CVE-2025-68784

Service interruption via stale XFS value pointer

Published Jan 13, 2026 · Updated Jan 13, 2026

Use-after-free in Linux Kernel 6.10.0 through 6.12.63 and 6.13.0 through 6.18.2 allows local users to interrupt service during XFS xattr repair. The repair path caches ab->value before xchk_setup_xattr_buf can allocate a replacement buffer, leaving the cached reference stale. Reachability requires local access able to invoke XFS extended-attribute repair; dereferencing the stale pointer can crash the kernel and interrupt the host.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux Kernel 6.10.0 through 6.12.63 and 6.13.0 through 6.18.2 allows local users to interrupt service during XFS xattr repair. The repair path caches ab->value before xchk_setup_xattr_buf can allocate a replacement buffer, leaving the cached reference stale. Reachability requires local access able to invoke XFS extended-attribute repair; dereferencing the stale pointer can crash the kernel and interrupt the host.

The record

CVE
CVE-2025-68784
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=6.10
  2. Affected versionversion=e47dcf113ae348678143cc935a1183059c02c9ad <1e2d3aa19c7962b9474b22893160cb460494c45f
  3. Affected versionversion=e47dcf113ae348678143cc935a1183059c02c9ad <5990fd756943836978ad184aac980e2b36ab7e01
  4. Affected versionversion=e47dcf113ae348678143cc935a1183059c02c9ad <d29ed9ff972afe17c215cab171761d7a15d7063f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.10; version=e47dcf113ae348678143cc935a1183059c02c9ad <1e2d3aa19c7962b9474b22893160cb460494c45f; version=e47dcf113ae348678143cc935a1183059c02c9ad <5990fd756943836978ad184aac980e2b36ab7e01; version=e47dcf113ae348678143cc935a1183059c02c9ad <d29ed9ff972afe17c215cab171761d7a15d7063f

Published CVSS scores

5.5OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7SUSECVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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