Critical severity · published Aug 15, 2026
CVE-2026-72200
ntfs: detect mapping-pairs LCN accumulator overflow
9.8
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 6626fb859f4c4772f2f59751d23937716e03f98f; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 7ffa8f3d30236e0ab897c30bdb01224ff1fe1c89; 1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 before 7fb64788812d137b37f6d8724e1e41c624c1e814; 1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 before ec4f061f2219e0f0c6465d56d0380bf749235a53; 2.6.12; 7.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-72200
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-72200
git.kernel.org
https://git.kernel.org/stable/c/6626fb859f4c4772f2f59751d23937716e03f98f
git.kernel.org
https://git.kernel.org/stable/c/7fb64788812d137b37f6d8724e1e41c624c1e814
git.kernel.org
https://git.kernel.org/stable/c/7ffa8f3d30236e0ab897c30bdb01224ff1fe1c89
git.kernel.org
https://git.kernel.org/stable/c/ec4f061f2219e0f0c6465d56d0380bf749235a53
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