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NVD / CVE Program· CNA Linux

CVE-2026-72164: ocfs2: avoid moving extents to occupied clusters

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 0d0c5c17b18bdbc592ac26ab4d1de7e3dbf9be1e, 19f7b04924b20b81dabbeed19d5542792ba5b6d6, 22920541c35a9f23f219038ba5874c843a7c4419.

Low priority for now. Upgrade to Linux Linux 0d0c5c17b18bdbc592ac26ab4d1de7e3dbf9be1e, 19f7b04924b20b81dabbeed19d5542792ba5b6d6, 22920541c35a9f23f219038ba5874c843a7c4419 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Follow CVE-2026-72164

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.0affected
    • e6b5859cccfa0fec02f3c5b1069481efc7186f47 and later · before 3112afebf2a76e522fbaabcbb0c47aafbdc35932affected · git
    • e6b5859cccfa0fec02f3c5b1069481efc7186f47 and later · before 35486b291b8fbde6c4d0b1c79e565c6260d3329daffected · git
    • e6b5859cccfa0fec02f3c5b1069481efc7186f47 and later · before 19f7b04924b20b81dabbeed19d5542792ba5b6d6affected · git
    • e6b5859cccfa0fec02f3c5b1069481efc7186f47 and later · before e281d892ce5870a50fdc718cb3bfc3dd5b62c728affected · git
    • e6b5859cccfa0fec02f3c5b1069481efc7186f47 and later · before 0d0c5c17b18bdbc592ac26ab4d1de7e3dbf9be1eaffected · git
    • e6b5859cccfa0fec02f3c5b1069481efc7186f47 and later · before d5d5a21fb33cd9b963aea99da81e4dacd452cd95affected · git
    • e6b5859cccfa0fec02f3c5b1069481efc7186f47 and later · before 4d1953d3aeb4a7f6623083e1839068ee1c157db2affected · git
    • e6b5859cccfa0fec02f3c5b1069481efc7186f47 and later · before 22920541c35a9f23f219038ba5874c843a7c4419affected · git
    • before 3.0not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-72160Aug 15, 2026 · ocfs2: reject dinodes with non-canonical i_mode type
    35Monitor
  • ← EarlierCVE-2026-72162Aug 15, 2026 · ocfs2: fix UBSAN array-index-out-of-bounds in ocfs2_sum_rightmost_rec
    31Monitor
  • Later →CVE-2026-72165Aug 15, 2026 · mtd: rawnand: fix condition in 'nand_select_target()'
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux0d0c5c17b18bdbc592ac26ab4d1de7e3dbf9be1eVendor (CNA)
Linux Linux19f7b04924b20b81dabbeed19d5542792ba5b6d6Vendor (CNA)
Linux Linux22920541c35a9f23f219038ba5874c843a7c4419Vendor (CNA)
Linux Linux3112afebf2a76e522fbaabcbb0c47aafbdc35932Vendor (CNA)
Linux Linux35486b291b8fbde6c4d0b1c79e565c6260d3329dVendor (CNA)
Linux Linux4d1953d3aeb4a7f6623083e1839068ee1c157db2Vendor (CNA)
Linux Linuxd5d5a21fb33cd9b963aea99da81e4dacd452cd95Vendor (CNA)
Linux Linuxe281d892ce5870a50fdc718cb3bfc3dd5b62c728Vendor (CNA)
debian:linux6.1.180-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records