CVE-2026-23306

Kernel memory corruption via erroneous ENODEV return

Published Mar 25, 2026 · Updated Mar 25, 2026

Use-after-free in Linux Kernel 5.18 through 7.0-rc1 allows attackers to corrupt kernel memory during pm8001 device removal. pm8001_queue_command() calls task_done(), freeing the SAS task, but returns -ENODEV; sas_ata_qc_issue() treats the task as unhandled and frees it again. The trigger requires root access to the driver's sysfs delete attribute or physical device removal, so ordinary unprivileged local activity does not reach the faulty path.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in Linux Kernel 5.18 through 7.0-rc1 allows attackers to corrupt kernel memory during pm8001 device removal. pm8001_queue_command() calls task_done(), freeing the SAS task, but returns -ENODEV; sas_ata_qc_issue() treats the task as unhandled and frees it again. The trigger requires root access to the driver's sysfs delete attribute or physical device removal, so ordinary unprivileged local activity does not reach the faulty path.

The record

CVE
CVE-2026-23306
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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=5.18
  2. Affected versionversion=e29c47fe8946cc732b0e0d393b65b13c84bb69d0 <227ff4af00abc40b95123cc27ee8079069dcd8d7
  3. Affected versionversion=e29c47fe8946cc732b0e0d393b65b13c84bb69d0 <38353c26db28efd984f51d426eac2396d299cca7
  4. Affected versionversion=e29c47fe8946cc732b0e0d393b65b13c84bb69d0 <824a7672e3540962d5c77d4c6666254d7aa6f0b3
  5. Affected versionversion=e29c47fe8946cc732b0e0d393b65b13c84bb69d0 <8b00427317ba7b7ec91252b034009f638d0f311b
  6. Affected versionversion=e29c47fe8946cc732b0e0d393b65b13c84bb69d0 <c5dc39f8ae055520fd778b7fb0423f11586f15c4
  7. Affected versionversion=e29c47fe8946cc732b0e0d393b65b13c84bb69d0 <ebbb852ffbc952b95ddb7e3872b67b3e74c6da47

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.18; version=e29c47fe8946cc732b0e0d393b65b13c84bb69d0 <227ff4af00abc40b95123cc27ee8079069dcd8d7; version=e29c47fe8946cc732b0e0d393b65b13c84bb69d0 <38353c26db28efd984f51d426eac2396d299cca7; version=e29c47fe8946cc732b0e0d393b65b13c84bb69d0 <824a7672e3540962d5c77d4c6666254d7aa6f0b3; version=e29c47fe8946cc732b0e0d393b65b13c84bb69d0 <8b00427317ba7b7ec91252b034009f638d0f311b; version=e29c47fe8946cc732b0e0d393b65b13c84bb69d0 <c5dc39f8ae055520fd778b7fb0423f11586f15c4; version=e29c47fe8946cc732b0e0d393b65b13c84bb69d0 <ebbb852ffbc952b95ddb7e3872b67b3e74c6da47

Published CVSS scores

7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo