CVE-2023-3640

SCTF2023kernelpwn SCTF 2023 kernel pwn Off-topic: A little advertisement — the author is a 2024 undergraduate graduate student, participating in this year's autumn recruitment. Feel free to contact me sycrop This problem aims to test two points. 1. The starting points of the cpu entry area mappin...

Linux Distros Unpatched Vulnerability : CVE-2026-89580

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - bpf: Disable preemption in bpfgetstack getperfcallchain returns a per-CPU perfcallchainentry buffer and releases its recursion slot via putcallchainentry before...

Linux Distros Unpatched Vulnerability : CVE-2026-89581

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - bpf, x86: Fix per-CPU address resolution into an extended register The destination of the per-CPU address MOV is encoded in ModRM.reg, which is extended by REX....

CVE-2026-80963

A flaw was found in the Linux kernel's dm-stats module. This vulnerability occurs when the allocation of per-CPU data fails, which can lead to a null pointer dereference during the subsequent cleanup operation. This issue can cause the system to crash, resulting in a Denial of Service DoS...

CVE-2026-89581

A flaw was found in the Linux kernel's handling of Berkeley Packet Filter BPF programs on x86 architecture. An issue with how per-CPU addresses are resolved into extended registers can lead to incorrect memory access. A local attacker could exploit this by running a specially crafted BPF program...

CVE-2026-89547

A flaw was found in the Linux kernel's SUNRPC component. A local administrator, under specific conditions of memory pressure or fault injection during RPC server startup, can trigger a failure in per-CPU counter allocation. This failure leads to uninitialized counters, which, when subsequently...

DEBIAN-CVE-2026-89580

In the Linux kernel, the following vulnerability has been resolved: bpf: Disable preemption in bpfgetstack getperfcallchain returns a per-CPU perfcallchainentry buffer and releases its recursion slot via putcallchainentry before returning, so nothing keeps the entry reserved while bpfgetstack...

CVE-2026-89581

In the Linux kernel, the following vulnerability has been resolved: bpf, x86: Fix per-CPU address resolution into an extended register The destination of the per-CPU address MOV is encoded in ModRM.reg, which is extended by REX.R, but the REX prefix is built with add1mod, which sets REX.B. REX.B...

DEBIAN-CVE-2026-89581

In the Linux kernel, the following vulnerability has been resolved: bpf, x86: Fix per-CPU address resolution into an extended register The destination of the per-CPU address MOV is encoded in ModRM.reg, which is extended by REX.R, but the REX prefix is built with add1mod, which sets REX.B. REX.B...

CVE-2026-89580

In the Linux kernel, the following vulnerability has been resolved: bpf: Disable preemption in bpfgetstack getperfcallchain returns a per-CPU perfcallchainentry buffer and releases its recursion slot via putcallchainentry before returning, so nothing keeps the entry reserved while bpfgetstack...

CVE-2026-89459

In the Linux kernel, the following vulnerability has been resolved: s390/percpu: Fix MVIYPERCPU with older binutils Commit a737737cdb9c "s390/percpu: Infrastructure for more efficient thiscpu operations" introduced MVIYPERCPU, which stringifies arguments that are already C string literals. This...

CVE-2026-80963

In the Linux kernel, the following vulnerability has been resolved: dm-stats: fix a crash if allocation of per-cpu data fails If "dmkvzallocpercpuallocsize, cputonodecpu" fails, the code jumps to the "out" label and calls dmstatfree. dmstatfree does "foreachpossiblecpucpu...

CVE-2026-89581

A BPF x86 JIT flaw in the Linux kernel causes incorrect per-CPU address resolution when the destination is an extended register (R5–R9). The root cause is an encoding error: the REX prefix is built with add_1mod() (setting REX.B) instead of add_2mod() (setting REX.R), so the high register bit is ...

EUVD-2026-76493

In the Linux kernel, the following vulnerability has been resolved: bpf, x86: Fix per-CPU address resolution into an extended register The destination of the per-CPU address MOV is encoded in ModRM.reg, which is extended by REX.R, but the REX prefix is built with add1mod, which sets REX.B. REX.B...

CVE-2026-89581 bpf, x86: Fix per-CPU address resolution into an extended register

In the Linux kernel, the following vulnerability has been resolved: bpf, x86: Fix per-CPU address resolution into an extended register The destination of the per-CPU address MOV is encoded in ModRM.reg, which is extended by REX.R, but the REX prefix is built with add1mod, which sets REX.B. REX.B...

CVE-2026-89581 bpf, x86: Fix per-CPU address resolution into an extended register

In the Linux kernel, the following vulnerability has been resolved: bpf, x86: Fix per-CPU address resolution into an extended register The destination of the per-CPU address MOV is encoded in ModRM.reg, which is extended by REX.R, but the REX prefix is built with add1mod, which sets REX.B. REX.B...

CVE-2026-89581

In the Linux kernel, the following vulnerability has been resolved: bpf, x86: Fix per-CPU address resolution into an extended register The destination of the per-CPU address MOV is encoded in ModRM.reg, which is extended by REX.R, but the REX prefix is built with add1mod, which sets REX.B. REX.B...

EUVD-2026-76492

In the Linux kernel, the following vulnerability has been resolved: bpf: Disable preemption in bpfgetstack getperfcallchain returns a per-CPU perfcallchainentry buffer and releases its recursion slot via putcallchainentry before returning, so nothing keeps the entry reserved while bpfgetstack...

CVE-2026-89580

CVE-2026-89580 is a race condition in the Linux kernel's BPF subsystem , specifically in __bpf_get_stack. A preemptible BPF program (e.g., a non-sleepable raw tracepoint program on a PREEMPT kernel) can be scheduled out between obtaining a per-CPU perf_callchain_entry buffer and copying it. Anoth...

CVE-2026-89580

In the Linux kernel, the following vulnerability has been resolved: bpf: Disable preemption in bpfgetstack getperfcallchain returns a per-CPU perfcallchainentry buffer and releases its recursion slot via putcallchainentry before returning, so nothing keeps the entry reserved while bpfgetstack...