CVE-2024-26712

Kernel memory corruption via unaligned KASAN region

Published Apr 3, 2024 · Updated Aug 5, 2026

Memory corruption in affected Linux kernel releases allows local users to overwrite kernel memory on PowerPC 32-bit KASAN systems. In kasan_init_region, an unaligned k_start makes block + k_cur - k_start point before the memblock_alloc allocation, so later reservations do not protect the aliased page. The flaw is established during boot only when 32-bit PowerPC KASAN is enabled; subsequent ordinary local kernel activity can corrupt unrelated kernel objects, disclose memory, or crash the system.

CVSS severity7.8
High
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

Memory corruption in affected Linux kernel releases allows local users to overwrite kernel memory on PowerPC 32-bit KASAN systems. In kasan_init_region, an unaligned k_start makes block + k_cur - k_start point before the memblock_alloc allocation, so later reservations do not protect the aliased page. The flaw is established during boot only when 32-bit PowerPC KASAN is enabled; subsequent ordinary local kernel activity can corrupt unrelated kernel objects, disclose memory, or crash the system.

The record

CVE
CVE-2024-26712
Published
Apr 3, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 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=5.3.6 <5.4
  2. Affected versionversion=5.4
  3. Affected versionversion=5ce93076d8ee2a0fac3ad4adbd2e91b6197146db
  4. Affected versionversion=663c0c9496a69f80011205ba3194049bcafd681d <0516c06b19dc64807c10e01bb99b552bdf2d7dbe
  5. Affected versionversion=663c0c9496a69f80011205ba3194049bcafd681d <0c09912dd8387e228afcc5e34ac5d79b1e3a1058
  6. Affected versionversion=663c0c9496a69f80011205ba3194049bcafd681d <230e89b5ad0a33f530a2a976b3e5e4385cb27882
  7. Affected versionversion=663c0c9496a69f80011205ba3194049bcafd681d <2738e0aa2fb24a7ab9c878d912dc2b239738c6c6
  8. Affected versionversion=663c0c9496a69f80011205ba3194049bcafd681d <4a7aee96200ad281a5cc4cf5c7a2e2a49d2b97b0
  9. Affected versionversion=663c0c9496a69f80011205ba3194049bcafd681d <70ef2ba1f4286b2b73675aeb424b590c92d57b25

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.3.6 <5.4; version=5.4; version=5ce93076d8ee2a0fac3ad4adbd2e91b6197146db; version=663c0c9496a69f80011205ba3194049bcafd681d <0516c06b19dc64807c10e01bb99b552bdf2d7dbe; version=663c0c9496a69f80011205ba3194049bcafd681d <0c09912dd8387e228afcc5e34ac5d79b1e3a1058; version=663c0c9496a69f80011205ba3194049bcafd681d <230e89b5ad0a33f530a2a976b3e5e4385cb27882; version=663c0c9496a69f80011205ba3194049bcafd681d <2738e0aa2fb24a7ab9c878d912dc2b239738c6c6; version=663c0c9496a69f80011205ba3194049bcafd681d <4a7aee96200ad281a5cc4cf5c7a2e2a49d2b97b0; version=663c0c9496a69f80011205ba3194049bcafd681d <70ef2ba1f4286b2b73675aeb424b590c92d57b25

Published CVSS scores

4.4CISA-ADPCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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

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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