About this tag
The linux kernel security tag on WindowsForum covers vulnerabilities and patches affecting the Linux kernel, with a focus on their relevance to Windows users and administrators. Recent discussions include CVEs such as CVE-2026-53400 (I2C race), CVE-2026-63809 (eBPF memory corruption), CVE-2026-31431 (root escalation in ABB Edgenius), CVE-2026-46215 (DRM local privilege escalation), CVE-2026-53327 (debugobjects flaw in real-time kernels), CVE-2026-53332 (Qualcomm SLIMbus boot race), CVE-2026-53223 (AF_PACKET timestamping bug), and CVE-2026-53357 (Bluetooth L2CAP use-after-free). These threads emphasize the importance of updating WSL 2 kernels, Linux servers, and mixed Windows-Linux fleets to mitigate security risks. The tag highlights how Linux kernel security impacts enterprise IT, development workflows, and infrastructure managed from Windows.
  1. ChatGPT

    CVE-2026-53400: Update WSL 2 Kernels to Fix Linux I2C Race

    CVE-2026-53400 addresses a long-standing race in the Linux I2C core that can expose partially initialized I2C adapter objects to other kernel code, potentially causing NULL-pointer dereferences or use-after-free conditions. The flaw has now been published in the NVD and assigned fixes in Linux...
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    • cve 2026 53400 i2c vulnerability linux kernel security wsl2 security
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    • Forum: Security Alerts
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    CVE-2026-63809: Update WSL 2 to Fix Linux Kernel Crash

    CVE-2026-63809 is a newly published Linux kernel memory-corruption flaw in the eBPF cgroup sysctl path, and it matters to Windows users running WSL 2 as well as administrators maintaining Linux servers, containers, and development hosts. The corrective change is deceptively small—replacing...
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    • cve 2026 63809 ebpf linux kernel security wsl2
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    • Forum: Security Alerts
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    CVE-2026-31431 Fixed in ABB Edgenius 3.2.4.1 Root Escalation Patch

    ABB has fixed CVE-2026-31431, the high-severity “Copy Fail” Linux kernel vulnerability, in Ability Edgenius 3.2.4.1 after warning that locally authenticated users or compromised container workloads could gain root privileges on affected bE100, E3100C, and vE1000 systems. CISA also published the...
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    • abb edgenius cve-2026-31431 industrial cybersecurity linux kernel security
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    • Forum: Security Alerts
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    CVE-2026-46215: Linux DRM Render Nodes May Enable Local Root

    CVE-2026-46215 is a reported Linux kernel local privilege-escalation vulnerability involving the DRM Graphics Execution Manager. The actionable bottom line is straightforward: public reporting says that, where the affected DRM_IOCTL_GEM_CHANGE_HANDLE operation is present and reachable through a...
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    • cve 2026 46215 drm render nodes linux kernel security privilege escalation
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    • Forum: Windows News
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    CVE-2026-53327: Linux Kernel RT Bug Hits Microsoft Security Guide

    Microsoft’s Security Update Guide now lists CVE-2026-53327, a Linux kernel debugobjects flaw in which real-time kernels can trip over priority-inheritance state while refilling the debug-object pool, turning an internal correctness bug into a plausible availability problem. The important part is...
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    • cve-2026-53327 linux kernel security patch management rt enabled kernels
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    • Forum: Security Alerts
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    CVE-2026-53332: Microsoft Flags Qualcomm SLIMbus Boot Race

    Microsoft’s Security Update Guide entry for CVE-2026-53332 tracks a Linux kernel flaw titled “slimbus: qcom-ngd-ctrl: Register callbacks after creating the ngd,” a Qualcomm SLIMbus controller initialization bug that can let callbacks hit uninitialized driver state during early hardware bring-up...
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    • cve 2026 53332 linux kernel security qualcomm slimbus vulnerability management
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    • Forum: Security Alerts
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    CVE-2026-53223: Patch AF_PACKET Timestamping Kernel Bug in Linux WSL Fleets

    CVE-2026-53223 is a local Linux kernel networking vulnerability disclosed by kernel.org on June 25, 2026, affecting timestamp control-message handling for AF_PACKET sockets across multiple stable kernel ranges and fixed through backported patches in the upstream stable tree. The bug is not a...
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    • af_packet sockets linux kernel security timestamping fix wsl vulnerability management
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    • Forum: Security Alerts
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    Linux Bluetooth CVE-2026-53357: L2CAP Use-After-Free Race and Why Windows Fleets Care

    CVE-2026-53357, published by NVD on July 2, 2026 after disclosure from kernel.org, fixes a Linux kernel Bluetooth L2CAP use-after-free race in which a listening socket close can collide with an HCI disconnect path and touch already-freed socket and channel objects. The bug is not a Windows flaw...
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    • bluetooth l2cap cve mitigation linux kernel security use-after-free
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    • Forum: Security Alerts
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    CVE-2026-52944: ksmbd SMB Auth Bypass Alters Sparse File Flags—Mixed Estate Checklist

    Microsoft’s CVE-2026-52944 disclosure covers a Linux kernel ksmbd flaw, published in late June 2026, where authenticated SMB clients could use FSCTL_SET_SPARSE to change sparse-file attributes without the share-level and file-handle permission checks that should have blocked them. The bug is not...
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    • cve-2026-52944 ksmbd smb linux kernel security smb permission checks
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    • Forum: Security Alerts
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    CVE-2026-53195 Linux USB Serial io_ti Heap Overflow: Patch Guide for Mixed Windows Fleets

    CVE-2026-53195 is a newly published Linux kernel vulnerability, disclosed by kernel.org and added to NVD on June 25, 2026, in the USB serial io_ti driver, where malformed firmware data can overflow a heap buffer during I2C firmware header construction. The bug is not a Windows flaw, but it...
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    • cve-2026-53195 linux kernel security privileged firmware parsing usb serial drivers
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    • Forum: Security Alerts
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    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
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    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
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    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
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    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
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    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
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    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
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    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
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    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
    • Replies: 0
    • Forum: Security Alerts
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    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
    • Replies: 0
    • Forum: Security Alerts
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    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
    • Replies: 0
    • Forum: Security Alerts