EUVD-2026-32350

In the Linux kernel, the following vulnerability has been resolved: apparmor: avoid per-cpu hold underflow in aagetbuffer When aagetbuffer pulls from the per-cpu list it unconditionally decrements cache-hold. If hold reaches 0 while count is still non-zero, the unsigned decrement wraps to UINTMAX...

CVE-2026-45884

In the Linux kernel, the following vulnerability has been resolved: apparmor: avoid per-cpu hold underflow in aagetbuffer When aagetbuffer pulls from the per-cpu list it unconditionally decrements cache-hold. If hold reaches 0 while count is still non-zero, the unsigned decrement wraps to UINTMAX...

CVE-2026-45880

In the Linux kernel, the following vulnerability has been resolved: PCI/P2PDMA: Release per-CPU pgmap ref when vminsertpage fails When vminsertpage fails in p2pmemallocmmap, p2pmemallocmmap doesn't invoke percpurefput to free the per-CPU ref of pgmap acquired after genpoolallocowner, and...

UBUNTU-CVE-2026-45884

In the Linux kernel, the following vulnerability has been resolved: apparmor: avoid per-cpu hold underflow in aagetbuffer When aagetbuffer pulls from the per-cpu list it unconditionally decrements cache-hold. If hold reaches 0 while count is still non-zero, the unsigned decrement wraps to UINTMAX...

CVE-2026-45884 apparmor: avoid per-cpu hold underflow in aa_get_buffer

In the Linux kernel, the following vulnerability has been resolved: apparmor: avoid per-cpu hold underflow in aagetbuffer When aagetbuffer pulls from the per-cpu list it unconditionally decrements cache-hold. If hold reaches 0 while count is still non-zero, the unsigned decrement wraps to UINTMAX...

CVE-2026-45884

In the Linux kernel, the following vulnerability has been resolved: apparmor: avoid per-cpu hold underflow in aagetbuffer When aagetbuffer pulls from the per-cpu list it unconditionally decrements cache-hold. If hold reaches 0 while count is still non-zero, the unsigned decrement wraps to UINTMAX...

CVE-2026-45884

Summary of CVE-2026-45884 (Linux kernel, AppArmor): The issue is an integer underflow in aa_get_buffer() when dequeuing from the per-CPU list. If cache->hold drops to zero while count is non-zero, the unsigned decrement can wrap to UINT_MAX, keeping hold non-zero and causing aa_put_buffer() to...

CVE-2026-45884 apparmor: avoid per-cpu hold underflow in aa_get_buffer

In the Linux kernel, the following vulnerability has been resolved: apparmor: avoid per-cpu hold underflow in aagetbuffer When aagetbuffer pulls from the per-cpu list it unconditionally decrements cache-hold. If hold reaches 0 while count is still non-zero, the unsigned decrement wraps to UINTMAX...

CVE-2026-45880

In the Linux kernel, the following vulnerability has been resolved: PCI/P2PDMA: Release per-CPU pgmap ref when vminsertpage fails When vminsertpage fails in p2pmemallocmmap, p2pmemallocmmap doesn't invoke percpurefput to free the per-CPU ref of pgmap acquired after genpoolallocowner, and...

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 the percpuref in the md/md-llbitmap driver. This vulnerability causes permanent damage if the pau...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: crypto: zstd – fix double-free in per-CPU stream cleanup The crypto/zstd module contains a double-free bug that occurs when multiple tfms are allocated and freed. The issue arises because the zstdstreams per-CPU contexts are free...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix for a race condition in devmap on PREEMPTRT On PREEMPTRT kernels, the per-CPU xdpdevbulkqueue bq can be accessed concurrently by multiple preemptible tasks on the same CPU. The original code assumes that bqenqueue and...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: iptunnel: iptunnelxmitstats should be adapted to use NETDEVPCPUSTATDSTATS. The commits that caused this issue overlooked the fact that vxlan/geneve uses udptunnel6xmitskb, which calls iptunnelxmitstats. iptunnelxmitstats assumed...

GHSA-R6C9-G6Q5-QRF9 OpenTelemetry eBPF Instrumentation: CPU-mismatch fallback uses 256-byte buffer with 8KB size

Summary The per-CPU message-buffer fallback path uses a 256-byte backup buffer but preserves the original payload size, which can be up to 8KB. If a CPU mismatch occurs, OBI can read beyond the fallback buffer and leak adjacent memory into telemetry. Details...

OpenTelemetry eBPF Instrumentation: CPU-mismatch fallback uses 256-byte buffer with 8KB size

Summary The per-CPU message-buffer fallback path uses a 256-byte backup buffer but preserves the original payload size, which can be up to 8KB. If a CPU mismatch occurs, OBI can read beyond the fallback buffer and leak adjacent memory into telemetry. Details...

PT-2026-41786

Name of the Vulnerable Software and Affected Versions OpenTelemetry eBPF Instrumentation versions prior to 0.9.0 Description The per-CPU message-buffer fallback path uses a 256-byte backup buffer but preserves the original payload size, which can reach up to 8KB. If a CPU mismatch occurs between...

CVE-2026-43374

A flaw was found in the Linux kernel's networking net: nexthop component. When a nexthop is removed from a group, the system prematurely frees per-CPU percpu statistics memory. This timing issue allows other parts of the kernel that are still referencing the old group to access and potentially...

CVE-2026-43288

A flaw was found in the Linux kernel's ext4 filesystem. A local user can trigger a system panic, leading to a Denial of Service DoS, by mounting a specially crafted ext4 filesystem with specific quota and project options. This occurs because a per-CPU counter is accessed before it is properly...

EUVD-2026-28558

In the Linux kernel, the following vulnerability has been resolved: ext4: move ext4percpuparaminit before ext4mbinit When running kvm-xfstests -c ext4/1k -C 1 generic/383 with the DOUBLECHECK macro defined, the following panic is triggered:...

UBUNTU-CVE-2026-43331

In the Linux kernel, the following vulnerability has been resolved: x86/kexec: Disable KCOV instrumentation after loadsegments The loadsegments function changes segment registers, invalidating GS base which KCOV relies on for per-cpu data. When CONFIGKCOV is enabled, any subsequent instrumented C...