CVE-2024-53066Network attack vector

Remote kernel compromise via uninitialized NFS pointer

Published Nov 19, 2024 · Updated Aug 5, 2026

Memory corruption in the Linux NFS client allows remote attackers to compromise the kernel through a crafted NFSv4 GETATTR reply. decode_getfattr_attrs() invokes decode_attr_mdsthreshold() with an uninitialized fattr->mdsthreshold pointer, enabling a controlled kernel-memory write from server-supplied XDR values. Reachability requires an existing NFSv4 mount to a malicious or compromised server, or an on-path attacker modifying unprotected AUTH_SYS traffic; exploitation grants kernel code execution or crashes the client.

CVSS severity9.8
Critical
EPSS probability0.66%
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 NFS client allows remote attackers to compromise the kernel through a crafted NFSv4 GETATTR reply. decode_getfattr_attrs() invokes decode_attr_mdsthreshold() with an uninitialized fattr->mdsthreshold pointer, enabling a controlled kernel-memory write from server-supplied XDR values. Reachability requires an existing NFSv4 mount to a malicious or compromised server, or an on-path attacker modifying unprotected AUTH_SYS traffic; exploitation grants kernel code execution or crashes the client.

The record

CVE
CVE-2024-53066
Published
Nov 19, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 19, 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=3.5
  2. Affected versionversion=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <25ffd294fef81a7f3cd9528adf21560c04d98747
  3. Affected versionversion=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <8fc5ea9231af9122d227c9c13f5e578fca48d2e3
  4. Affected versionversion=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <9b453e8b108a5a93a6e348cf2ba4c9c138314a00
  5. Affected versionversion=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <9be0a21ae52b3b822d0eec4d14e909ab394f8a92
  6. Affected versionversion=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <bbfcd261cc068fe1cd02a4e871275074a0daa4e2
  7. Affected versionversion=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <dc270d7159699ad6d11decadfce9633f0f71c1db
  8. Affected versionversion=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <f6b2b2b981af8e7d7c62d34143acefa4e1edfe8b
  9. Affected versionversion=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <f749cb60a01f8391c760a1d6ecd938cadacf9549

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.5; version=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <25ffd294fef81a7f3cd9528adf21560c04d98747; version=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <8fc5ea9231af9122d227c9c13f5e578fca48d2e3; version=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <9b453e8b108a5a93a6e348cf2ba4c9c138314a00; version=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <9be0a21ae52b3b822d0eec4d14e909ab394f8a92; version=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <bbfcd261cc068fe1cd02a4e871275074a0daa4e2; version=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <dc270d7159699ad6d11decadfce9633f0f71c1db; version=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <f6b2b2b981af8e7d7c62d34143acefa4e1edfe8b; version=88034c3d88c2c48b215f2cc5eb22e564aa817f9c <f749cb60a01f8391c760a1d6ecd938cadacf9549

Published CVSS scores

9.8Linux kernel CNACVSS:3.1/AV:N/AC:L/PR:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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