CVSS: -EPSS: 0%CPEs: 6EXPL: 0CVE-2023-52750 – arm64: Restrict CPU_BIG_ENDIAN to GNU as or LLVM IAS 15.x or newer
https://notcve.org/view.php?id=CVE-2023-52750
In the Linux kernel, the following vulnerability has been resolved: arm64: Restrict CPU_BIG_ENDIAN to GNU as or LLVM IAS 15.x or newer Prior to LLVM 15.0.0, LLVM's integrated assembler would incorrectly byte-swap NOP when compiling for big-endian, and the resulting series of bytes happened to match the encoding of FNMADD S21, S30, S0, S0. This went unnoticed until commit: 34f66c4c4d5518c1 ("arm64: Use a positive cpucap for FP/SIMD") Prior to that commit, the kernel would always enable the use of FPSIMD early in boot when __cpu_setup() initialized CPACR_EL1, and so usage of FNMADD within the kernel was not detected, but could result in the corruption of user or kernel FPSIMD state. After that commit, the instructions happen to trap during boot prior to FPSIMD being detected and enabled, e.g. | Unhandled 64-bit el1h sync exception on CPU0, ESR 0x000000001fe00000 -- ASIMD | CPU: 0 PID: 0 Comm: swapper Not tainted 6.6.0-rc3-00013-g34f66c4c4d55 #1 | Hardware name: linux,dummy-virt (DT) | pstate: 400000c9 (nZcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) | pc : __pi_strcmp+0x1c/0x150 | lr : populate_properties+0xe4/0x254 | sp : ffffd014173d3ad0 | x29: ffffd014173d3af0 x28: fffffbfffddffcb8 x27: 0000000000000000 | x26: 0000000000000058 x25: fffffbfffddfe054 x24: 0000000000000008 | x23: fffffbfffddfe000 x22: fffffbfffddfe000 x21: fffffbfffddfe044 | x20: ffffd014173d3b70 x19: 0000000000000001 x18: 0000000000000005 | x17: 0000000000000010 x16: 0000000000000000 x15: 00000000413e7000 | x14: 0000000000000000 x13: 0000000000001bcc x12: 0000000000000000 | x11: 00000000d00dfeed x10: ffffd414193f2cd0 x9 : 0000000000000000 | x8 : 0101010101010101 x7 : ffffffffffffffc0 x6 : 0000000000000000 | x5 : 0000000000000000 x4 : 0101010101010101 x3 : 000000000000002a | x2 : 0000000000000001 x1 : ffffd014171f2988 x0 : fffffbfffddffcb8 | Kernel panic - not syncing: Unhandled exception | CPU: 0 PID: 0 Comm: swapper Not tainted 6.6.0-rc3-00013-g34f66c4c4d55 #1 | Hardware name: linux,dummy-virt (DT) | Call trace: | dump_backtrace+0xec/0x108 | show_stack+0x18/0x2c | dump_stack_lvl+0x50/0x68 | dump_stack+0x18/0x24 | panic+0x13c/0x340 | el1t_64_irq_handler+0x0/0x1c | el1_abort+0x0/0x5c | el1h_64_sync+0x64/0x68 | __pi_strcmp+0x1c/0x150 | unflatten_dt_nodes+0x1e8/0x2d8 | __unflatten_device_tree+0x5c/0x15c | unflatten_device_tree+0x38/0x50 | setup_arch+0x164/0x1e0 | start_kernel+0x64/0x38c | __primary_switched+0xbc/0xc4 Restrict CONFIG_CPU_BIG_ENDIAN to a known good assembler, which is either GNU as or LLVM's IAS 15.0.0 and newer, which contains the linked commit. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: arm64: restringe CPU_BIG_ENDIAN a GNU como o LLVM IAS 15.x o posterior. Antes de LLVM 15.0.0, el ensamblador integrado de LLVM intercambiaba bytes incorrectamente con NOP al compilar para big-endian. y la serie de bytes resultante coincidió con la codificación de FNMADD S21, S30, S0, S0. Esto pasó desapercibido hasta la confirmación: 34f66c4c4d5518c1 ("arm64: use un cpucap positivo para FP/SIMD") Antes de esa confirmación, el kernel siempre habilitaba el uso de FPSIMD al principio del arranque cuando __cpu_setup() inicializaba CPACR_EL1, y por lo tanto el uso de FNMADD dentro del kernel no se detectó, pero podría provocar la corrupción del estado FPSIMD del usuario o del kernel. Después de esa confirmación, las instrucciones se bloquean durante el arranque antes de que se detecte y habilite FPSIMD, por ejemplo | Excepción de sincronización el1h de 64 bits no controlada