CVE-2024-26893

Kernel crash via repeated SMC transport cleanup

Published Apr 17, 2024 · Updated May 11, 2026

Double free in the ARM SCMI SMC transport in the Linux kernel allows local users to crash the kernel during failed probe cleanup. smc_chan_free accesses members of a shared transport_info pointer after an earlier protocol cleanup frees and nulls that structure. Reachability requires the ARM SCMI SMC transport, shared transport information, and a failed probe such as an unavailable SMC service; the bounded impact is a kernel oops or crash.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double free in the ARM SCMI SMC transport in the Linux kernel allows local users to crash the kernel during failed probe cleanup. smc_chan_free accesses members of a shared transport_info pointer after an earlier protocol cleanup frees and nulls that structure. Reachability requires the ARM SCMI SMC transport, shared transport information, and a failed probe such as an unavailable SMC service; the bounded impact is a kernel oops or crash.

The record

CVE
CVE-2024-26893
Published
Apr 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415, 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=1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 <0d276d9f335f41d6524258d58c0c0241ef9a83a4
  2. Affected versionversion=1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 <857f56db8c3a71f9871922b6984ff74ad588cb2c
  3. Affected versionversion=1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 <8ffaa17ccb1eb1b65cf85db63225a3581c303773
  4. Affected versionversion=1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 <ead445dd3d681020af333649a27306160eee761d
  5. Affected versionversion=1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 <f1d71576d2c9ec8fdb822173fa7f3de79475e9bd
  6. Affected versionversion=5.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 <0d276d9f335f41d6524258d58c0c0241ef9a83a4; version=1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 <857f56db8c3a71f9871922b6984ff74ad588cb2c; version=1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 <8ffaa17ccb1eb1b65cf85db63225a3581c303773; version=1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 <ead445dd3d681020af333649a27306160eee761d; version=1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 <f1d71576d2c9ec8fdb822173fa7f3de79475e9bd; version=5.8

Published CVSS scores

5.5NISTCVSS: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 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-415Double Free
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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