CVE-2024-47677

Service interruption via leaked exFAT upcase tables

Published Oct 21, 2024 · Updated May 11, 2026

Resource leak in Linux 6.8 through 6.10.12 and 6.11 through 6.11.1 allows local users to exhaust kernel memory through exFAT mounts. In fs/exfat/nls.c, exfat_load_upcase_table returns -EINVAL without releasing its allocated buffer before exfat_load_default_upcase_table allocates a replacement. Reaching the path requires local access and permission to mount a crafted exFAT filesystem; repeated mounts deplete kernel memory and interrupt service.

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 leak in Linux 6.8 through 6.10.12 and 6.11 through 6.11.1 allows local users to exhaust kernel memory through exFAT mounts. In fs/exfat/nls.c, exfat_load_upcase_table returns -EINVAL without releasing its allocated buffer before exfat_load_default_upcase_table allocates a replacement. Reaching the path requires local access and permission to mount a crafted exFAT filesystem; repeated mounts deplete kernel memory and interrupt service.

The record

CVE
CVE-2024-47677
Published
Oct 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.8
  2. Affected versionversion=a13d1a4de3b0fe3c41d818697d691c886c5585fa <331ed2c739ce656a67865f6b3ee0a478349d78cb
  3. Affected versionversion=a13d1a4de3b0fe3c41d818697d691c886c5585fa <c290fe508eee36df1640c3cb35dc8f89e073c8a8
  4. Affected versionversion=a13d1a4de3b0fe3c41d818697d691c886c5585fa <f9835aec49670c46ebe2973032caaa1043b3d4da

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.8; version=a13d1a4de3b0fe3c41d818697d691c886c5585fa <331ed2c739ce656a67865f6b3ee0a478349d78cb; version=a13d1a4de3b0fe3c41d818697d691c886c5585fa <c290fe508eee36df1640c3cb35dc8f89e073c8a8; version=a13d1a4de3b0fe3c41d818697d691c886c5585fa <f9835aec49670c46ebe2973032caaa1043b3d4da

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.4SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

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

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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