CVE-2026-23454

Kernel crash via unsynchronized MANA channel teardown

Published Apr 3, 2026 · Updated Apr 3, 2026

Use-after-free in the MANA network driver allows local users to crash the Linux kernel during hardware-channel teardown. mana_hwc_destroy_channel() frees hwc->caller_ctx before destroying the completion and event queues, while an in-flight interrupt can still dereference that context in mana_hwc_handle_resp(). The race is confined to systems using MANA hardware and requires channel teardown concurrent with an in-flight completion interrupt; a NULL dereference can crash the kernel.

CVSS severity7.0
High
EPSS probability0.12%
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 the MANA network driver allows local users to crash the Linux kernel during hardware-channel teardown. mana_hwc_destroy_channel() frees hwc->caller_ctx before destroying the completion and event queues, while an in-flight interrupt can still dereference that context in mana_hwc_handle_resp(). The race is confined to systems using MANA hardware and requires channel teardown concurrent with an in-flight completion interrupt; a NULL dereference can crash the kernel.

The record

CVE
CVE-2026-23454
Published
Apr 3, 2026
Updated
Apr 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 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=5.13
  2. Affected versionversion=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <05d345719d85b927cba74afac4d5322de3aa4256
  3. Affected versionversion=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <249e905571583a434d4ea8d6f92ccc0eef337115
  4. Affected versionversion=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <2b001901f689021acd7bf2dceed74a1bdcaaa1f9
  5. Affected versionversion=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <afdb1533eb9c05432aeb793a7280fa827c502f5c
  6. Affected versionversion=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <e23bf444512cb85d76012080a76cd1f9e967448e
  7. Affected versionversion=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <fa103fc8f56954a60699a29215cb713448a39e87

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.13; version=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <05d345719d85b927cba74afac4d5322de3aa4256; version=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <249e905571583a434d4ea8d6f92ccc0eef337115; version=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <2b001901f689021acd7bf2dceed74a1bdcaaa1f9; version=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <afdb1533eb9c05432aeb793a7280fa827c502f5c; version=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <e23bf444512cb85d76012080a76cd1f9e967448e; version=ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f <fa103fc8f56954a60699a29215cb713448a39e87

Published CVSS scores

7.0UbuntuCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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
T1499Endpoint Denial of Service

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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