ntfs: detect mapping-pairs LCN accumulator overflow (CVE-2026-72200) | HOL Guard CVE

Critical · CVSS 9.8CVE-2026-72200

ntfs: detect mapping-pairs LCN accumulator overflow

Answer in brief

CVE-2026-72200 records a Critical severity (CVSS 9.8) vulnerability in ntfs: detect mapping-pairs LCN accumulator overflow. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 15, 2026Updated Aug 19, 2026Source checked Sep 29, 2026First seen by HOL Aug 15, 2026Material review Aug 19, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.8
Exploitation: Not marked as known exploited
Affected software: 5 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7fb64788812d137b37f6d8724e1e41c624c1e814 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ec4f061f2219e0f0c6465d56d0380bf749235a53 \|\| >=0 <7.1.5	7fb64788812d137b37f6d8724e1e41c624c1e814, ec4f061f2219e0f0c6465d56d0380bf749235a53, 7.1.5
Linux/Linuxgeneric	>=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7fb64788812d137b37f6d8724e1e41c624c1e814 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ec4f061f2219e0f0c6465d56d0380bf749235a53	7fb64788812d137b37f6d8724e1e41c624c1e814, ec4f061f2219e0f0c6465d56d0380bf749235a53
Linux/Linuxgeneric	2.6.12	Not reported
Linux/Linuxgeneric	>=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7ffa8f3d30236e0ab897c30bdb01224ff1fe1c89 \|\| >=1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 <7fb64788812d137b37f6d8724e1e41c624c1e814 \|\| >=1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 <ec4f061f2219e0f0c6465d56d0380bf749235a53	7ffa8f3d30236e0ab897c30bdb01224ff1fe1c89, 7fb64788812d137b37f6d8724e1e41c624c1e814, ec4f061f2219e0f0c6465d56d0380bf749235a53
Linux/Linuxgeneric	2.6.12 \|\| 7.1	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 7fb64788812d137b37f6d8724e1e41c624c1e814; Linux/Linux to 7fb64788812d137b37f6d8724e1e41c624c1e814; Linux/Linux to 7ffa8f3d30236e0ab897c30bdb01224ff1fe1c89 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 15, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: ntfs: detect mapping-pairs LCN accumulator overflow The NTFS mapping-pairs parser accumulates relative LCN deltas in a signed integer. A corrupted attribute can drive that addition past the representable range. One corrupt runlist shape sets the accumulated LCN to S64_MAX and then adds a delta of 1 in the next mapping-pairs entry. Signed overflow is undefined and can turn an invalid runlist into a different set of physical clusters. Check the LCN addition for overflow before storing the next run.

Quoted source text, attributed separately from HOL analysis.