CVE-2024-56619

Kernel memory corruption via truncated inode size

Published Dec 27, 2024 · Updated Aug 5, 2026

Out-of-bounds memory access in Linux nilfs2 allows local users to read or corrupt kernel memory via a directory with a corrupted inode size. nilfs_last_byte() stores the 64-bit i_size in an unsigned int, discarding its upper 32 bits; nilfs_find_entry() then underflows its end calculation and scans beyond the folio. Reachability requires local access to the corrupted directory data and a lookup that traverses it; the resulting access can expose or alter data or crash the system.

CVSS severity7.8
High
EPSS probability0.21%
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 memory access in Linux nilfs2 allows local users to read or corrupt kernel memory via a directory with a corrupted inode size. nilfs_last_byte() stores the 64-bit i_size in an unsigned int, discarding its upper 32 bits; nilfs_find_entry() then underflows its end calculation and scans beyond the folio. Reachability requires local access to the corrupted directory data and a lookup that traverses it; the resulting access can expose or alter data or crash the system.

The record

CVE
CVE-2024-56619
Published
Dec 27, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 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=2.6.30
  2. Affected versionversion=2ba466d74ed74f073257f86e61519cb8f8f46184 <09d6d05579fd46e61abf6e457bb100ff11f3a9d3
  3. Affected versionversion=2ba466d74ed74f073257f86e61519cb8f8f46184 <31f7b57a77d4c82a34ddcb6ff35b5aa577ef153e
  4. Affected versionversion=2ba466d74ed74f073257f86e61519cb8f8f46184 <48eb6e7404948032bbe811c5affbe39f6b316951
  5. Affected versionversion=2ba466d74ed74f073257f86e61519cb8f8f46184 <5af8366625182f01f6d8465c9a3210574673af57
  6. Affected versionversion=2ba466d74ed74f073257f86e61519cb8f8f46184 <985ebec4ab0a28bb5910c3b1481a40fbf7f9e61d
  7. Affected versionversion=2ba466d74ed74f073257f86e61519cb8f8f46184 <c3afea07477baccdbdec4483f8d5e59d42a3f67f
  8. Affected versionversion=2ba466d74ed74f073257f86e61519cb8f8f46184 <e3732102a9d638d8627d14fdf7b208462f0520e0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.30; version=2ba466d74ed74f073257f86e61519cb8f8f46184 <09d6d05579fd46e61abf6e457bb100ff11f3a9d3; version=2ba466d74ed74f073257f86e61519cb8f8f46184 <31f7b57a77d4c82a34ddcb6ff35b5aa577ef153e; version=2ba466d74ed74f073257f86e61519cb8f8f46184 <48eb6e7404948032bbe811c5affbe39f6b316951; version=2ba466d74ed74f073257f86e61519cb8f8f46184 <5af8366625182f01f6d8465c9a3210574673af57; version=2ba466d74ed74f073257f86e61519cb8f8f46184 <985ebec4ab0a28bb5910c3b1481a40fbf7f9e61d; version=2ba466d74ed74f073257f86e61519cb8f8f46184 <c3afea07477baccdbdec4483f8d5e59d42a3f67f; version=2ba466d74ed74f073257f86e61519cb8f8f46184 <e3732102a9d638d8627d14fdf7b208462f0520e0

Published CVSS scores

7.8LinuxCVSS: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-416Use After Free

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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