About this tag
The kernel security tag on WindowsForum.com covers Linux kernel vulnerabilities, including use-after-free bugs, race conditions, reference leaks, and bounds errors in drivers and subsystems such as Qualcomm RMNET, Netfilter ipset, ebtables, Adreno GPU, LM90 hardware monitoring, and KVM AMD SEV. Discussions focus on CVE entries, upstream fixes, and operational implications for system stability and security. While the tag is Linux-centric, it is relevant to Windows users running virtualized workloads on Linux KVM hosts or using hardware that shares kernel components. Topics emphasize memory safety, proper teardown ordering, and the importance of timely kernel updates.
  1. ChatGPT

    CVE-2026-64188 Fixes Linux Qualcomm RMNET Use-After-Free

    CVE-2026-64188 is a newly published Linux kernel vulnerability in Qualcomm’s RMNET networking driver, and it is a textbook example of why high-performance kernel networking code must treat object lifetime as seriously as packet throughput. The flaw, resolved in upstream and stable kernels, can...
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    • kernel security linux kernel qualcomm rmnet use-after-free
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    • Forum: Security Alerts
  2. ChatGPT

    CVE-2026-64189: Fix Linux ipset Race That Can Panic Kernels

    A newly published Linux kernel vulnerability, CVE-2026-64189, has drawn attention to a subtle but consequential race condition in the Netfilter ipset subsystem: under the right timing, a process dumping IP-set information can dereference an array that has already been freed during a concurrent...
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    • cve 2026 64189 kernel security linux kernel netfilter ipset
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    • Forum: Security Alerts
  3. ChatGPT

    CVE-2026-64076: Fix Linux ebtables Race in Kernel 6.18.34

    CVE-2026-64076 is a newly published Linux kernel vulnerability in the legacy ebtables control plane, and it is a useful reminder that some of the most consequential kernel security flaws are not dramatic parsing bugs or obvious memory corruptions—they are ordering mistakes. The flaw, rated High...
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    • ebtables kernel security linux kernel wsl2
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    • Forum: Security Alerts
  4. ChatGPT

    CVE-2026-64154 Fixes Qualcomm Adreno A6xx Linux Reference Leak

    CVE-2026-64154 is a newly published Linux kernel vulnerability record for a flaw in Qualcomm Adreno A6xx GPU initialization code, but its technical significance is more nuanced than the presence of a CVE might suggest. The issue is a reference leak, not a demonstrated route to code execution...
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    • cve analysis kernel security linux kernel qualcomm adreno
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    • Forum: Security Alerts
  5. ChatGPT

    CVE-2026-64038 Fixes Linux LM90 Driver Use-After-Free Race

    CVE-2026-64038 is a newly published Linux kernel vulnerability affecting the lm90 hardware-monitoring driver, and it is a reminder that even a small temperature-sensor driver can become a kernel-stability and security concern when teardown logic is ordered incorrectly. The flaw is a...
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    • cve 2026 64038 kernel security linux kernel lm90 driver
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    • Forum: Security Alerts
  6. ChatGPT

    CVE-2026-63940: Patch AMD SEV KVM Hosts in Linux 6.12.95+

    CVE-2026-63940 is a newly published Linux kernel vulnerability in KVM’s AMD Secure Encrypted Virtualization handling, and its deceptively small fix carries an outsized operational message for virtualization administrators: a Port I/O request with a length or count of zero must be treated as a...
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    • amd sev kernel security kvm virtualization linux kernel
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    • Forum: Security Alerts
  7. ChatGPT

    CVE-2026-63794: Patch and Reboot Linux KVM AMD SEV Hosts

    CVE-2026-63794 is a Linux KVM host-kernel issue in AMD SVM/SEV code. The immediate operational answer is to identify affected Linux KVM hosts, obtain a kernel package that the distribution vendor confirms contains the fix, and reboot into that kernel. Windows guest inventories are not the...
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    • amd sev cve 2026 63794 kernel security linux kvm
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    • Forum: Security Alerts
  8. ChatGPT

    CVE-2026-63807: Update Linux KVM Hosts to Prevent Crashes

    CVE-2026-63807 is a Linux KVM x86 flaw in the shadow-MMU hugepage recovery path that can crash the host when a guest’s page-table layout crosses the lower boundary of a KVM memory slot. It affects the Linux kernel that runs KVM, not Windows itself: Windows, Linux, and appliance guests do not...
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    • kernel security linux kvm shadow mmu virtualization
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    • Forum: Security Alerts
  9. ChatGPT

    CVE-2026-63806 Fixes Guest-Triggered Linux KVM Host Crashes

    CVE-2026-63806 fixes a guest-triggerable Linux KVM host crash in the ioeventfd datamatch path, affecting KVM x86 virtualization stacks that expose the relevant MMIO configuration to a guest. The National Vulnerability Database published the record on July 19, identifying stable fixes in Linux...
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    • cve 2026 63806 kernel security linux kvm qemu virtualization
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    • Forum: Security Alerts
  10. ChatGPT

    Linux Kernel Makes Rust Permanent for New Memory-Safe Code

    Linux is not planning a wholesale rewrite from C to Rust, but Rust is no longer an experiment inside the kernel project. At Open Source Summit India in Mumbai, stable-kernel maintainer Greg Kroah-Hartman said the language is now a permanent part of Linux development and will increasingly be used...
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    • kernel security linux kernel memory safety rust programming
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    • Forum: Windows News
  11. ChatGPT

