CVE-2026-93181

CVE-2026-93181 affects the Linux kernel in the perf/x86/intel/uncore subsystem. The root cause is an incorrect call ordering: in the CPU online path, uncore_box_ref() was invoked before uncore_change_context(), so the gate on box->cpu >= 0 always failed and the uncore box was never initiali...

CVE-2026-90273

CVE-2026-90273 affects the Linux kernel in the coresight etm4x driver. In the perf enable path, cscfg_csdev_disable_active_config() is not called in two error cases: when branch broadcast is selected but not supported by hardware, and when etm4_enable_hw() fails. This results in a leak of config_...

EUVD-2026-81866

In the Linux kernel, the following vulnerability has been resolved: coresight: etm4x: missing cscfgcsdevdisableactiveconfig in perf enable In the perf enable path, there are missing cases where cscfgcsdevdisableactiveconfig is not called: - Branch broadcast is selected but not supported by the...

CVE-2026-89791

In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when perf mmap revival races with the last munmap perfmmapclose drops rb-mmapcount without holding event-mmapmutex the refcountdecandtest right before the refcountdecandmutexlock of event-mmapcount. A...

UBUNTU-CVE-2026-89791

In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when perf mmap revival races with the last munmap perfmmapclose drops rb-mmapcount without holding event-mmapmutex the refcountdecandtest right before the refcountdecandmutexlock of event-mmapcount. A...

EUVD-2026-80584

In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel: Fix kernel address leakages in LBR stack Before Arch LBR gained CPL filtering support, a user-only branch stack could still contain kernel addresses. As a result, kernel branch records may be exposed to user space...

CVE-2026-89791

In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when perf mmap revival races with the last munmap perfmmapclose drops rb-mmapcount without holding event-mmapmutex the refcountdecandtest right before the refcountdecandmutexlock of event-mmapcount. A...

CVE-2026-89791

In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when perf mmap revival races with the last munmap perfmmapclose drops rb-mmapcount without holding event-mmapmutex the refcountdecandtest right before the refcountdecandmutexlock of event-mmapcount. A...

EUVD-2026-80312

In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when perf mmap revival races with the last munmap perfmmapclose drops rb-mmapcount without holding event-mmapmutex the refcountdecandtest right before the refcountdecandmutexlock of event-mmapcount. A...

CVE-2026-89791 perf: Fix use-after-free when perf mmap() revival races with the last munmap()

In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when perf mmap revival races with the last munmap perfmmapclose drops rb-mmapcount without holding event-mmapmutex the refcountdecandtest right before the refcountdecandmutexlock of event-mmapcount. A...

CVE-2026-89791

CVE-2026-89791 is a use-after-free race condition in the Linux kernel's perf subsystem . The root cause is that perf_mmap_close() drops rb->mmap_count without holding event->mmap_mutex, allowing a concurrent perf_mmap_rb() revival path to free a newly allocated ring buffer that another proc...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: cpufreq: Avoid a bad reference count on the CPU node. In the parseperfdomain function, if the call to ofparsephandlewithargs returns an error, then the reference to the CPU device node acquired at the beginning of the function wi...

Astra Linux - Vulnerability in linux-5.15

In the Linux kernel, the following vulnerability has been resolved: drm/i915/gem: Actually move i915gemcontext.link under reference protection i915perf assumes that it can use the i915gemcontext reference to protect its i915-gem.contexts.list iteration. However, this requires that we do not remov...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: ftrace: Fixed a use-after-free issue related to dynamic ftraceops. KASAN reported a use-after-free when using ftrace. It was discovered that perf registered two ftrace operations with the same content, both being dynamic. Afte...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: cgroup: Split cgroupdestroywq into 3 workqueues A hang can occur during 1 LTP cgroup testing when repeatedly mounting/unmounting perfevent and netprio controllers with systemd.unifiedcgrouphierarchy=1. The hang manifests in...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: perf: Fixed the issue with sample generation versus doexit. Baisheng Gao reported a crash in ARM64 mode. Mark interpreted this as a synchronous external abort—most likely due to attempting to access MMIO in a faulty way. The...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: perf/aux: Fixed AUX buffer serialization. Ole reported that the event-mmapmutex is strictly insufficient to serialize the AUX buffer. To serialize it properly, a per-RB mutex should be added...

Linux Distros Unpatched Vulnerability : CVE-2026-89460

"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - s390/cpumcf: Handle CPU hotplug via prepare/dead callbacks The command 'perf stat -e cycles -- ' crashes the kernel when CPUs are hotplug added during that run...

Linux Distros Unpatched Vulnerability : CVE-2026-89443

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - platform/x86: ISST: Validate level in perf mask ioctls isstifgetperflevelmask and isstifgetbasefreqmask use the user-provided level as an index into perflevels...

CVE-2026-89460

A flaw was found in the Linux kernel. A local user can trigger a kernel panic by running the perf stat command while CPUs are being hotplugged. This occurs because the system fails to properly allocate CPU event structures for newly online CPUs, leading to a null pointer dereference. Successful...