CVE-2026-72164 (GCVE-0-2026-72164)
Vulnerability from cvelistv5 – Published: 2026-08-15 05:53 – Updated: 2026-10-16 18:44
VLAI
EPSS
VEX
Title
ocfs2: avoid moving extents to occupied clusters
Summary
In the Linux kernel, the following vulnerability has been resolved:
ocfs2: avoid moving extents to occupied clusters
For non-auto OCFS2_IOC_MOVE_EXT operations, userspace supplies a physical
me_goal. ocfs2_move_extent() initializes new_phys_cpos from that goal and
expects ocfs2_probe_alloc_group() to replace it with a free run in the
target block group.
The probe currently leaves *phys_cpos unchanged if the scan reaches the
end of the group without finding a free run. An occupied goal at the last
bit can therefore survive the probe and be passed to
__ocfs2_move_extent(), which copies file data into a cluster still owned
by another inode before the bitmap is updated.
When the probe does find a free run, it also subtracts move_len from the
ending bit. The start of an N-bit run ending at i is i - N + 1, so the
current calculation can report the bit immediately before the free run.
Clear *phys_cpos before scanning and use the correct free-run start.
Callers already treat a zero result as -ENOSPC, so failed probes no longer
continue with an occupied caller-controlled goal.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 18:43 UTC
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
e6b5859cccfa0fec02f3c5b1069481efc7186f47 , < 3112afebf2a76e522fbaabcbb0c47aafbdc35932
(git)
Affected: e6b5859cccfa0fec02f3c5b1069481efc7186f47 , < 35486b291b8fbde6c4d0b1c79e565c6260d3329d (git) Affected: e6b5859cccfa0fec02f3c5b1069481efc7186f47 , < 19f7b04924b20b81dabbeed19d5542792ba5b6d6 (git) Affected: e6b5859cccfa0fec02f3c5b1069481efc7186f47 , < e281d892ce5870a50fdc718cb3bfc3dd5b62c728 (git) Affected: e6b5859cccfa0fec02f3c5b1069481efc7186f47 , < 0d0c5c17b18bdbc592ac26ab4d1de7e3dbf9be1e (git) Affected: e6b5859cccfa0fec02f3c5b1069481efc7186f47 , < d5d5a21fb33cd9b963aea99da81e4dacd452cd95 (git) Affected: e6b5859cccfa0fec02f3c5b1069481efc7186f47 , < 4d1953d3aeb4a7f6623083e1839068ee1c157db2 (git) Affected: e6b5859cccfa0fec02f3c5b1069481efc7186f47 , < 22920541c35a9f23f219038ba5874c843a7c4419 (git) |
guessed | |
| Linux | Linux |
Affected:
3.0
Unaffected: 0 , < 3.0 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
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},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-18T14:32:52+00:00",
"cve": "CVE-2026-72164",
"id": "CVE-2026-72164",
"initial_release_date": "2026-08-15T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: ocfs2: avoid moving extents to occupied clusters",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72164.json",
"version": "3"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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
| Author | Source | Type | Date | Other |
|---|
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.