Bug 2482150 (CVE-2026-46062) - CVE-2026-46062 kernel: ntfs3: fix integer overflow in run_unpack() volume boundary check
Summary: CVE-2026-46062 kernel: ntfs3: fix integer overflow in run_unpack() volume bou...
Keywords:
Status: NEW
Alias: CVE-2026-46062
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-27 15:13 UTC by OSIDB Bzimport
Modified: 2026-05-27 18:38 UTC (History)
2 users (show)

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Description OSIDB Bzimport 2026-05-27 15:13:46 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ntfs3: fix integer overflow in run_unpack() volume boundary check

The volume boundary check `lcn + len > sbi->used.bitmap.nbits` uses raw
addition which can wrap around for large lcn and len values, bypassing
the validation.  Use check_add_overflow() as is already done for the
adjacent prev_lcn + dlcn and vcn64 + len checks added by commit
3ac37e100385 ("ntfs3: Fix integer overflow in run_unpack()").

Found by fuzzing with a source-patched harness (LibAFL + QEMU).
Comment 1 Keith Grant 2026-05-27 18:36:58 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052756-CVE-2026-46062-35ef@gregkh/T
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