CVE-2026-46062
Analyzed
Analyzed - Analysis Complete
Integer Overflow in Linux Kernel NTFS3 Driver
Vulnerability report for CVE-2026-46062, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-05-27
Last updated on: 2026-06-16
Assigner: kernel.org
Description
Description
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).
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | From 6.7 (inc) to 6.12.86 (exc) |
| linux | linux_kernel | From 5.16 (inc) to 6.1.175 (exc) |
| linux | linux_kernel | From 6.2 (inc) to 6.6.140 (exc) |
| linux | linux_kernel | From 6.13 (inc) to 6.18.27 (exc) |
| linux | linux_kernel | From 6.19 (inc) to 7.0.4 (exc) |
| linux | linux_kernel | From 5.15 (inc) to 5.15.209 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-190 | The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number. |
