CVE-2024-26873

Service hang via hisi_sas semaphore deadlock

Published Apr 17, 2024 · Updated May 11, 2026

Improper locking in the Linux kernel hisi_sas driver in 6.7 allows local users to hang controller recovery during an ECC fault. The offline path holds the hisi_hba semaphore while ABORT_DEV times out and starts an automatic dump; reset and dump paths then wait in a lock cycle. Exploitation requires local low-privileged access, a PHY-disable operation, and a simultaneous double-bit ECC error on a HiSilicon SAS controller, resulting in hung kernel workqueues and blocked controller recovery.

CVSS severity5.5
Medium
EPSS probability0.17%
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 hisi_sas driver in 6.7 allows local users to hang controller recovery during an ECC fault. The offline path holds the hisi_hba semaphore while ABORT_DEV times out and starts an automatic dump; reset and dump paths then wait in a lock cycle. Exploitation requires local low-privileged access, a PHY-disable operation, and a simultaneous double-bit ECC error on a HiSilicon SAS controller, resulting in hung kernel workqueues and blocked controller recovery.

The record

CVE
CVE-2024-26873
Published
Apr 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 2024CVE publishedPublication date reported by the CVE source.
  2. May 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=2ff07b5c6fe9173e7a7de3b23f300d71ad4d8fde <3c4f53b2c341ec6428b98cb51a89a09b025d0953
  2. Affected versionversion=2ff07b5c6fe9173e7a7de3b23f300d71ad4d8fde <85c98073ffcfe9e46abfb9c66f3364467119d563
  3. Affected versionversion=2ff07b5c6fe9173e7a7de3b23f300d71ad4d8fde <e022dd3b875315a2d2001a512e98d1dc8c991f4a
  4. Affected versionversion=6.7
  5. Affected versionversion=91e035e98fa1383ca90d774c29bb14c3c5ed2d8c <a47f0b03149af538af4442ff0702eac430ace1cb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2ff07b5c6fe9173e7a7de3b23f300d71ad4d8fde <3c4f53b2c341ec6428b98cb51a89a09b025d0953; version=2ff07b5c6fe9173e7a7de3b23f300d71ad4d8fde <85c98073ffcfe9e46abfb9c66f3364467119d563; version=2ff07b5c6fe9173e7a7de3b23f300d71ad4d8fde <e022dd3b875315a2d2001a512e98d1dc8c991f4a; version=6.7; version=91e035e98fa1383ca90d774c29bb14c3c5ed2d8c <a47f0b03149af538af4442ff0702eac430ace1cb

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS: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
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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