en CPU0, ESR 0x000000001fe00000 - ASIMD | CPU: 0 PID: 0 Comunicaciones: intercambiador No contaminado 6.6.0-rc3-00013-g34f66c4c4d55 #1 | Nombre del hardware: linux,dummy-virt (DT) | pstate: 400000c9 (nZcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) | ordenador personal: __pi_strcmp+0x1c/0x150 | lr: poblar_properties+0xe4/0x254 | sp: ffffd014173d3ad0 | x29: ffffd014173d3af0 x28: ffffbfffddffcb8 x27: 0000000000000000 | x26: 0000000000000058 x25: ffffbfffddfe054 x24: 0000000000000008 | x23: ffffbffffddfe000 x22: ffffbfffddfe000 x21: ffffbfffddfe044 | x20: ffffd014173d3b70 x19: 0000000000000001 x18: 0000000000000005 | x17: 0000000000000010 x16: 0000000000000000 x15: 00000000413e7000 | x14: 0000000000000000 x13: 0000000000001bcc x12: 0000000000000000 | x11: 00000000d00dfeed x10: ffffd414193f2cd0 x9: 0000000000000000 | x8: 0101010101010101 x7: ffffffffffffffc0 x6: 0000000000000000 | x5: 0000000000000000 x4: 0101010101010101 x3: 000000000000002a | x2: 0000000000000001 x1: ffffd014171f2988 x0: ffffbfffddffcb8 | Pánico del kernel: no se sincroniza: excepción no controlada | CPU: 0 PID: 0 Comunicaciones: intercambiador No contaminado 6.6.0-rc3-00013-g34f66c4c4d55 #1 | Nombre del hardware: linux,dummy-virt (DT) | Rastreo de llamadas: | dump_backtrace+0xec/0x108 | show_stack+0x18/0x2c | dump_stack_lvl+0x50/0x68 | dump_stack+0x18/0x24 | pánico+0x13c/0x340 | el1t_64_irq_handler+0x0/0x1c | el1_abort+0x0/0x5c | el1h_64_sync+0x64/0x68 | __pi_strcmp+0x1c/0x150 | unflatten_dt_nodes+0x1e8/0x2d8 | __unflatten_device_tree+0x5c/0x15c | unflatten_device_tree+0x38/0x50 | setup_arch+0x164/0x1e0 | start_kernel+0x64/0x38c | __primary_switched+0xbc/0xc4 Restrinja CONFIG_CPU_BIG_ENDIAN a un buen ensamblador conocido, que sea GNU o LLVM's IAS 15.0.0 y posteriores, que contiene la confirmación vinculada. • https://git.kernel.org/stable/c/d08a1e75253b4e19ae290b1c35349f12cfcebc0a https://git.kernel.org/stable/c/936c9c10efaefaf1ab3ef020e1f8aaaaff1ad2f9 https://git.kernel.org/stable/c/ef0224ee5399ea8a46bc07dc6c6494961ed5fdd2 https://git.kernel.org/stable/c/bd31e534721ab95ef237020fe6995c899ffdf21a https://git.kernel.org/stable/c/69e619d2fd056fe1f5d0adf01584f2da669e0d28 https://git.kernel.org/stable/c/146a15b873353f8ac28dc281c139ff611a3c4848 •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2023-52749 – spi: Fix null dereference on suspend
https://notcve.org/view.php?id=CVE-2023-52749
In the Linux kernel, the following vulnerability has been resolved: spi: Fix null dereference on suspend A race condition exists where a synchronous (noqueue) transfer can be active during a system suspend. This can cause a null pointer dereference exception to occur when the system resumes. Example order of events leading to the exception: 1. spi_sync() calls __spi_transfer_message_noqueue() which sets ctlr->cur_msg 2. Spi transfer begins via spi_transfer_one_message() 3. System is suspended interrupting the transfer context 4. System is resumed 6. spi_controller_resume() calls spi_start_queue() which resets cur_msg to NULL 7. • https://git.kernel.org/stable/c/4ec4508db97502a12daee88c74782e8d35ced068 https://git.kernel.org/stable/c/96474ea47dc67b0704392d59192b233c8197db0e https://git.kernel.org/stable/c/bef4a48f4ef798c4feddf045d49e53c8a97d5e37 •
CVSS: -EPSS: 0%CPEs: 6EXPL: 0CVE-2023-52748 – f2fs: avoid format-overflow warning
https://notcve.org/view.php?id=CVE-2023-52748
