CVE-2025-68741Network attack vector

Kernel memory corruption via improper pooled-item free

Published Dec 24, 2025 · Updated Dec 24, 2025

Memory corruption in the Linux kernel's qla2xxx SCSI driver from 6.6 allows remote attackers to corrupt kernel memory through PURLS handling. The qla2xxx_process_purls_iocb() error path passes an item from qla24xx_alloc_purex_item() to kfree(), even when the item came from a per-adapter preallocated pool rather than kzalloc(). Exposure requires a qla2xxx adapter, a small pooled allocation, and the error path; the documented consequence is kernel-memory corruption.

CVSS severity9.8
Critical
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the Linux kernel's qla2xxx SCSI driver from 6.6 allows remote attackers to corrupt kernel memory through PURLS handling. The qla2xxx_process_purls_iocb() error path passes an item from qla24xx_alloc_purex_item() to kfree(), even when the item came from a per-adapter preallocated pool rather than kzalloc(). Exposure requires a qla2xxx adapter, a small pooled allocation, and the error path; the documented consequence is kernel-memory corruption.

The record

CVE
CVE-2025-68741
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2025Record 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=6.6
  2. Affected versionversion=875386b98857822b77ac7f95bdf367b70af5b78c <5fa1c8226b4532ad7011d295d3ab4ad45df105ae
  3. Affected versionversion=875386b98857822b77ac7f95bdf367b70af5b78c <78b1a242fe612a755f2158fd206ee6bb577d18ca
  4. Affected versionversion=875386b98857822b77ac7f95bdf367b70af5b78c <8e9f0a0717ba31d5842721627ade1e62d7aec012
  5. Affected versionversion=875386b98857822b77ac7f95bdf367b70af5b78c <cfe3e2f768d248fd3d965d561d0768a56dd0b9f8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.6; version=875386b98857822b77ac7f95bdf367b70af5b78c <5fa1c8226b4532ad7011d295d3ab4ad45df105ae; version=875386b98857822b77ac7f95bdf367b70af5b78c <78b1a242fe612a755f2158fd206ee6bb577d18ca; version=875386b98857822b77ac7f95bdf367b70af5b78c <8e9f0a0717ba31d5842721627ade1e62d7aec012; version=875386b98857822b77ac7f95bdf367b70af5b78c <cfe3e2f768d248fd3d965d561d0768a56dd0b9f8

Published CVSS scores

9.8Linux kernel CVE teamCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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