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CVE-2025-21815 – Linux Kernel Shift Out-of-Bounds Vulnerability

The following table lists the changes that have been made to the
CVE-2025-21815 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Feb. 27, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved:

    mm/compaction: fix UBSAN shift-out-of-bounds warning

    syzkaller reported a UBSAN shift-out-of-bounds warning of (1UL << order)
    in isolate_freepages_block(). The bogus compound_order can be any value
    because it is union with flags. Add back the MAX_PAGE_ORDER check to fix
    the warning.
    Added Reference https://git.kernel.org/stable/c/10b7d3eb535098ccd4c82a182a33655d8a0e5c88
    Added Reference https://git.kernel.org/stable/c/4491159774d973a9e2e998d25d8fbb20fada6dfa
    Added Reference https://git.kernel.org/stable/c/d1366e74342e75555af2648a2964deb2d5c92200
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