UBUNTU-CVE-2021-47486

In the Linux kernel, the following vulnerability has been resolved: riscv, bpf: Fix potential NULL dereference The bpfjitbinaryfree function requires a non-NULL argument. When the RISC-V BPF JIT fails to converge in NRJITITERATIONS steps, jitdata-header will be NULL, which triggers a NULL...

CVE-2021-47486

CVE-2021-47486 affects the Linux kernel’s RISC-V BPF JIT: when NR_JIT_ITERATIONS is reached and jit_data->header is NULL, bpf_jit_binary_free() dereferences a NULL and can crash. The fix is a NULL-argument check before calling bpf_jit_binary_free(), per the provided description. Public details...

CVE-2021-47486 riscv, bpf: Fix potential NULL dereference

In the Linux kernel, the following vulnerability has been resolved: riscv, bpf: Fix potential NULL dereference The bpfjitbinaryfree function requires a non-NULL argument. When the RISC-V BPF JIT fails to converge in NRJITITERATIONS steps, jitdata-header will be NULL, which triggers a NULL...

CVE-2021-47486

In the Linux kernel, the following vulnerability has been resolved: riscv, bpf: Fix potential NULL dereference The bpfjitbinaryfree function requires a non-NULL argument. When the RISC-V BPF JIT fails to converge in NRJITITERATIONS steps, jitdata-header will be NULL, which triggers a NULL...

CVE-2021-47486 riscv, bpf: Fix potential NULL dereference

In the Linux kernel, the following vulnerability has been resolved: riscv, bpf: Fix potential NULL dereference The bpfjitbinaryfree function requires a non-NULL argument. When the RISC-V BPF JIT fails to converge in NRJITITERATIONS steps, jitdata-header will be NULL, which triggers a NULL...

CVE-2023-52761

In the Linux kernel, the following vulnerability has been resolved: riscv: VMAPSTACK overflow detection thread-safe commit 31da94c25aea "riscv: add VMAPSTACK overflow detection" added support for CONFIGVMAPSTACK. If overflow is detected, CPU switches to shadowstack temporarily before switching...

CVE-2023-52839 drivers: perf: Do not broadcast to other cpus when starting a counter

In the Linux kernel, the following vulnerability has been resolved: drivers: perf: Do not broadcast to other cpus when starting a counter This command: $ perf record -e cycles:k -e instructions:k -c 10000 -m 64M dd if=/dev/zero of=/dev/null count=1000 gives rise to this kernel warning: 444.364395...

CVE-2023-52761

The CVE-2023-52761 entry concerns a Linux kernel vulnerability on riscv where VMAP_STACK overflow detection was made thread-safe. The patch (commit 31da94c25aea) adds support for CONFIG_VMAP_STACK and optimizes overflow handling by directly using the per-cpu overflow_stack, removing the shadow_st...

CVE-2021-47414

Summary: CVE-2021-47414 concerns a Linux kernel vulnerability on RISCV (SiFive HiFive Unmatched) where ftrace patching may trigger an illegal instruction due to icache/dcache synchronization across CPUs. The root cause is that icache of the current CPU is not flushed before other CPUs are asked t...

CVE-2024-35987

A vulnerability was found in the Linux kernel that affects 64-bit No Memory Management Unit NOMMU systems. The issue arose from a change that allowed using RAM below the kernel load address, which conflicts with the fixed PAGEOFFSET in NOMMU systems. This leads to memory initialization errors and...

CVE-2024-35873

A vulnerability was found in the Linux kernel, affecting the RISC-V architecture. It arises during the restoration of the vector state in the rtsigreturn syscall after a signal handler is executed. The bug occurs when the live vector state is discarded and marked as "dirty," leading to corruption...

UBUNTU-CVE-2024-35988

In the Linux kernel, the following vulnerability has been resolved: riscv: Fix TASKSIZE on 64-bit NOMMU On NOMMU, userspace memory can come from anywhere in physical RAM. The current definition of TASKSIZE is wrong if any RAM exists above 4G, causing spurious failures in the userspace access...

CVE-2024-35873

In the Linux kernel, the following vulnerability has been resolved: riscv: Fix vector state restore in rtsigreturn The RISC-V Vector specification states in "Appendix D: Calling Convention for Vector State" 1 that "Executing a system call causes all caller-saved vector registers v0-v31, vl, vtype...

CVE-2024-35873

In the Linux kernel, the following vulnerability has been resolved: riscv: Fix vector state restore in rtsigreturn The RISC-V Vector specification states in "Appendix D: Calling Convention for Vector State" 1 that "Executing a system call causes all caller-saved vector registers v0-v31, vl, vtype...

CVE-2024-35873 riscv: Fix vector state restore in rt_sigreturn()

In the Linux kernel, the following vulnerability has been resolved: riscv: Fix vector state restore in rtsigreturn The RISC-V Vector specification states in "Appendix D: Calling Convention for Vector State" 1 that "Executing a system call causes all caller-saved vector registers v0-v31, vl, vtype...

CVE-2024-35873 riscv: Fix vector state restore in rt_sigreturn()

In the Linux kernel, the following vulnerability has been resolved: riscv: Fix vector state restore in rtsigreturn The RISC-V Vector specification states in "Appendix D: Calling Convention for Vector State" 1 that "Executing a system call causes all caller-saved vector registers v0-v31, vl, vtype...

CVE-2024-35873

CVE-2024-35873 is a Linux kernel vulnerability affecting the RISC-V vector state handling during rt_sigreturn. A bug in the restoration path with vector state discard could cause the live vector state and vstate to diverge, and when the vectorized path of user_from_copy() is chosen (CONFIG_RISCV_...

CVE-2024-35873 riscv: Fix vector state restore in rt_sigreturn()

In the Linux kernel, the following vulnerability has been resolved: riscv: Fix vector state restore in rtsigreturn The RISC-V Vector specification states in "Appendix D: Calling Convention for Vector State" 1 that "Executing a system call causes all caller-saved vector registers v0-v31, vl, vtype...

CVE-2023-52677 riscv: Check if the code to patch lies in the exit section

In the Linux kernel, the following vulnerability has been resolved: riscv: Check if the code to patch lies in the exit section Otherwise we fall through to vmalloctopage which panics since the address does not lie in the vmalloc region...

CVE-2023-52677 riscv: Check if the code to patch lies in the exit section

In the Linux kernel, the following vulnerability has been resolved: riscv: Check if the code to patch lies in the exit section Otherwise we fall through to vmalloctopage which panics since the address does not lie in the vmalloc region...