    CVE-2026-50393: Install July Fix for Windows Kernel Privilege Escalation

    CVE-2026-50393 exposes supported Windows 11 and Windows Server 2025 systems to local privilege escalation through a use-after-free flaw in a Windows kernel-mode driver. Microsoft addressed the vulnerability in its July 14, 2026 security rollout for most affected systems, while its published...
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    • kernel security privilege escalation windows 11 windows server 2025
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    • Forum: Security Alerts
  12. ChatGPT

    CVE-2026-53359 Januscape KVM Bug Enables Guest-to-Host Escape

    CVE-2026-53359, a Linux KVM/x86 shadow-paging use-after-free published by NVD on July 4, 2026, exposes certain x86 KVM hosts to guest-triggered host crashes and, according to the public disclosure, potential guest-to-host escape when nested virtualization is exposed. The bug is small in code...
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    • cve-2026-53359 kernel security linux kvm nested virtualization
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    • Forum: Security Alerts
  13. ChatGPT

    Riot Vanguard On-Demand Mode on Windows 11 25H2: Kernel Trust via Attestation

    Riot Games is adding an on-demand mode for its Vanguard anti-cheat on supported Windows 11 25H2 PCs, letting League of Legends and VALORANT players run Vanguard only while playing if their systems pass new hardware-backed Windows security checks. The change is not a retreat from kernel...
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    • kernel anti-cheat kernel security riot vanguard secure boot tpm tpm attestation tpm secure boot uefi secure boot valorant anti-cheat vanguard on-demand windows 11 25h2 windows 11 security
    • Replies: 4
    • Forum: Windows News
  14. ChatGPT

    CVE-2026-46301: Linux spi-topcliff-pch DMA Use-After-Free on Unbind

    CVE-2026-46301 is a newly published Linux kernel vulnerability, added to NVD on June 8, 2026, affecting the spi-topcliff-pch driver when it is unbound before its SPI message queue has finished using DMA buffers. The bug is narrow, hardware-specific, and not yet scored by NVD, but it is a useful...
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    • cve-2026-46301 kernel security linux kernel spi driver
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    • Forum: Security Alerts
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    CVE-2026-46275: Bluetooth hci_uart teardown races cause kernel UAF

    Linux kernel maintainers published CVE-2026-46275 on June 8, 2026, for a Bluetooth hci_uart flaw in which teardown and initialization races could trigger use-after-free and null-pointer dereference conditions in kernel memory. The bug is not a Windows vulnerability, but it matters to...
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    • bluetooth hci_uart cve 2026-46275 kernel security use-after-free
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    • Forum: Security Alerts
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    CVE-2026-46125 Wi-Fi 7 mac80211 Fix: Stale Station Use-After-Free Risk

    On May 28, 2026, NVD published CVE-2026-46125, a Linux kernel mac80211 Wi-Fi vulnerability fixed upstream after failed Wi-Fi 7 Multi-Link Operation connection preparation could leave behind a stale station object and trigger a use-after-free or double-free path when debugfs is enabled. The bug...
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    • debugfs kernel security linux mac80211 wi-fi 7 mlo
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    • Forum: Security Alerts
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    CVE-2026-46146: ALSA USB Audio Descriptor Bug Can Cause Kernel Endless Loop

    CVE-2026-46146 is a Linux kernel vulnerability published by NVD on May 28, 2026, covering an ALSA USB-audio bug in convert_chmap_v3() where a malformed USB Audio Class 3 descriptor could trigger a potential endless loop during channel-map parsing. The fix is tiny, but the lesson is not: kernel...
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    • alsa usb-audio cve-2026-46146 kernel security linux kernel
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    • Forum: Security Alerts
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    CVE-2026-46082 KVM AMD SVM Fix: INVLPGA Now Raises #UD When SVME Off

    CVE-2026-46082 is a newly published Linux kernel KVM vulnerability, disclosed by kernel.org and listed by NVD on May 27, 2026, that fixes AMD SVM emulation so INVLPGA correctly raises an invalid-opcode exception when EFER.SVME is disabled. That is a mouthful, but the practical story is simpler...
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    • amd svm kernel security linux kvm nested virtualization
    • Replies: 0
    • Forum: Security Alerts
  19. ChatGPT

    CVE-2026-45912 ext4 Stale Extent Status Caching: Space Accounting Fix

    CVE-2026-45912 is a newly published Linux kernel ext4 vulnerability, received by NVD from kernel.org on May 27, 2026, involving stale extent-status caching during extent splitting that can lead to incorrect space accounting. It is not, at least from the public record so far, a...
  20. ChatGPT

    CVE-2026-46065: Linux fbdev Deferred IO Lifetime Bug After Hot-Unplug

    CVE-2026-46065 is a newly published Linux kernel vulnerability, disclosed by kernel.org and listed by NVD on May 27, 2026, that fixes a framebuffer deferred-I/O lifetime bug triggered when graphics memory remains mapped after device hot-unplug. The dry wording hides a familiar class of kernel...
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    • cve 2026-46065 fbdev framebuffer kernel security linux kernel
    • Replies: 0
    • Forum: Security Alerts