CVE-2024-53146Network attack vector

Unauthenticated kernel-memory disclosure and crash via tag overflow

Published Dec 24, 2024 · Updated Aug 5, 2026

Integer overflow in Linux NFSD allows remote attackers to disclose kernel memory or crash the host through a malformed NFS callback reply. In decode_cb_compound4res(), an attacker-controlled tag length is incremented by four, so values at least U32_MAX - 3 wrap and drive a wild kernel-memory read. A malicious NFS peer can repeatedly trigger a kernel oops that leaks addresses and can panic the host or wedge callback processing.

CVSS severity9.1
Critical
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Linux NFSD allows remote attackers to disclose kernel memory or crash the host through a malformed NFS callback reply. In decode_cb_compound4res(), an attacker-controlled tag length is incremented by four, so values at least U32_MAX - 3 wrap and drive a wild kernel-memory read. A malicious NFS peer can repeatedly trigger a kernel oops that leaks addresses and can panic the host or wedge callback processing.

The record

CVE
CVE-2024-53146
Published
Dec 24, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 24, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <084f797dbc7e52209a4ab6dbc7f0109268754eb9
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3c5f545c9a1f8a1869246f6f3ae8c17289d6a841
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <745f7ce5a95e783ba62fe774325829466aec2aa8
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7f33b92e5b18e904a481e6e208486da43e4dc841
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <842f1c27a1aef5367e535f9e85c8c3b06352151a
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <90adbae9dd158da8331d9fdd32077bd1af04f553
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ccd3394f9a7200d6b088553bf38e688620cd27af
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dde654cad08fdaac370febb161ec41eb58e9d2a2
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <de53c5305184ca1333b87e695d329d1502d694ce
  10. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <084f797dbc7e52209a4ab6dbc7f0109268754eb9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3c5f545c9a1f8a1869246f6f3ae8c17289d6a841; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <745f7ce5a95e783ba62fe774325829466aec2aa8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7f33b92e5b18e904a481e6e208486da43e4dc841; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <842f1c27a1aef5367e535f9e85c8c3b06352151a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <90adbae9dd158da8331d9fdd32077bd1af04f553; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ccd3394f9a7200d6b088553bf38e688620cd27af; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dde654cad08fdaac370febb161ec41eb58e9d2a2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <de53c5305184ca1333b87e695d329d1502d694ce; version=2.6.12

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
9.1kernel.orgCVSS:3.1/AV:N/AC:L/PR:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1210Exploitation of Remote Services

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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