CVE-2024-46696Network attack vector

Kernel compromise via freed delegation access

Published Sep 13, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel NFSD 6.9 through 6.10.7 allows remote attackers to corrupt kernel memory via NFSv4 requests. nfsd4_cb_getattr_release drops the delegation reference before clearing and testing embedded state bits, so callback wake-up code reads and writes freed slab memory. An attacker on a host permitted by the NFS export can control CB_GETATTR reply timing and DELEGRETURN ordering, enabling kernel data disclosure, memory corruption, or a server panic.

CVSS severity9.8
Critical
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel NFSD 6.9 through 6.10.7 allows remote attackers to corrupt kernel memory via NFSv4 requests. nfsd4_cb_getattr_release drops the delegation reference before clearing and testing embedded state bits, so callback wake-up code reads and writes freed slab memory. An attacker on a host permitted by the NFS export can control CB_GETATTR reply timing and DELEGRETURN ordering, enabling kernel data disclosure, memory corruption, or a server panic.

The record

CVE
CVE-2024-46696
Published
Sep 13, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 13, 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=6.9
  2. Affected versionversion=c5967721e1063648b0506481585ba7e2e49a075e <1116e0e372eb16dd907ec571ce5d4af325c55c10
  3. Affected versionversion=c5967721e1063648b0506481585ba7e2e49a075e <e0b66698a5ae41078f7490e8b3527013f5fccd6c

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.9; version=c5967721e1063648b0506481585ba7e2e49a075e <1116e0e372eb16dd907ec571ce5d4af325c55c10; version=c5967721e1063648b0506481585ba7e2e49a075e <e0b66698a5ae41078f7490e8b3527013f5fccd6c

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8kernel.orgCVSS: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 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-416Use After Free
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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