7.8

CVE-2026-46062: ntfs3: fix integer overflow in run_unpack() volume boundary check

Analyzed
AliasesUBUNTU-CVE-2026-46062DEBIAN-CVE-2026-46062
Published 27-05-2026Last modified 05-08-2026

Vulnerability summary

CVE-2026-46062 is a high (CVSS 7.8) Integer Overflow or Wraparound vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.14%
0%100%
Low · -0.05 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 34 · Related 34
OPENSUSE-SU-2026:10954-1USN-8488-1USN-8488-2USN-8489-1USN-8507-1USN-8567-1

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

Decrease -0.05 pp

From 0.20% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu147 products
  • linux< 5.15.0-186.196 | < 6.8.0-136.136 | All versions (No fix recorded) | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1061.64 | All versions (No fix recorded) | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 82cae269cfa953032fbb8980a7d554d60fb00b17, < 424858f9a048057bb8f834bfe03d18f5e477e747 | ≥ 82cae269cfa953032fbb8980a7d554d60fb00b17, < e73cd5aed6b15e55c1c47577bdb473b5e88d6a69 | ≥ 82cae269cfa953032fbb8980a7d554d60fb00b17, < a954061b334ec67c79ae9d0cadd83fa521396487 | ≥ 82cae269cfa953032fbb8980a7d554d60fb00b17, < 60dab3e2931f3d792438a77a6cb0cb731c43300b | ≥ 82cae269cfa953032fbb8980a7d554d60fb00b17, < f1af27cec07a9fd0847166bdb23c99e86b05bfdc | ≥ 82cae269cfa953032fbb8980a7d554d60fb00b17, < 6175d09c23bec4b60860ee9a0170308ff4b56e10 | ≥ 82cae269cfa953032fbb8980a7d554d60fb00b17, < 984a415f019536ea2d24de9010744e5302a9a948 | 5.15
  • linux_kernel≥ 5.15, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.140 | ≥ 6.7, < 6.12.86 | ≥ 6.13, < 6.18.27 | ≥ 6.19, < 7.0.4
Debian1 product
  • linux< 6.1.176-1 | < 6.12.86-1 | < 7.0.4-1

3 vendors · 150 products

References

45 links
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