windows_kernel_shadow_stack

Pruebas de concepto Este proyecto tiene como objetivo destacar ciertos aspectos de la mitigación de shadow stack implementada por Microsoft en Windows 11. El código está específicamente enfocado en Windows 11 24H2. Es posible que no funcione en otras versiones de Windows 11, debido a la gestión d...

kernel: Linux kernel: Arbitrary code execution via userfaultfd shadow stack manipulation

A flaw was found in the Linux kernel's userfaultfd mechanism. A local attacker with userfaultfd access could register on shadow stack Virtual Memory Areas VMAs. By discarding a page and injecting a page with chosen return addresses, an attacker could achieve arbitrary code execution. This...

kernel: Linux kernel: Arbitrary code execution via userfaultfd shadow stack manipulation

A flaw was found in the Linux kernel's userfaultfd mechanism. A local attacker with userfaultfd access could register on shadow stack Virtual Memory Areas VMAs. By discarding a page and injecting a page with chosen return addresses, an attacker could achieve arbitrary code execution. This...

Astra Linux – Vulnerability in Linux 5.15

In the efirtasmwrapper of efi-rt-wrapper.S, there is a possible way to bypass shadow stack protection due to a logical error in the code. This could result in a local escalation of privileges without the need for additional execution privileges. User interaction is not required for exploitation...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: RISCV: Fixed a race condition when vmap stack overflow occurs. Currently, when detecting vmap stack overflow, RISCV first switches to the so-called shadow stack, and then uses this shadow stack to call getoverflowstack, in order ...

UBUNTU-CVE-2026-72385

In the Linux kernel, the following vulnerability has been resolved: tracing/fprobe: Fix NULL pointer dereference in fprobefgraphentry fprobefgraphentry sizes a shadow-stack reservation in one walk of the per-ip fprobe list and fills it in a second walk, both under rcureadlock only. A fprobe...

EUVD-2026-59284

In the Linux kernel, the following vulnerability has been resolved: tracing/fprobe: Fix NULL pointer dereference in fprobefgraphentry fprobefgraphentry sizes a shadow-stack reservation in one walk of the per-ip fprobe list and fills it in a second walk, both under rcureadlock only. A fprobe...

CVE-2026-72385 tracing/fprobe: Fix NULL pointer dereference in fprobe_fgraph_entry()

In the Linux kernel, the following vulnerability has been resolved: tracing/fprobe: Fix NULL pointer dereference in fprobefgraphentry fprobefgraphentry sizes a shadow-stack reservation in one walk of the per-ip fprobe list and fills it in a second walk, both under rcureadlock only. A fprobe...

SUSE CVE-2026-68166

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: prevent registration of special VMAs Vova Tokarev says: userfaultfd allows registration on shadow stack VMAs. With userfaultfd access, you can register on the shadow stack, discard a page ... and inject a page with...

CVE-2026-68166

A flaw was found in the Linux kernel's userfaultfd mechanism. A local attacker with userfaultfd access could register on shadow stack Virtual Memory Areas VMAs. By discarding a page and injecting a page with chosen return addresses, an attacker could achieve arbitrary code execution. This...

CVE-2026-68166

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: prevent registration of special VMAs Vova Tokarev says: userfaultfd allows registration on shadow stack VMAs. With userfaultfd access, you can register on the shadow stack, discard a page ... and inject a page with...

AZL-94734 CVE-2026-68166 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: prevent registration of special VMAs Vova Tokarev says: userfaultfd allows registration on shadow stack VMAs. With userfaultfd access, you can register on the shadow stack, discard a page ... and inject a page with...

UBUNTU-CVE-2026-68166

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: prevent registration of special VMAs Vova Tokarev says: userfaultfd allows registration on shadow stack VMAs. With userfaultfd access, you can register on the shadow stack, discard a page ... and inject a page with...

CVE-2026-68166

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: prevent registration of special VMAs Vova Tokarev says: userfaultfd allows registration on shadow stack VMAs. With userfaultfd access, you can register on the shadow stack, discard a page ... and inject a page with...

CVE-2026-68166

The CVE-2026-68166 issue in the Linux kernel is addressed by restricting userfaultfd registrations. The fix updates vma_can_userfault() to reject VM_SHADOW_STACK and VM_SPECIAL so that drivers implementing vm_uffd_ops cannot register special VMAs with userfaultfd. VM_SPECIAL’s inclusion of VM_DON...

EUVD-2026-55552

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: prevent registration of special VMAs Vova Tokarev says: userfaultfd allows registration on shadow stack VMAs. With userfaultfd access, you can register on the shadow stack, discard a page ... and inject a page with...

CVE-2026-68166 userfaultfd: prevent registration of special VMAs

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: prevent registration of special VMAs Vova Tokarev says: userfaultfd allows registration on shadow stack VMAs. With userfaultfd access, you can register on the shadow stack, discard a page ... and inject a page with...

CVE-2026-68166 userfaultfd: prevent registration of special VMAs

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: prevent registration of special VMAs Vova Tokarev says: userfaultfd allows registration on shadow stack VMAs. With userfaultfd access, you can register on the shadow stack, discard a page ... and inject a page with...

Linux Distros Unpatched Vulnerability : CVE-2026-68166

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - userfaultfd: prevent registration of special VMAs Vova Tokarev says: userfaultfd allows registration on shadow stack VMAs. With userfaultfd access, you can...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: scs: A wrong parameter was fixed in scsmagic. The scsmagic function requires a void variable, but a struct taskstruct is provided instead. taskscstsk represents the starting address of the task’s shadow call stack, and...