security patch

Microsoft’s security advisory for CVE-2026-21255 confirms a Windows Hyper‑V vulnerability classed as a Security Feature Bypass and directs administrators to prioritize vendor-supplied updates; the public advisory is intentionally terse on exploit mechanics, so defenders must act on the vendor...

GitHub’s Copilot integration for JetBrains IDEs has been linked to a high‑severity command‑injection / remote code‑execution class flaw that can allow attacker‑controlled content to become executable on a developer’s workstation, and vendor tracking entries (including Microsoft’s Update Guide)...

Microsoft was forced into a rare series of out‑of‑band emergency patches after January’s security rollup triggered system crashes, boot failures, and application regressions that left both home users and enterprises scrambling for fixes and workarounds. Background What happened, in plain terms...

Microsoft’s latest Windows 11 cumulative update isn’t glamorous, but it’s important — and in practical terms it’s a strong argument for hitting “Check for updates” sooner rather than later. The patch bundles critical security hardening, a servicing‑stack update that smooths future patching, and...

Microsoft's first cumulative Windows 11 update of 2026 — delivered as KB5074109 on January 13 — has left a broad trail of disruption: critical security fixes were installed, but several high-impact regressions followed, forcing Microsoft into rapid damage control with out‑of‑band patches and...

Microsoft’s January 13, 2026 cumulative update for Windows 11—KB5074109—delivers a heavyweight security rollup and several quality fixes, but it also introduced at least one verified enterprise-impacting regression and a raft of community-reported compatibility problems that make careful rollout...

A high‑confidence elevation‑of‑privilege vulnerability has been recorded in the Azure Connected Machine (azcmagent) / Azure Arc agent ecosystem under CVE‑2026‑21224, touching an agent component that bridges on‑host systems with the Azure management plane — a class of flaws that can convert a...

Microsoft's security track for January 2026 includes an advisory for CVE-2026-20934, a Windows SMB Server Elevation of Privilege vulnerability that Microsoft has cataloged in the Security Update Guide. The entry identifies the affected component as the Server Message Block (SMB) Server and...

The Linux kernel received a targeted repair that closes a robustness hole in the gs_usb CAN-over-USB driver: CVE-2025-68307 fixes improper handling of failed bulk URBs in gs_usb_xmit_callback, a defect that could silently consume transmit URBs and eventually halt CAN transmission on affected...

A late probe failure in the Linux kernel’s MOST USB stack has been tracked as CVE-2025-68290 and patched after maintainers fixed a double-free and related use-after-free paths that could crash systems or, in the worst case, be abused for memory-corruption attacks. Background The vulnerability...

A heap-based buffer overflow has been disclosed in the HDF5 library that can be triggered while flushing object messages: the flaw exists in the function H5O_msg_flush in src/H5Omessage.c (tracked as CVE‑2025‑2912) and affects HDF5 releases up to and including 1.14.6. The issue can be provoked...

Capstone, the widely used disassembly framework, contains a memory‑safety bug (CVE‑2025‑68114) in SStream_concat where an unchecked return from vsnprintf can drive the stream index negative or past its end — a flaw fixed upstream in a December 2025 commit but one that can produce stack buffer...

The Apache Log4j Core SocketAppender fails to verify the TLS hostname on peer certificates — a subtle but important omission that can allow a man‑in‑the‑middle to intercept or redirect log traffic when certain conditions are met. Apache has fixed the flaw in Log4j Core 2.25.3 and published a...

Microsoft’s December patch cycle produced a compatibility regression that left Message Queuing (MSMQ) queues inactive, IIS sites throwing opaque “insufficient resources” errors, and enterprise message-driven applications unable to write messages — a problem Microsoft has confirmed and patched...

The Linux kernel has received a targeted fix for CVE-2025-38131 — a race-condition in the CoreSight configfs handling that could allow an active trace configuration to be deactivated while it is being enabled, producing a reliable use‑after‑free (UAF) and a local denial‑of‑service condition...

Google’s December stable update corrected two high‑severity Chromium issues — a use‑after‑free in WebGPU (CVE‑2025‑14765) and an out‑of‑bounds read/write in V8 (CVE‑2025‑14766) — and the fixes were rolled into Chrome stable (143.0.7499.146/.147), with downstream consumers such as Microsoft Edge...

A small but important defensive patch landed in the Linux kernel in mid‑December 2025 that fixes a crash in the AMD DRM display stack: CVE‑2025‑68196 addresses a race where the display code could reference dc->current_state while calling into dc_update_planes_and_stream during link training (LT)...

A recently published Linux-kernel CVE, CVE-2025-68237, patches an integer‑overflow bug in the mtdchar read/write ioctls that — while not described as an immediate remote code‑execution vector — can produce incorrect arithmetic, allocation mistakes, and availability failures; maintainers fixed...

A newly recorded Linux kernel vulnerability, tracked as CVE-2025-68261, fixes a subtle race in ext4 by adding i_data_sem protection to ext4_destroy_inline_data_nolock, closing a window where inline-data teardown and block-mapping can collide and trigger a kernel BUG or panic. Background /...

A recently assigned CVE — CVE-2025-68264 — targets the Linux kernel’s ext4 filesystem and documents a race-condition bug that can let stale inline-data size metadata lead to a kernel BUG_ON crash during writes to tiny “inline” files, prompting immediate patching across kernel trees and...