11857aec107084a7104943e https://git.kernel.org/stable/c/2e1f2d9a9bdbe12ee475c82a45ac46a278e8049a https://git.kernel.org/stable/c/7d271b798add90c6196539167c019d0817285cf0 https://git.kernel.org/stable/c/c45e53c27b78afd6c81fc25608003576f27b5735 https://git.kernel.org/stable/c/12609c76b755dbeb1645c0aacc0f0f4743b2eff3 https://git.kernel.org/stable/c/2160ad6861c4a21d3fa553d7b2aaec6634a37f8a https://git.kernel.org/stable/c/5cd8af02b466e1beeae13e2de3dc58fcc • CWE-476: NULL Pointer Dereference •
CVSS: -EPSS: 0%CPEs: 6EXPL: 0CVE-2024-26977 – pci_iounmap(): Fix MMIO mapping leak
https://notcve.org/view.php?id=CVE-2024-26977
In the Linux kernel, the following vulnerability has been resolved: pci_iounmap(): Fix MMIO mapping leak The #ifdef ARCH_HAS_GENERIC_IOPORT_MAP accidentally also guards iounmap(), which means MMIO mappings are leaked. Move the guard so we call iounmap() for MMIO mappings. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: pci_iounmap(): corrige la fuga de mapeo MMIO El #ifdef ARCH_HAS_GENERIC_IOPORT_MAP accidentalmente también protege iounmap(), lo que significa que se filtraron los mapeos MMIO. Mueva la guardia para que llamemos a iounmap() para asignaciones MMIO. • https://git.kernel.org/stable/c/316e8d79a0959c302b0c462ab64b069599f10eef https://git.kernel.org/stable/c/5e4b23e7a7b33a1e56bfa3e5598138a2234d55b6 https://git.kernel.org/stable/c/6d21d0356aa44157a62e39c0d1a13d4c69a8d0c8 https://git.kernel.org/stable/c/b5d40f02e7222da032c2042aebcf2a07de9b342f https://git.kernel.org/stable/c/f3749345a9b7295dd071d0ed589634cb46364f77 https://git.kernel.org/stable/c/af280e137e273935f2e09f4d73169998298792ed https://git.kernel.org/stable/c/7626913652cc786c238e2dd7d8740b17d41b2637 •
CVSS: 7.0EPSS: 0%CPEs: 9EXPL: 0CVE-2024-26976 – KVM: Always flush async #PF workqueue when vCPU is being destroyed
https://notcve.org/view.php?id=CVE-2024-26976
In the Linux kernel, the following vulnerability has been resolved: KVM: Always flush async #PF workqueue when vCPU is being destroyed Always flush the per-vCPU async #PF workqueue when a vCPU is clearing its completion queue, e.g. when a VM and all its vCPUs is being destroyed. KVM must ensure that none of its workqueue callbacks is running when the last reference to the KVM _module_ is put. Gifting a reference to the associated VM prevents the workqueue callback from dereferencing freed vCPU/VM memory, but does not prevent the KVM module from being unloaded before the callback completes. Drop the misguided VM refcount gifting, as calling kvm_put_kvm() from async_pf_execute() if kvm_put_kvm() flushes the async #PF workqueue will result in deadlock. async_pf_execute() can't return until kvm_put_kvm() finishes, and kvm_put_kvm() can't return until async_pf_execute() finishes: WARNING: CPU: 8 PID: 251 at virt/kvm/kvm_main.c:1435 kvm_put_kvm+0x2d/0x320 [kvm] Modules linked in: vhost_net vhost vhost_iotlb tap kvm_intel kvm irqbypass CPU: 8 PID: 251 Comm: kworker/8:1 Tainted: G W 6.6.0-rc1-e7af8d17224a-x86/gmem-vm #119 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 Workqueue: events async_pf_execute [kvm] RIP: 0010:kvm_put_kvm+0x2d/0x320 [kvm] Call Trace: <TASK> async_pf_execute+0x198/0x260 [kvm] process_one_work+0x145/0x2d0 worker_thread+0x27e/0x3a0 kthread+0xba/0xe0 ret_from_fork+0x2d/0x50 ret_from_fork_asm+0x11/0x20 </TASK> ---[ end trace 0000000000000000 ]--- INFO: task kworker/8:1:251 blocked for more than 120 seconds. Tainted: G W 6.6.0-rc1-e7af8d17224a-x86/gmem-vm #119 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/8:1 state:D stack:0 pid:251 ppid:2 flags:0x00004000 Workqueue: events async_pf_execute [kvm] Call Trace: <TASK> __schedule+0x33f/0xa40 