Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from a memory leak during the vector context allocation in RISC-V virtualization. This vulnerability m...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: RISCV: Misaligned – Restricts user access to kernel memory. The rawcopyto,fromuser function does not call accessok, allowing userspace to access any virtual memory address...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: riscv: mm: added the missing memcpy in kasaninit Hi Atish, It seems that the panic occurs due to the missing memcpy during kasaninit. Could you please check whether this patch is useful? When performing kasanpopulate, the newly...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: riscv: The issue with the handling of SRSPIE set/clear operations during uprobe has been fixed. In riscv, the process of uprobe involves clearing the SPIE before executing the original instruction, and setting the SPIE after...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: arm64: kexec: The kexecbuf structure was previously declared without initialization. The patch series “kexec: Fix invalid field access” addresses this issue. The kexecBuf structure was declared without being initialized. The comm...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: RISCV: Fixed an oops error caused by the irqsoff latency tracer. The tracehardirqson,off functions require the caller to properly set up the frame pointer. This is because these two functions use the macro CALLERADDR1 also known ...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: rcv: move memblockallowresize after linear mapping is ready The initial memblock metadata is accessed from the kernel image mapping. The regions arrays need to be “reallocated” from memblock and accessed through linear mapping to...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: rcv: Fixed a kernel crash caused by PRSETTAGGEDADDRCTRL. When the user space performs PRSETTAGGEDADDRCTRL, but the Supm extension is not available, the kernel crashes: Oops – illegal instruction 1 snip epc:...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: riscv/kprobe: Fixed instruction simulation for JALR. Setting kprobe at ‘jalr 1140ra’ in vfswrite results in the following crash’: 32.092235 Unable to handle kernel access to user memory without uaccess routines at virtual address...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: iommu/riscv: prevented NULL dereferencing in iovatophys. The riscviommupteFetch function returns either NULL for unmapped/never-mapped iovas, or a valid leaf PTE pointer that does not require further validation. The...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: RISCV: Fixed the issue of loading 64-bit NOMMU kernels beyond the start of RAM. The commit 3335068f8721 “RISCV: Use PUD/P4D/PGD pages for the linear mapping” added logic to allow using memory below the kernel’s load address...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: perf: RISCV: Fix for panic occurring in the pmu overflow handler 1 idx of int is not desired when setting bits in unsigned long overflowctrs; use BIT instead. This panic occurs when running ‘perf record -e branches’ on sophgo...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: rcv: fixed the runtime constant support for nommu kernels The runtimefixup32 function does not handle the case where val is zero correctly as may occur when patching a nommu kernel and referring to a physical address below the 4G...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: RISCV: Fixed the use of IPIs in kfenceprotectpage. flushtlbkernelrange may use IPIs to flush the TLBs of all cores, which triggers the following warning when irqs are disabled: 3.455330 WARNING: CPU: 1 PID: 0 at kernel/smp.c:8...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: rvdso: In the vdsojointimens function, a NULL reference was corrected when using vfork. The testing results are as follows in the kernel log: 6.838454 Unable to handle kernel access to user memory without uaccess routines at...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: RISCV: Use READONCENOCHECK in the imprecise unwinding stack mode. When CONFIGFRAMEPOINTER is not set, the stack unwinding function walkstackframe randomly reads from the stack. When KASAN is enabled, this can lead to the followin...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: RISCV: Vector: Fixed the context saving/restoring with xtheadvector. Previously, only v0-v7 were correctly saved/restored, and the context of v8-v31 was corrupted. Now, v8-v31 are correctly saved/restored to avoid breaking the us...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: RISCV: Check whether the code to be patched lies within the exit section. Otherwise, we proceed to vmalloctopage, which panics because the address does not lie within the vmalloc region...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: RISC-V: kexec – Fix for memory leak in the fdt buffer This issue was reported by the kmemleak detector: Unreferenced object: 0xff60000082864000 size: 9588 Command: “kexec”, PID: 146; Jiffies: 4294900634 age: 64.788 seconds Hex du...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: RISCV: Process: Fix kernel information leakage The s12 element of the threadstruct may contain random kernel memory contents, which could potentially be leaked to the user space. This is a security flaw. To address this issue,...