In the Linux kernel, the following vulnerability has been resolved: f2fs: avoid format-overflow warning With gcc and W=1 option, there's a warning like this: fs/f2fs/compress.c: In function ‘f2fs_init_page_array_cache’: fs/f2fs/compress.c:1984:47: error: ‘%u’ directive writing between 1 and 7 bytes into a region of size between 5 and 8 [-Werror=format-overflow=] 1984 | sprintf(slab_name, "f2fs_page_array_entry-%u:%u", MAJOR(dev), MINOR(dev)); | ^~ String "f2fs_page_array_entry-%u:%u" can up to 35. The first "%u" can up to 4 and the second "%u" can up to 7, so total size is "24 + 4 + 7 = 35". slab_name's size should be 35 rather than 32. En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: f2fs: evitar aviso de desbordamiento de formato. Con la opción gcc y W=1, aparece un aviso como este: fs/f2fs/compress.c: En la función 'f2fs_init_page_array_cache': fs/f2fs /compress.c:1984:47: error: directiva '%u' escribiendo entre 1 y 7 bytes en una región de tamaño entre 5 y 8 [-Werror=format-overflow=] 1984 | sprintf(slab_name, "f2fs_page_array_entry-%u:%u", MAJOR(dev), MINOR(dev)); | ^~ La cadena "f2fs_page_array_entry-%u:%u" puede tener hasta 35. El primer "%u" puede tener hasta 4 y el segundo "%u" puede hasta 7, por lo que el tamaño total es "24 + 4 + 7 = 35". • https://git.kernel.org/stable/c/c041f5ddef00c731c541e00bc8ae97b8c84c682f https://git.kernel.org/stable/c/e4088d7d8f1123006d46a42edf51b8c960a58ef9 https://git.kernel.org/stable/c/526dd7540a09ecf87b5f54f3ab4e0a2528f25a79 https://git.kernel.org/stable/c/6fca08fd3085253b48fcb1bd243a0a5e18821a00 https://git.kernel.org/stable/c/3eebe636cac53886bd5d1cdd55e082ec9e84983f https://git.kernel.org/stable/c/e0d4e8acb3789c5a8651061fbab62ca24a45c063 •
CVSS: 5.5EPSS: 0%CPEs: 4EXPL: 0CVE-2021-47432 – lib/generic-radix-tree.c: Don't overflow in peek()
https://notcve.org/view.php?id=CVE-2021-47432
In the Linux kernel, the following vulnerability has been resolved: lib/generic-radix-tree.c: Don't overflow in peek() When we started spreading new inode numbers throughout most of the 64 bit inode space, that triggered some corner case bugs, in particular some integer overflows related to the radix tree code. Oops. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: lib/generic-radix-tree.c: No se desborda en peek() Cuando comenzamos a distribuir nuevos números de inodos en la mayor parte del espacio de inodos de 64 bits, eso activó algunas esquinas. errores de casos, en particular algunos desbordamientos de enteros relacionados con el código del árbol de base. Ups. • https://git.kernel.org/stable/c/784d01f9bbc282abb0c5ade5beb98a87f50343ac https://git.kernel.org/stable/c/ec298b958cb0c40d70c68079da933c8f31c5134c https://git.kernel.org/stable/c/aa7f1827953100cdde0795289a80c6c077bfe437 https://git.kernel.org/stable/c/9492261ff2460252cf2d8de89cdf854c7e2b28a0 https://access.redhat.com/security/cve/CVE-2021-47432 https://bugzilla.redhat.com/show_bug.cgi?id=2282366 •
CVSS: -EPSS: 0%CPEs: 6EXPL: 0CVE-2023-52747 – IB/hfi1: Restore allocated resources on failed copyout
https://notcve.org/view.php?id=CVE-2023-52747
In the Linux kernel, the following vulnerability has been resolved: IB/hfi1: Restore allocated resources on failed copyout Fix a resource leak if an error occurs. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: IB/hfi1: restaurar los recursos asignados en caso de copia fallida. Reparar una fuga de recursos si se produce un error. • https://git.kernel.org/stable/c/f404ca4c7ea8e650ba09ba87c71c7a89c865d5be https://git.kernel.org/stable/c/00d9e212b8a39e6ffcf31b9d2e503d2bf6009d45 https://git.kernel.org/stable/c/7896accedf5bf1277d2f305718e36dc8bac7e321 https://git.kernel.org/stable/c/79b595d9591426156a9e0635a5b5115508a36fef https://git.kernel.org/stable/c/9bae58d58b6bb73b572356b31a62d2afc7378d12 https://git.kernel.org/stable/c/0a4f811f2e5d07bbd0c9226f4afb0a1270a831ae https://git.kernel.org/stable/c/6601fc0d15ffc20654e39486f9bef35567106d68 •