CVE-2024-27435

Storage outage via reserved-tag deadlock

Published May 17, 2024 · Updated Aug 5, 2026

Improper locking in the Linux kernel's NVMe-over-RDMA initiator from 5.12 allows local users to block admin-queue reconnection. During controller reset, a keep-alive request retains the sole reserved admin-queue tag while the shared fabric queue needs that tag for its connect command. Reaching the flaw requires local low-privileged access and an active NVMe-over-RDMA setup; affected storage remains disconnected indefinitely.

CVSS severity5.5
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the Linux kernel's NVMe-over-RDMA initiator from 5.12 allows local users to block admin-queue reconnection. During controller reset, a keep-alive request retains the sole reserved admin-queue tag while the shared fabric queue needs that tag for its connect command. Reaching the flaw requires local low-privileged access and an active NVMe-over-RDMA setup; affected storage remains disconnected indefinitely.

The record

CVE
CVE-2024-27435
Published
May 17, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=5.12
  2. Affected versionversion=ed01fee283a067c72b2d6500046080dbc1bb9dae <149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8
  3. Affected versionversion=ed01fee283a067c72b2d6500046080dbc1bb9dae <262da920896e2f2ab0e3947d9dbee0aa09045818
  4. Affected versionversion=ed01fee283a067c72b2d6500046080dbc1bb9dae <6851778504cdb49431809b4ba061903d5f592c96
  5. Affected versionversion=ed01fee283a067c72b2d6500046080dbc1bb9dae <de105068fead55ed5c07ade75e9c8e7f86a00d1d
  6. Affected versionversion=ed01fee283a067c72b2d6500046080dbc1bb9dae <ff2f90f88d78559802466ad1c84ac5bda4416b3a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.12; version=ed01fee283a067c72b2d6500046080dbc1bb9dae <149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8; version=ed01fee283a067c72b2d6500046080dbc1bb9dae <262da920896e2f2ab0e3947d9dbee0aa09045818; version=ed01fee283a067c72b2d6500046080dbc1bb9dae <6851778504cdb49431809b4ba061903d5f592c96; version=ed01fee283a067c72b2d6500046080dbc1bb9dae <de105068fead55ed5c07ade75e9c8e7f86a00d1d; version=ed01fee283a067c72b2d6500046080dbc1bb9dae <ff2f90f88d78559802466ad1c84ac5bda4416b3a

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Canonical UbuntuCVSS: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

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking
T1499.004Application or System Exploitation

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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