CVE-2025-71265 (GCVE-0-2025-71265)
Vulnerability from cvelistv5 – Published: 2026-03-18 10:05 – Updated: 2026-03-18 16:21
VLAI?
Title
fs: ntfs3: fix infinite loop in attr_load_runs_range on inconsistent metadata
Summary
In the Linux kernel, the following vulnerability has been resolved:
fs: ntfs3: fix infinite loop in attr_load_runs_range on inconsistent metadata
We found an infinite loop bug in the ntfs3 file system that can lead to a
Denial-of-Service (DoS) condition.
A malformed NTFS image can cause an infinite loop when an attribute header
indicates an empty run list, while directory entries reference it as
containing actual data. In NTFS, setting evcn=-1 with svcn=0 is a valid way
to represent an empty run list, and run_unpack() correctly handles this by
checking if evcn + 1 equals svcn and returning early without parsing any run
data. However, this creates a problem when there is metadata inconsistency,
where the attribute header claims to be empty (evcn=-1) but the caller
expects to read actual data. When run_unpack() immediately returns success
upon seeing this condition, it leaves the runs_tree uninitialized with
run->runs as a NULL. The calling function attr_load_runs_range() assumes
that a successful return means that the runs were loaded and sets clen to 0,
expecting the next run_lookup_entry() call to succeed. Because runs_tree
remains uninitialized, run_lookup_entry() continues to fail, and the loop
increments vcn by zero (vcn += 0), leading to an infinite loop.
This patch adds a retry counter to detect when run_lookup_entry() fails
consecutively after attr_load_runs_vcn(). If the run is still not found on
the second attempt, it indicates corrupted metadata and returns -EINVAL,
preventing the Denial-of-Service (DoS) vulnerability.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux |
Affected:
be71b5cba2e6485e8959da7a9f9a44461a1bb074 , < 6f07a590616ff5f57f7c041d98e463fad9e9f763
(git)
Affected: be71b5cba2e6485e8959da7a9f9a44461a1bb074 , < a89bc96d5abd8a4a8d5d911884ea347efcdf460b (git) Affected: be71b5cba2e6485e8959da7a9f9a44461a1bb074 , < af839013c70a24779f9d1afb1575952009312d38 (git) Affected: be71b5cba2e6485e8959da7a9f9a44461a1bb074 , < 78b61f7eac37a63284774b147f38dd0be6cad43c (git) Affected: be71b5cba2e6485e8959da7a9f9a44461a1bb074 , < c0b43c45d45f59e7faad48675a50231a210c379b (git) Affected: be71b5cba2e6485e8959da7a9f9a44461a1bb074 , < 3c3a6e951b9b53dab2ac460a655313cf04c4a10a (git) Affected: be71b5cba2e6485e8959da7a9f9a44461a1bb074 , < 4b90f16e4bb5607fb35e7802eb67874038da4640 (git) |
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|
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"dateReserved": "2026-03-17T09:08:18.457Z",
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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