CVE-2024-26618

Service interruption via repeated SME storage allocation

Published Feb 29, 2024 · Updated May 23, 2026

Resource exhaustion in arm64 SME support in Linux 6.1.47 through 6.1.139 and 6.4.12 through 6.5 allows local users to interrupt service. When sme_alloc() finds existing storage without a flush request, it allocates replacement storage instead of returning early, leaking the old allocation and corrupting SME state. Exploitation requires local low-privileged access on an arm64 system with SME support; the published impact is a service interruption, not data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in arm64 SME support in Linux 6.1.47 through 6.1.139 and 6.4.12 through 6.5 allows local users to interrupt service. When sme_alloc() finds existing storage without a flush request, it allocates replacement storage instead of returning early, leaking the old allocation and corrupting SME state. Exploitation requires local low-privileged access on an arm64 system with SME support; the published impact is a service interruption, not data disclosure or modification.

The record

CVE
CVE-2024-26618
Published
Feb 29, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-770, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 29, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=21614ba60883eb93b99a7ee4b41cb927f93b39ae <f6421555dbd7cb3d4d70b69f33f998aaeca1e3b5
  2. Affected versionversion=5d0a8d2fba50e9c07cde4aad7fba28c008b07a5b <569156e4fa347237f8fa2a7e935d860109c55ac4
  3. Affected versionversion=5d0a8d2fba50e9c07cde4aad7fba28c008b07a5b <814af6b4e6000e574e74d92197190edf07cc3680
  4. Affected versionversion=5d0a8d2fba50e9c07cde4aad7fba28c008b07a5b <dc7eb8755797ed41a0d1b5c0c39df3c8f401b3d9
  5. Affected versionversion=6.1.47 <6.1.140
  6. Affected versionversion=6.4.12 <6.5
  7. Affected versionversion=6.5
  8. Affected versionversion=e01af8e26c23a08625a3dd6c8c472a1752d76cce

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=21614ba60883eb93b99a7ee4b41cb927f93b39ae <f6421555dbd7cb3d4d70b69f33f998aaeca1e3b5; version=5d0a8d2fba50e9c07cde4aad7fba28c008b07a5b <569156e4fa347237f8fa2a7e935d860109c55ac4; version=5d0a8d2fba50e9c07cde4aad7fba28c008b07a5b <814af6b4e6000e574e74d92197190edf07cc3680; version=5d0a8d2fba50e9c07cde4aad7fba28c008b07a5b <dc7eb8755797ed41a0d1b5c0c39df3c8f401b3d9; version=6.1.47 <6.1.140; version=6.4.12 <6.5; version=6.5; version=e01af8e26c23a08625a3dd6c8c472a1752d76cce

Published CVSS scores

5.5NIST NVDCVSS: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-770Allocation of Resources Without Limits or Throttling
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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