CVE-2026-98082

Kernel memory leak via unreleased btrfs I/O contexts

Published Sep 25, 2026 · Updated Sep 25, 2026

Memory leak in the btrfs RAID stripe tree in Linux 6.6.130 through 6.7 retains kernel memory when ordered-extent I/O fails. btrfs_insert_raid_extent returns after btrfs_insert_one_raid_extent fails without freeing remaining I/O contexts, while the ordered-extent I/O-error path skips cleanup entirely. Reachability requires a btrfs filesystem using the RAID stripe tree and either an insertion failure or an ordered-extent I/O error; the documented consequence is retained kernel memory.

CVSS severityUnavailable
Unscored
EPSS probability0.12%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the btrfs RAID stripe tree in Linux 6.6.130 through 6.7 retains kernel memory when ordered-extent I/O fails. btrfs_insert_raid_extent returns after btrfs_insert_one_raid_extent fails without freeing remaining I/O contexts, while the ordered-extent I/O-error path skips cleanup entirely. Reachability requires a btrfs filesystem using the RAID stripe tree and either an insertion failure or an ordered-extent I/O error; the documented consequence is retained kernel memory.

The record

CVE
CVE-2026-98082
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=02c372e1f016e5113217597ab37b399c4e407477 <1b4d4e890c2c85d0f6365b5a08c48b4bbf85deb0
  2. Affected versionversion=02c372e1f016e5113217597ab37b399c4e407477 <83f0c973cffb184d019390ffdb5d31de5c85bc61
  3. Affected versionversion=02c372e1f016e5113217597ab37b399c4e407477 <afbe73778338e6d1ac8c4486fbdf33f0cc1f2624
  4. Affected versionversion=02c372e1f016e5113217597ab37b399c4e407477 <bb4da45766d16503821f167054db76b735d89e94
  5. Affected versionversion=6.6.130 <6.7
  6. Affected versionversion=6.7
  7. Affected versionversion=ab69bf6f8970c09d3735c25094e9471d54365282

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=02c372e1f016e5113217597ab37b399c4e407477 <1b4d4e890c2c85d0f6365b5a08c48b4bbf85deb0; version=02c372e1f016e5113217597ab37b399c4e407477 <83f0c973cffb184d019390ffdb5d31de5c85bc61; version=02c372e1f016e5113217597ab37b399c4e407477 <afbe73778338e6d1ac8c4486fbdf33f0cc1f2624; version=02c372e1f016e5113217597ab37b399c4e407477 <bb4da45766d16503821f167054db76b735d89e94; version=6.6.130 <6.7; version=6.7; version=ab69bf6f8970c09d3735c25094e9471d54365282

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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