CVE-2024-38623

Kernel memory corruption via undersized filename array

Published Jun 21, 2024 · Updated Aug 5, 2026

Memory corruption in the Linux kernel allows local users to corrupt kernel memory through long NTFS3 filenames or labels. The NTFS3 cpu_str structure declares a 20-byte name array, while ntfs_set_label and related filename paths copy up to 256 or 510 bytes using attacker-controlled lengths. Access requires a mounted NTFS3 volume; unprivileged lookup, creation, link, or rename operations can disclose adjacent heap data, corrupt kernel objects, or panic the system.

CVSS severity7.8
High
EPSS probability0.53%
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 the Linux kernel allows local users to corrupt kernel memory through long NTFS3 filenames or labels. The NTFS3 cpu_str structure declares a 20-byte name array, while ntfs_set_label and related filename paths copy up to 256 or 510 bytes using attacker-controlled lengths. Access requires a mounted NTFS3 volume; unprivileged lookup, creation, link, or rename operations can disclose adjacent heap data, corrupt kernel objects, or panic the system.

The record

CVE
CVE-2024-38623
Published
Jun 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-129, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 21, 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=4534a70b7056fd4b9a1c6db5a4ce3c98546b291e <1997cdc3e727526aa5d84b32f7cbb3f56459b7ef
  2. Affected versionversion=4534a70b7056fd4b9a1c6db5a4ce3c98546b291e <1fe1c9dc21ee52920629d2d9b9bd84358931a8d1
  3. Affected versionversion=4534a70b7056fd4b9a1c6db5a4ce3c98546b291e <3839a9b19a4b70eff6b6ad70446f639f7fd5a3d7
  4. Affected versionversion=4534a70b7056fd4b9a1c6db5a4ce3c98546b291e <a2de301d90b782ac5d7a5fe32995caaee9ab3a0f
  5. Affected versionversion=4534a70b7056fd4b9a1c6db5a4ce3c98546b291e <cceef44b34819c24bb6ed70dce5b524bd3e368d1
  6. Affected versionversion=5.15

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4534a70b7056fd4b9a1c6db5a4ce3c98546b291e <1997cdc3e727526aa5d84b32f7cbb3f56459b7ef; version=4534a70b7056fd4b9a1c6db5a4ce3c98546b291e <1fe1c9dc21ee52920629d2d9b9bd84358931a8d1; version=4534a70b7056fd4b9a1c6db5a4ce3c98546b291e <3839a9b19a4b70eff6b6ad70446f639f7fd5a3d7; version=4534a70b7056fd4b9a1c6db5a4ce3c98546b291e <a2de301d90b782ac5d7a5fe32995caaee9ab3a0f; version=4534a70b7056fd4b9a1c6db5a4ce3c98546b291e <cceef44b34819c24bb6ed70dce5b524bd3e368d1; version=5.15
The Linux Kernel Organization · Linux Kernelversion=4534a70b7056 <1997cdc3e727; version=4534a70b7056 <1fe1c9dc21ee; version=4534a70b7056 <3839a9b19a4b; version=4534a70b7056 <a2de301d90b7; version=4534a70b7056 <cceef44b3481; version=5.15

Published CVSS scores

7.8Linux Kernel CVE TeamCVSS: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

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-129Improper Validation of Array Index
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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