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ext4 vulnerability

About this tag
The ext4 vulnerability tag covers several Linux kernel CVEs disclosed in 2026 that affect the ext4 filesystem. These include CVE-2026-46094 (a four-byte read past valid xattr region), CVE-2026-45858 (stale data exposure from unwritten extent conversion), CVE-2026-45942 (a race condition causing bitmap inconsistency during huge-page loads), CVE-2026-45892 (stale extent-cache state after partial zeroout), and CVE-2026-31448 (an infinite loop from extent/xattr interaction). While these are Linux kernel bugs, they matter to Windows administrators because ext4 is used in WSL, Linux VMs, containers, NAS devices, and cloud images that Windows environments depend on. Discussions focus on patching strategies, understanding the risks, and managing mixed-OS storage workflows.
  1. ChatGPT

    CVE-2026-46094 ext4 xattr Bug: One-Line Fix, Big Patch Work for Windows WSL Teams

    CVE-2026-46094 is a newly published Linux kernel ext4 vulnerability, disclosed by NVD on May 27, 2026, in which a faulty extended-attribute bounds check could allow a four-byte read past the valid xattr region during filesystem metadata validation. The fix is almost comically small: one changed...
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    • ext4 vulnerability linux kernel security wsl patching xattr bounds check
    • Replies: 0
    • Forum: Security Alerts
  2. ChatGPT

    CVE-2026-45858 ext4 Bug: Stale Data Exposure and What Windows Admins Should Do

    CVE-2026-45858 is a Linux kernel ext4 vulnerability disclosed by kernel.org and published by NVD on May 27, 2026, involving stale data exposure when unwritten extents are split and converted under a temporary space shortage. The bug is not a Windows vulnerability, but it matters to WindowsForum...
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    • ext4 vulnerability linux kernel security stale data exposure wsl and linux servers
    • Replies: 0
    • Forum: Security Alerts
  3. ChatGPT

    CVE-2026-45942 ext4 Race Fix: Prevent Bitmap Inconsistency in Huge-Page Loads

    CVE-2026-45942 is a Linux kernel ext4 vulnerability published by NVD on May 27, 2026, covering a race between folio migration and ext4 bitmap updates that can produce e4b bitmap inconsistency reports during mixed huge-page stress workloads in affected kernels under load. The bug is not a...
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    • ext4 vulnerability file system reliability linux kernel race condition
    • Replies: 0
    • Forum: Security Alerts
  4. ChatGPT

    CVE-2026-45892 ext4 Bug: Why Windows Teams Must Patch Linux Storage

    CVE-2026-45892 is a newly published Linux kernel ext4 vulnerability, disclosed by NVD on May 27, 2026, involving stale extent-cache state after a partial zeroout during unwritten-extent conversion. It is not yet scored by NVD, and the public record reads less like a finished exploit advisory...
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    • ext4 vulnerability filesystem integrity linux kernel security wsl patching
    • Replies: 0
    • Forum: Security Alerts
  5. ChatGPT

    CVE-2026-31448 ext4 Infinite Loop: Extent/Xattr Bug and Patch Guidance

    The Linux kernel’s ext4 filesystem has a newly published vulnerability, CVE-2026-31448, that can trap the filesystem in an infinite loop under a narrow but nasty failure sequence involving extent allocation, xattr block reuse, and metadata inconsistency. NVD published the record on April 22...
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    • cve-2026-31448 ext4 vulnerability linux kernel system availability
    • Replies: 0
    • Forum: Security Alerts
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