linux kernel security

About this tag
The linux kernel security tag on WindowsForum covers Linux kernel vulnerabilities that affect Windows estates through hybrid infrastructure. Recent discussions include CVE-2026-53232 (SFP probe cleanup), CVE-2026-52930 (shared-memory race), CVE-2026-53226 (Rockchip GPIO use-after-free), CVE-2026-53183 (MPTCP receive-window DoS), CVE-2026-53148 (Thunderbolt buffer overflow), CVE-2026-45850 (IPVS IPv6 checksum flaw), CVE-2026-46323 (GRO zerocopy use-after-free), and CVE-2026-46319 (act_ct use-after-free). These threads emphasize that Windows administrators must track Linux kernel security because of WSL, Hyper-V, Azure, containers, and network appliances. The tag focuses on CVEs, patch impact, and risk management for hybrid environments.

  1. CVE-2026-53232 Linux Kernel SFP Probe Cleanup: Why Windows Shops Should Care

    CVE-2026-53232 is a newly published Linux kernel vulnerability disclosed by kernel.org and added to the NVD dataset on June 25, 2026, affecting PHY/SFP probing logic in drivers/net/phy/phy_device.c when a failed probe leaves stale upstream SFP state behind. The bug is not a Windows...
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    • cve 2026-53232 linux kernel security patch management sfp networking
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    • Forum: Security Alerts

  2. CVE-2026-52930: Linux Shared Memory Race and Why Windows Teams Must Care

    CVE-2026-52930 is a Linux kernel shared-memory race condition, published in Microsoft’s Security Update Guide, that fixes how orphaned System V shared-memory segments are cleaned up when their attachment counter changes concurrently in the kernel’s ipc/shm code. The bug is small in patch size...
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    • cve 2026-52930 hybrid security linux kernel security wsl patching
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    • Forum: Security Alerts

  3. CVE-2026-53226 Rockchip GPIO Bug: IRQ Chip Leak, Use-After-Free Risk

    CVE-2026-53226 is a newly published Linux kernel vulnerability, added to NVD on June 25, 2026, in the Rockchip GPIO driver, where generic IRQ chip structures can leak during device removal and later trigger use-after-free crashes during kernel power-management callbacks. The bug is narrow, but...
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    • irq domain teardown linux kernel security rockchip gpio use-after-free crash
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    • Forum: Security Alerts

  4. CVE-2026-53183 MPTCP Kernel Bug: High DoS Risk via Receive Window Inflation

    CVE-2026-53183 is a newly published Linux kernel vulnerability, disclosed through kernel.org and added to NVD on June 25, 2026, that fixes an MPTCP receive-window accounting bug capable of letting incoming network traffic exceed the receiver’s configured buffer size. The issue carries a...
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    • denial of service linux kernel security mptcp vulnerability network receive window
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    • Forum: Security Alerts

  5. CVE-2026-53148 Thunderbolt Bug: Linux Memory Safety Risk for Windows Estates

    CVE-2026-53148 is a Linux kernel Thunderbolt vulnerability published on June 25, 2026, affecting the XDomain code path in drivers/thunderbolt/xdomain.c, where a malicious peer can make the kernel copy more response data than the allocated buffer can safely hold. It is not, on its face, a Windows...
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    • cve 2026 53148 linux kernel security thunderbolt xdomain windows patch hygiene
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    • Forum: Security Alerts

  6. CVE-2026-45850: Microsoft flags Linux IPVS IPv6 checksum flaw beyond Windows

    Microsoft has published CVE-2026-45850 in its Security Update Guide for a Linux kernel IPVS flaw, disclosed by kernel.org on May 27, 2026, in which IPv6 extension headers can make TCP, UDP, or SCTP checksum validation fail before IP Virtual Server rewrites traffic. The bug is not a Windows...
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    • cve 2026 45850 ipv6 extension headers ipvs load balancing linux kernel security
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    • Forum: Security Alerts

  7. CVE-2026-46323 GRO Zerocopy UAF: Why Windows Admins Should Patch Linux Kernels

    CVE-2026-46323 was published by NVD on June 9, 2026, after kernel.org assigned a Linux kernel networking flaw in Generic Receive Offload where zerocopy socket buffers could be merged incorrectly, creating a use-after-free risk in kernel memory handling. The bug is not a Windows vulnerability...
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    • gro zerocopy linux kernel security use-after-free wsl hyper-v
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    • Forum: Security Alerts

  8. CVE-2026-46319 Use-After-Free in Linux act_ct: Windows Hybrid Risk Guide

    Linux kernel maintainers have published CVE-2026-46319, a newly listed use-after-free flaw in the act_ct traffic-control connection-tracking action, after a race in flow-table lookup and reference acquisition was fixed across stable kernel branches on June 9, 2026. The bug is not a Windows...
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    • cve-2026-46319 linux kernel security network traffic control rcu race condition
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    • Forum: Security Alerts

  9. CVE-2026-43059 Linux Bluetooth Kernel UAF: Patch Guidance for Mixed Windows Estates

    CVE-2026-43059 is a high-severity Linux kernel Bluetooth management vulnerability, published by NVD on May 5, 2026 and modified on May 22, that can trigger list corruption and use-after-free behavior in affected kernels before patched stable releases. It is not a Windows Bluetooth flaw, but...
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    • bluetooth mgmt linux kernel security mixed os patching use-after-free
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    • Forum: Security Alerts

