page_table_walk

Capture the Flag in Physical Memory You've read about paging. The diagrams make sense. Four levels, 9 bits each, page frame, offset. Sure. But then you hit a challenge that requires actually walking page tables, and you realize you don't know it. You know about it. Big difference. What worked for...

page-table-exploitation

page-table-exploitation A demonstration of how page tables can be used to run arbitrary code in ring-0 and lead to a privesc. Uses CVE-2016-7255 as an example...

Linux Distros Unpatched Vulnerability : CVE-2026-90383

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - misc: sgi-gru: remove interrupt-context page-table walks The GRU TLB miss handler walks a process's page tables without holding page-table locks or a reference ...

CVE-2026-90383

In the Linux kernel, the following vulnerability has been resolved: misc: sgi-gru: remove interrupt-context page-table walks The GRU TLB miss handler walks a process's page tables without holding page-table locks or a reference to the mapped page. It also uses a kernel page-table accessor on user...

DEBIAN-CVE-2026-90383

In the Linux kernel, the following vulnerability has been resolved: misc: sgi-gru: remove interrupt-context page-table walks The GRU TLB miss handler walks a process's page tables without holding page-table locks or a reference to the mapped page. It also uses a kernel page-table accessor on user...

AZL-102504 CVE-2026-90383 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: misc: sgi-gru: remove interrupt-context page-table walks The GRU TLB miss handler walks a process's page tables without holding page-table locks or a reference to the mapped page. It also uses a kernel page-table accessor on user...

EUVD-2026-82044

In the Linux kernel, the following vulnerability has been resolved: misc: sgi-gru: remove interrupt-context page-table walks The GRU TLB miss handler walks a process's page tables without holding page-table locks or a reference to the mapped page. It also uses a kernel page-table accessor on user...

CVE-2026-90383 misc: sgi-gru: remove interrupt-context page-table walks

In the Linux kernel, the following vulnerability has been resolved: misc: sgi-gru: remove interrupt-context page-table walks The GRU TLB miss handler walks a process's page tables without holding page-table locks or a reference to the mapped page. It also uses a kernel page-table accessor on user...

CVE-2026-90383

CVE-2026-90383 affects the Linux kernel's SGI GRU (General Register Unit) driver. The GRU TLB miss handler walks a process's page tables in interrupt context without holding page-table locks or a reference to the mapped page, and uses a kernel page-table accessor on user page tables, supporting o...

KVM-Januscape

KVM-XJ Hot Patch dumptool.py automatically finds offsets; how to use it? Just read the code. Vulnerability Overview CVE-2026-53359 Januscape is a use-after-free UAF vulnerability in the Linux kernel KVM shadow MMU. Lurking time : 16 years August 2010 to July 2026 Affected range : All Intel/AMD x8...

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

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fixed the flushtlbrange function when it is used to erase normal PMD entries PMD entries that point to page tables, along with the PTE entries in the pointed-to page table. In the arm64 version of flushtlbrange, there is ...

Astra Linux – Vulnerability in Linux

In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fixed the PTE update for kernel memory on radix. When adding a PTE, a ptesync is required to ensure that the PTE update is performed correctly. Otherwise, a spurious fault may occur. radixsetpteat does not perform th...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: x86/mm/64: Defined ARCHPAGETABLESYNCMASK and archsynckernelmappings. These definitions ensure that page tables are properly synchronized when calling pdpopulatekernel. For 5-level paging, synchronization is performed via...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ARC: mm: fix leakage of memory allocated for PTE Since the commit d9820ff “ARC: mm: switch pgtablet back to struct page ”, a memory leakage problem occurred. Memory allocated for page table entries wasn’t released during process...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: powerpc/fixmap: Fixed the VM debug warning when unmapping a fixmap entry. The unmapping of a fixmap entry is performed by calling setfixmap, with FIXMAPPAGECLEAR as the flag. Currently, powerpc setfixmap calls mapkernelpage...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: RISCV: Kernel mappings of the EFI page table must be synchronized before switching to the EFI page table. The EFI page table is initially created as a copy of the kernel page table. When VMAPSTACK is enabled, kernel stacks are...

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

In the Linux kernel, the following vulnerability has been resolved: mm: hugetlb: independent PMD page table shared count The refcount may be unexpectedly increased through functions like trygetfolio, especially by calls such as splithugepages. In hugepmdunshare, we use the refcount to check wheth...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pv: fix index value of replaced ASCE The index field of the struct page corresponding to a guest ASCE should be 0. When replacing the ASCE in s390replaceasce, the index of the new ASCE should also be set to 0. Using th...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mm: Avoid leaving partial pfn mappings in error cases. As Jann points out, PFN mappings are special. Unlike normal memory mappings, there is no lifetime information associated with the mapping—it’s just a raw mapping of PFNs,...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fixed an out-of-bounds shift in CalculateVMAndRowBytes. REASON When PTEBufferSizeInRequests is zero, UBSAN reports the following warning because dmllog2 returns an unexpected negative value: The shift exponent...