linux kernel security

Linux administrators received a new kernel CVE on May 6, 2026, when kernel.org published CVE-2026-43116 for a netfilter ctnetlink flaw involving unsafe access to a master conntrack object during expectation handling. The bug is not flashy in the way remote-code-execution headlines are flashy...

CISA added CVE-2026-31431, a Linux kernel local privilege escalation flaw known as “Copy Fail,” to its Known Exploited Vulnerabilities Catalog on May 1, 2026, after evidence of active exploitation, triggering mandatory remediation for U.S. federal civilian agencies under BOD 22-01. The move...

CVE-2026-31533 is a critical Linux kernel use-after-free flaw in the kernel TLS encryption path, published April 23, 2026, involving tls_do_encryption() cleanup logic after an -EBUSY crypto backlog condition and now tracked by Microsoft through its Security Update Guide. The WindowsForum angle...

CVE-2026-31499 is a medium-severity Linux kernel Bluetooth vulnerability published on April 22, 2026, in which the L2CAP connection teardown path can deadlock when delayed work callbacks contend for the same connection lock during cleanup. That plain description understates why it matters. This...

CVE-2026-31545 is a medium-severity Linux kernel flaw disclosed by kernel.org on April 24, 2026, affecting the NXP NCI NFC driver when firmware and enable GPIO lines are driven through sleep-capable controllers such as I2C GPIO expanders and fixed through stable kernel patches. The bug is not a...

CVE-2026-31563 is a reminder that some of the most consequential kernel security fixes are not dramatic memory-corruption rewrites, but small context-correctness changes in code paths that run under heavy pressure. The flaw sits in the Linux kernel’s Cadence MACB/GEM Ethernet driver, where...

CVE-2026-31661 is a reminder that kernel security is often decided by small accounting details, not cinematic remote exploits. The newly cataloged Linux kernel flaw affects the brcmsmac Broadcom Wi-Fi driver and centers on a mismatch between the size used for coherent DMA allocation and the size...

CVE-2026-31552 is a reminder that kernel security failures do not always arrive as dramatic memory corruption bugs or remote code execution chains. This Linux Wi-Fi driver flaw turns on a deceptively small change: returning -EAGAIN instead of -ENOMEM when the wlcore driver cannot expand packet...

CVE-2026-31551 is a medium-severity Linux kernel vulnerability that deserves attention not because it is flashy, remote, or wormable, but because it exposes how small concurrency mistakes in performance-sensitive networking code can still produce serious availability failures. The flaw sits in...

CVE-2026-23362 is a reminder that some of the most consequential Linux kernel fixes are not dramatic remote-code-execution stories, but precise corrections in synchronization code that protect specialized systems from crashing at the worst possible moment. The flaw affects the Linux kernel’s CAN...

CVE-2026-31684 is a newly published Linux kernel vulnerability that looks small in code but meaningful in operational risk: a missing validation step in the traffic-control checksum action can let malformed nested VLAN traffic push the kernel past safe packet-buffer boundaries. The issue sits in...

CVE-2026-31676 is not the kind of Linux kernel flaw that usually generates splashy headlines, but it is exactly the sort of subtle networking bug that security teams should not ignore. The issue sits in RxRPC, a kernel-supported remote procedure call transport used by specialized Linux...

CVE-2026-31623 is a small Linux kernel fix with an outsized lesson: obscure device drivers still sit on critical trust boundaries. The flaw affects the cdc-phonet USB networking path, where a malicious device pretending to be a CDC Phonet modem could push the receive path past the allowed skb...

Quick summary CVE-2026-31642 is a Linux kernel vulnerability in the rxrpc networking subsystem. The issue is not a typical remote-code-execution bug; it is a kernel concurrency/list-handling flaw where an RxRPC call was removed from the global rxnet->calls list with the wrong list primitive. The...

CVE-2026-31670 is the kind of Linux kernel flaw that looks modest on paper but matters because it touches a deceptively ordinary system interface: rfkill, the subsystem that lets Linux manage Wi-Fi, Bluetooth, NFC, WWAN, and other radio transmitters. The vulnerability, disclosed through the...

CVE-2026-31604 is a small Linux kernel fix with an outsized lesson: even mundane reference-counting mistakes in Wi-Fi drivers can become security-tracked vulnerabilities when they affect kernel resource lifetime. The issue sits in the Realtek rtw88 USB Wi-Fi driver, where a redundant USB device...

CVE-2026-31581 is a newly published Linux kernel vulnerability in the ALSA 6fire USB audio driver, and while it is not a Windows flaw, it matters to many WindowsForum readers who dual-boot, run Linux audio workstations, maintain WSL environments, or manage mixed Windows/Linux fleets. The bug is...

CVE-2026-23401 is the kind of Linux kernel vulnerability that looks modest on a scorecard but deserves close attention from anyone running KVM-based virtualization on x86 hosts. The flaw sits in KVM’s x86 memory-management code, where a shadow page table entry can be overwritten as an emulated...

CVE-2026-31656 is a newly published Linux kernel vulnerability that turns a small race in Intel’s i915 graphics driver into a potentially serious reliability and memory-safety problem. The flaw sits in the drm/i915/gt heartbeat path, where two kernel execution paths can attempt to release the...

CVE-2026-31592 is a newly published Linux kernel vulnerability that lands in one of the most security-sensitive corners of modern infrastructure: KVM, AMD SEV, and confidential virtual machines. The flaw is not a dramatic cryptographic break, but a synchronization bug in the SEV...