  10. CVE-2026-46121: Linux DAMON sysfs Use-After-Free and Patch Guidance for WSL & Containers

    CVE-2026-46121 is a Linux kernel use-after-free flaw published by NVD on May 28, 2026, affecting the DAMON sysfs schemes interface where concurrent reads and writes of memcg_path could race and expose freed memory. The bug is narrow, technical, and not yet scored by NVD, but it is also a useful...
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    • cve-2026-46121 damon sysfs linux kernel security patch management
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    • Forum: Security Alerts

  11. CVE-2026-46187 RSI Wi-Fi Use-After-Free Race: Kernel Shutdown Lifetime Fix

    CVE-2026-46187 is a newly published Linux kernel vulnerability, disclosed by kernel.org on May 28, 2026, that fixes a use-after-free race in the RSI Wi-Fi driver when a kernel thread exits itself before external shutdown code tries to stop it. The bug is narrow, driver-specific, and still...
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    • kernel patch management linux kernel security use-after-free wi-fi driver cve
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    • Forum: Security Alerts

  12. CVE-2026-46204 AMDGPU VCN 4 OOB Read: Patch Before CVSS Score Exists

    CVE-2026-46204 is a newly published Linux kernel vulnerability from kernel.org, disclosed by NVD on May 28, 2026, affecting AMDGPU VCN 4 command parsing in the drm/amdgpu driver and fixed by replacing unsafe indirect-buffer reads with a bounds-checked helper. The bug is not yet scored by NVD...
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    • amdgpu driver kernel patching linux kernel security vcn 4 vulnerability
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    • Forum: Security Alerts

  13. CVE-2026-46180 brcmfmac Use-After-Free: Patch Linux Broadcom Wi-Fi Watchdog Race

    CVE-2026-46180 is a newly published Linux kernel vulnerability disclosed by kernel.org and listed by NVD on May 28, 2026, affecting the Broadcom brcmfmac Wi-Fi driver through a potential use-after-free race while stopping a watchdog kernel task. It is not a Windows vulnerability, but it matters...
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    • broadcom brcmfmac linux kernel security use-after-free wi-fi driver patching
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    • Forum: Security Alerts

  14. CVE-2026-46160 Btrfs Bug: Directory Unlink Fails After Crash, Causes -EIO Mount Errors

    CVE-2026-46160, published by NVD on May 28, 2026, describes a Linux kernel Btrfs bug in which directory removal failed to update last_unlink_trans, allowing a narrow fsync-and-crash sequence to produce failed log replay and an -EIO mount error. This is not a remote-code-execution fire drill, and...
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    • btrfs filesystem crash recovery fsync power loss linux kernel security
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    • Forum: Security Alerts

  15. CVE-2026-46229: AMD KFD VRAM Not Cleared on Allocate—Linux GPU Risk

    CVE-2026-46229 is a newly published Linux kernel vulnerability, received by NVD from kernel.org on May 28, 2026, in which AMD’s KFD compute path could hand freshly allocated VRAM to userspace without first clearing stale contents from prior allocations. The bug sits at the uncomfortable...
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    • amdgpu kfd cve-2026-46229 linux kernel security rocm ai security
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  16. CVE-2026-46111 Linux Bluetooth UAF: Patch, Risk & What Windows Teams Should Do

    CVE-2026-46111 is a Linux kernel Bluetooth vulnerability published by NVD on May 28, 2026, after kernel.org assigned it to a use-after-free bug in hci_conn during create_big_sync handling for Bluetooth BIG synchronization. The flaw is not yet scored by NVD, which means administrators are staring...
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    • bluetooth le audio kernel patch management linux kernel security use-after-free
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    • Forum: Security Alerts

  17. CVE-2026-46199: AMDGPU VCN4 Out-of-Bounds Read Fix for Kernel Security

    CVE-2026-46199 is a newly published Linux kernel vulnerability, disclosed by kernel.org and listed by NVD on May 28, 2026, in the AMDGPU VCN4 video decode path, where insufficient bounds checking could allow out-of-bounds reads while parsing decoder messages. The practical headline is not that...
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    • amdgpu vcn4 bounds checking gpu driver vulnerability linux kernel security
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    • Forum: Security Alerts

  18. CVE-2026-46241: Linux Kernel Cleanup Bug in mpc52xx SPI Path

    CVE-2026-46241 is a Linux kernel vulnerability published by NVD on May 28, 2026, affecting the spi: mpc52xx controller path, where failed controller registration could leave interrupts active and create a possible use-after-free and resource leak. The flaw is not the kind of headline-grabbing...
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    • embedded linux updates linux kernel security spi controller bug use-after-free
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    • Forum: Security Alerts

  19. CVE-2026-46122: Fixes Broadcom b43 Wi‑Fi Out-of-Bounds Read in Linux Kernel

    CVE-2026-46122, published by NVD on May 28, 2026 after a kernel.org assignment, fixes an out-of-bounds read in the Linux kernel’s Broadcom b43 Wi-Fi driver by rejecting received frames that report an invalid firmware-controlled key index. The bug is narrow, hardware-specific, and still awaiting...
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    • b43 driver cve patching linux kernel security wi-fi driver bug
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    • Forum: Security Alerts

  20. CVE-2026-46123: Virtio Bluetooth Kernel Bug Exposes Unsafe Receive-Length Handling

    CVE-2026-46123 is a newly published Linux kernel vulnerability, received by NVD from kernel.org on May 28, 2026, that fixes unsafe receive-length handling in the virtio Bluetooth driver used by virtualized Linux systems. The bug is not a garden-variety desktop Bluetooth scare; it lives at the...
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    • cve-2026-46123 linux kernel security virtio bluetooth virtualization hardening
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    • Forum: Security Alerts