page_table_walk

物理メモリ上のフラグキャプチャ あなたはページングについて読んだことがあります。図表は理解できる。4レベル、各9ビット、ページフレーム、オフセット。確かに。しかし、実際にページテーブルをウォークする必要があるチャレンジに直面すると、自分はそれを知っているわけではないことに気づきます。について知っているだけです。大きな違いです。 私にとって効果的だったのは、QEMUとgdbの前に座り、自分でウォークを行うことでした。すべてのインデックスを計算し、物理メモリからすべてのエントリを読み取り、すべてのポインタを手動で追跡します。そのような半日の作業は、何時間もの講義よりも多くのことを教えてくれま...

SUSE CVE-2026-93074

In the Linux kernel, the following vulnerability has been resolved: dax/fsdev: use vaphys for kaddr in directaccess Use vaphys instead of virtaddr + linearoffset for the kaddr return in fsdevdaxdirectaccess. The previous code added a device-linear byte offset to virtaddr which is va of ranges0, b...

CVE-2026-90387 swiotlb: Preserve allocation virtual address for dynamic pools

In the Linux kernel, the following vulnerability has been resolved: swiotlb: Preserve allocation virtual address for dynamic pools swiotlballoctlb can allocate from the DMA atomic pool when a decrypted pool is needed from atomic context. With CONFIGDMADIRECTREMAP, the atomic pool is backed by...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: validate the virtual address and size of the userq buffer. It is necessary to validate the virtual address of the userq object to determine whether it is located in a valid vm mapping...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: PowerPC: Fixed virtaddrvalid for 64-bit Book3E & 32-bit systems. MPE: On 64-bit Book3E, the vmalloc space starts at 0x8000000000000000. Due to the way pa works, pa0x8000000000000000 returns 0. Consequently,...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fixed the use of VAS memory after freeing it. The reference count on the memory module is dropped before the coprocessor is detached...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: amdgpu: validated offsetinbo of drmamdgpugemva This issue arises due to OOB access in amdgpuvmupdaterange when offsetinbo + mapsize causes an overflow. v2: retained the validations for amdgpuvmbomap v3: added the validations t...

CVE-2026-57843

NetBSD contains an information disclosure vulnerability in mmopen within sys/dev/mm.c that allows unprivileged local users to obtain real kernel virtual addresses by opening world-accessible devices such as /dev/null or /dev/zero, which incorrectly receive the PKKMEM process flag. Attackers can...

CVE-2026-57843

CVE-2026-57843 is an information disclosure vulnerability in NetBSD affecting the mm_open() function in sys/dev/mm.c. The root cause is that world-accessible devices such as /dev/null and /dev/zero are incorrectly assigned the PK_KMEM process flag. This allows unprivileged local users to bypass t...

CVE-2026-74403

In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - Check for page allocation failure correctly in TIO Sashiko notes: if snpallocfirmwarepages returns NULL under memory pressure, is it safe to pass it directly to pageaddress? On architectures without HASHEDPAGEVIRTUA...

PT-2026-72839

In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - Check for page allocation failure correctly in TIO Sashiko notes: if snp alloc firmware pages returns NULL under memory pressure, is it safe to pass it directly to page address? On architectures without HASHED PAGE...

SUSE CVE-2026-68172

In the Linux kernel, the following vulnerability has been resolved: arm64: make hugeptepget handled unaligned addresses hugeptepget can be handed a virtual address pointing to the middle of a contpmd/contpte mapped hugetlb folio examples of callers are pagemaphugetlbrange, pagemappedinvma. The...

CVE-2026-34196

Software installed and run as a non-privileged user may conduct improper GPU system calls to cause an integer overflow and map two GPU virtual addresses to the same physical address. One of these virutal mappings can be freed along with the physical page, allowing for a read/write UAF via the...

CVE-2026-53140

A flaw was found in the Linux kernel's drm/v3d driver. This vulnerability occurs because a specific function, v3drewritecsdjobwgcountsfromindirect, does not correctly release virtual address mappings under certain conditions, specifically when workgroup counts are zero. This oversight results in ...

CVE-2026-53140

In the Linux kernel, the following vulnerability has been resolved: drm/v3d: Fix vaddr leak when indirect CSD has zeroed workgroups v3drewritecsdjobwgcountsfromindirect maps both the indirect buffer and the workgroup buffer and is expected to release them before returning. When any of the workgro...

CVE-2026-53140 drm/v3d: Fix vaddr leak when indirect CSD has zeroed workgroups

In the Linux kernel, the following vulnerability has been resolved: drm/v3d: Fix vaddr leak when indirect CSD has zeroed workgroups v3drewritecsdjobwgcountsfromindirect maps both the indirect buffer and the workgroup buffer and is expected to release them before returning. When any of the workgro...

CVE-2026-52971

In the Linux kernel, the following vulnerability has been resolved: net: ena: PHC: Fix potential use-after-free in gettimestamp Move the phc-active check and resp pointer assignment to after acquiring the spinlock. Previously, phc-active was checked without holding the lock, and resp was cached...

CVE-2026-52971

In the Linux kernel, the following vulnerability has been resolved: net: ena: PHC: Fix potential use-after-free in gettimestamp Move the phc-active check and resp pointer assignment to after acquiring the spinlock. Previously, phc-active was checked without holding the lock, and resp was cached...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: mm/vmalloc: The vmappurgelock must be taken in the shrinker function. The decayvapoolnode function can be invoked concurrently from two paths: 1. purgevmaparealazy, when pools are being purged; 2. The shrinker via...

CVE-2026-46325

Summary (details from sources): CVE-2026-46325 affects the Linux kernel RDMA/rxe code, where iova-to-va conversion fails when MR page_size differs from system PAGE_SIZE. The bug arises because rxe_set_page() uses mr->page_size steps while the page_list holds PAGE_SIZE pages, and ib_sg_to_page(...