CVE-2024-26664

Kernel memory corruption via premature cpu_map write

Published Apr 2, 2024 · Updated Aug 5, 2026

Out-of-bounds write in Linux coretemp in affected kernels allows local users to corrupt kernel memory during CPU onlining. create_core_data() writes a core identifier into pdata->cpu_map[] before constraining its allocated index to the 128-entry array. The coretemp driver must process a package with more than 128 cores; module initialization or CPU onlining can then corrupt adjacent kernel memory.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Linux coretemp in affected kernels allows local users to corrupt kernel memory during CPU onlining. create_core_data() writes a core identifier into pdata->cpu_map[] before constraining its allocated index to the 128-entry array. The coretemp driver must process a package with more than 128 cores; module initialization or CPU onlining can then corrupt adjacent kernel memory.

The record

CVE
CVE-2024-26664
Published
Apr 2, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 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=30cf0dee372baf9b515f2d9c7218f905fddf3cdb <a16afec8e83c56b14a4a73d2e3fb8eec3a8a057e
  2. Affected versionversion=4.19.264 <4.19.307
  3. Affected versionversion=4f9dcadc55c21b39b072bb0882362c7edc4340bc <93f0f4e846fcb682c3ec436e3b2e30e5a3a8ee6a
  4. Affected versionversion=5.10.152 <5.10.210
  5. Affected versionversion=5.15.76 <5.15.149
  6. Affected versionversion=5.4.221 <5.4.269
  7. Affected versionversion=6.0.6 <6.1
  8. Affected versionversion=6.1
  9. Affected versionversion=7108b80a542b9d65e44b36d64a700a83658c0b73 <3a7753bda55985dc26fae17795cb10d825453ad1
  10. Affected versionversion=7108b80a542b9d65e44b36d64a700a83658c0b73 <4e440abc894585a34c2904a32cd54af1742311b3
  11. Affected versionversion=7108b80a542b9d65e44b36d64a700a83658c0b73 <853a6503c586a71abf27e60a7f8c4fb28092976d
  12. Affected versionversion=7108b80a542b9d65e44b36d64a700a83658c0b73 <9bce69419271eb8b2b3ab467387cb59c99d80deb
  13. Affected versionversion=c00cdfc9bd767ee743ad3a4054de17aeb0afcbca <1eb74c00c9c3b13cb65e508c5d5a2f11afb96b8b
  14. Affected versionversion=d1de8e1ae924d9dc31548676e4a665b52ebee27e
  15. Affected versionversion=d9f0159da05df869071164edf0c6d7302efc5eca <f0da068c75c20ffc5ba28243ff577531dc2af1fd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=30cf0dee372baf9b515f2d9c7218f905fddf3cdb <a16afec8e83c56b14a4a73d2e3fb8eec3a8a057e; version=4.19.264 <4.19.307; version=4f9dcadc55c21b39b072bb0882362c7edc4340bc <93f0f4e846fcb682c3ec436e3b2e30e5a3a8ee6a; version=5.10.152 <5.10.210; version=5.15.76 <5.15.149; version=5.4.221 <5.4.269; version=6.0.6 <6.1; version=6.1; version=7108b80a542b9d65e44b36d64a700a83658c0b73 <3a7753bda55985dc26fae17795cb10d825453ad1; version=7108b80a542b9d65e44b36d64a700a83658c0b73 <4e440abc894585a34c2904a32cd54af1742311b3; version=7108b80a542b9d65e44b36d64a700a83658c0b73 <853a6503c586a71abf27e60a7f8c4fb28092976d; version=7108b80a542b9d65e44b36d64a700a83658c0b73 <9bce69419271eb8b2b3ab467387cb59c99d80deb; version=c00cdfc9bd767ee743ad3a4054de17aeb0afcbca <1eb74c00c9c3b13cb65e508c5d5a2f11afb96b8b; version=d1de8e1ae924d9dc31548676e4a665b52ebee27e; version=d9f0159da05df869071164edf0c6d7302efc5eca <f0da068c75c20ffc5ba28243ff577531dc2af1fd

Published CVSS scores

7.8Linux CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation

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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