CVE-2024-36958Network attack vector

NFS server crash via uninitialized ACL pointer

Published May 30, 2024 · Updated Aug 5, 2026

Uninitialized-pointer free in the NFSD attribute encoder in Linux 6.7 through 6.8.9 allows remote attackers to crash an NFSv4 server. The nfsd4_encode_fattr4 function can take an early error exit before initializing args.acl, then passes that indeterminate pointer to an unconditional kfree call. A running, reachable NFSv4 server is required; a crafted GETATTR, READDIR, or VERIFY operation can terminate the host kernel.

CVSS severity9.8
Critical
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uninitialized-pointer free in the NFSD attribute encoder in Linux 6.7 through 6.8.9 allows remote attackers to crash an NFSv4 server. The nfsd4_encode_fattr4 function can take an early error exit before initializing args.acl, then passes that indeterminate pointer to an unconditional kfree call. A running, reachable NFSv4 server is required; a crafted GETATTR, READDIR, or VERIFY operation can terminate the host kernel.

The record

CVE
CVE-2024-36958
Published
May 30, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-20, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 30, 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=6.7
  2. Affected versionversion=83ab8678ad0c6f27594c716cafe59c8bbd5e49ef <18180a4550d08be4eb0387fe83f02f703f92d4e7
  3. Affected versionversion=83ab8678ad0c6f27594c716cafe59c8bbd5e49ef <6a7b07689af6e4e023404bf69b1230f43b2a15bc

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=83ab8678ad0c6f27594c716cafe59c8bbd5e49ef <18180a4550d08be4eb0387fe83f02f703f92d4e7; version=83ab8678ad0c6f27594c716cafe59c8bbd5e49ef <6a7b07689af6e4e023404bf69b1230f43b2a15bc

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
9.8Linux CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499.004Application or System Exploitation

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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