CVE-2025-71265 (GCVE-0-2025-71265)

Vulnerability from cvelistv5 – Published: 2026-03-18 10:05 – Updated: 2026-05-11 21:57
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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Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.



Detection rules are retrieved from Rulezet.