schedule+0x53/0xc0 schedule_timeout+0x12a/0x140 __wait_for_common+0x8d/0x1d0 __flush_work.isra.0+0x19f/0x2c0 kvm_clear_async_pf_completion_queue+0x129/0x190 [kvm] kvm_arch_destroy_vm+0x78/0x1b0 [kvm] kvm_put_kvm+0x1c1/0x320 [kvm] async_pf_execute+0x198/0x260 [kvm] process_one_work+0x145/0x2d0 worker_thread+0x27e/0x3a0 kthread+0xba/0xe0 ret_from_fork+0x2d/0x50 ret_from_fork_asm+0x11/0x20 </TASK> If kvm_clear_async_pf_completion_queue() actually flushes the workqueue, then there's no need to gift async_pf_execute() a reference because all invocations of async_pf_execute() will be forced to complete before the vCPU and its VM are destroyed/freed. And that in turn fixes the module unloading bug as __fput() won't do module_put() on the last vCPU reference until the vCPU has been freed, e.g. if closing the vCPU file also puts the last reference to the KVM module. Note that kvm_check_async_pf_completion() may also take the work item off the completion queue and so also needs to flush the work queue, as the work will not be seen by kvm_clear_async_pf_completion_queue(). Waiting on the workqueue could theoretically delay a vCPU due to waiting for the work to complete, but that's a very, very small chance, and likely a very small delay. • https://git.kernel.org/stable/c/af585b921e5d1e919947c4b1164b59507fe7cd7b https://git.kernel.org/stable/c/ab2c2f5d9576112ad22cfd3798071cb74693b1f5 https://git.kernel.org/stable/c/82e25cc1c2e93c3023da98be282322fc08b61ffb https://git.kernel.org/stable/c/f8730d6335e5f43d09151fca1f0f41922209a264 https://git.kernel.org/stable/c/83d3c5e309611ef593e2fcb78444fc8ceedf9bac https://git.kernel.org/stable/c/b54478d20375874aeee257744dedfd3e413432ff https://git.kernel.org/stable/c/a75afe480d4349c524d9c659b1a5a544dbc39a98 https://git.kernel.org/stable/c/4f3a3bce428fb439c66a578adc447afce • CWE-400: Uncontrolled Resource Consumption •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2024-26975 – powercap: intel_rapl: Fix a NULL pointer dereference
https://notcve.org/view.php?id=CVE-2024-26975
In the Linux kernel, the following vulnerability has been resolved: powercap: intel_rapl: Fix a NULL pointer dereference A NULL pointer dereference is triggered when probing the MMIO RAPL driver on platforms with CPU ID not listed in intel_rapl_common CPU model list. This is because the intel_rapl_common module still probes on such platforms even if 'defaults_msr' is not set after commit 1488ac990ac8 ("powercap: intel_rapl: Allow probing without CPUID match"). Thus the MMIO RAPL rp->priv->defaults is NULL when registering to RAPL framework. Fix the problem by adding sanity check to ensure rp->priv->rapl_defaults is always valid. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: powercap: intel_rapl: corrige una desreferencia de puntero NULL Se activa una desreferencia de puntero NULL al probar el controlador MMIO RAPL en plataformas con ID de CPU que no figuran en la lista de modelos de CPU intel_rapl_common. Esto se debe a que el módulo intel_rapl_common aún sondea en dichas plataformas incluso si 'defaults_msr' no está configurado después de confirmar 1488ac990ac8 ("powercap: intel_rapl: Permitir sondeo sin coincidencia de CPUID"). Por lo tanto, MMIO RAPL rp->priv->defaults es NULL cuando se registra en el marco RAPL. • https://git.kernel.org/stable/c/1488ac990ac886b1209aa9f94c0c66022bcc8827 https://git.kernel.org/stable/c/0641908b906a133f1494c312a71f9fecbe2b6c78 https://git.kernel.org/stable/c/9b254feb249981b66ccdb1dae54e757789a15ba1 https://git.kernel.org/stable/c/2f73cf2ae5e0f4e629db5be3a4380ff7807148e6 https://git.kernel.org/stable/c/2d1f5006ff95770da502f8cee2a224a1ff83866e •