CVE-2026-89494Network attack vector

Node crash via unchecked DLM migration lengths

Published Sep 11, 2026 · Updated Sep 11, 2026

Out-of-bounds access in Linux OCFS2 allows remote attackers in a DLM domain to crash a node via a crafted migration message. dlm_process_recovery_data() trusts num_locks and reads beyond the copied payload, while dlm_init_lockres() copies an unchecked lockname_len into a 32-byte object. Any peer node in the domain can reach both paths; the documented read triggers a kernel panic, while the write corrupts heap memory.

CVSS severityUnavailable
Unscored
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in Linux OCFS2 allows remote attackers in a DLM domain to crash a node via a crafted migration message. dlm_process_recovery_data() trusts num_locks and reads beyond the copied payload, while dlm_init_lockres() copies an unchecked lockname_len into a 32-byte object. Any peer node in the domain can reach both paths; the documented read triggers a kernel panic, while the write corrupts heap memory.

The record

CVE
CVE-2026-89494
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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=2.6.16
  2. Affected versionversion=6714d8e86bf443f6f7af50f9d432025649f091f5 <50c4cc9183e11f83427efbf770f54851f4471c02
  3. Affected versionversion=6714d8e86bf443f6f7af50f9d432025649f091f5 <a8facb1670b4a0612183198e758d9539ef628ed9
  4. Affected versionversion=6714d8e86bf443f6f7af50f9d432025649f091f5 <b54e03d9b3697d25f4a0063cf717d459c5e3ad94
  5. Affected versionversion=6714d8e86bf443f6f7af50f9d432025649f091f5 <f33041906885f96e190cde54e61ddc69de39e3ee

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.16; version=6714d8e86bf443f6f7af50f9d432025649f091f5 <50c4cc9183e11f83427efbf770f54851f4471c02; version=6714d8e86bf443f6f7af50f9d432025649f091f5 <a8facb1670b4a0612183198e758d9539ef628ed9; version=6714d8e86bf443f6f7af50f9d432025649f091f5 <b54e03d9b3697d25f4a0063cf717d459c5e3ad94; version=6714d8e86bf443f6f7af50f9d432025649f091f5 <f33041906885f96e190cde54e61ddc69de39e3ee

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.

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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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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