CVE-2024-53185Network attack vector

CIFS mount disruption via unset SMB3.02 cipher state

Published Dec 27, 2024 · Updated Aug 5, 2026

NULL pointer dereference in the Linux kernel CIFS client allows remote attackers to disrupt SMB mounts through crafted SMB3.02 server replies. The smb2pdu.c negotiation path leaves server->cipher_type unset for SMB3.02, so its allocation guard skips smb3_crypto_aead_allocate and crypto_aead_setkey dereferences a null transform. A malicious or compromised SMB server, redirected DFS referral, or man-in-the-middle attacker can cause an unusable mount or kernel panic when encryption is forced.

CVSS severity7.5
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel CIFS client allows remote attackers to disrupt SMB mounts through crafted SMB3.02 server replies. The smb2pdu.c negotiation path leaves server->cipher_type unset for SMB3.02, so its allocation guard skips smb3_crypto_aead_allocate and crypto_aead_setkey dereferences a null transform. A malicious or compromised SMB server, redirected DFS referral, or man-in-the-middle attacker can cause an unusable mount or kernel panic when encryption is forced.

The record

CVE
CVE-2024-53185
Published
Dec 27, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 27, 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=0809fb86ad13b29e1d6d491364fc7ea4fb545995 <46f8e25926817272ec8d5bfbd003569bdeb9a8c8
  2. Affected versionversion=538c26d9bf70c90edc460d18c81008a4e555925a <22127c1dc04364cda3da812161e70921e6c3c0af
  3. Affected versionversion=6.11.4 <6.11.11
  4. Affected versionversion=6.12
  5. Affected versionversion=6.6.57 <6.6.64
  6. Affected versionversion=8f14a476abba13144df5434871a7225fd29af633 <92c5b62879073b489793a067dbe8d4f2728cdcad
  7. Affected versionversion=b0abcd65ec545701b8793e12bc27dc98042b151a <4bdec0d1f658f7c98749bd2c5a486e6cfa8565d2
  8. Affected versionversion=b0abcd65ec545701b8793e12bc27dc98042b151a <9b8904b53b5ace0519c74cd89fc3ca763f3856d4
  9. Affected versionversion=bce966530fd5542bbb422cb45ecb775f7a1a6bc3 <44c495818d9c4a741ab9e6bc9203ccc9f55f6f40
  10. Affected versionversion=ef51c0d544b1518b35364480317ab6d3468f205d <4a788ebbb10db9da453d52eaf44a41c13dc446df

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0809fb86ad13b29e1d6d491364fc7ea4fb545995 <46f8e25926817272ec8d5bfbd003569bdeb9a8c8; version=538c26d9bf70c90edc460d18c81008a4e555925a <22127c1dc04364cda3da812161e70921e6c3c0af; version=6.11.4 <6.11.11; version=6.12; version=6.6.57 <6.6.64; version=8f14a476abba13144df5434871a7225fd29af633 <92c5b62879073b489793a067dbe8d4f2728cdcad; version=b0abcd65ec545701b8793e12bc27dc98042b151a <4bdec0d1f658f7c98749bd2c5a486e6cfa8565d2; version=b0abcd65ec545701b8793e12bc27dc98042b151a <9b8904b53b5ace0519c74cd89fc3ca763f3856d4; version=bce966530fd5542bbb422cb45ecb775f7a1a6bc3 <44c495818d9c4a741ab9e6bc9203ccc9f55f6f40; version=ef51c0d544b1518b35364480317ab6d3468f205d <4a788ebbb10db9da453d52eaf44a41c13dc446df

Published CVSS scores

7.5Linux kernel CNACVSS:3.1/AV:N/AC:L/PR:N/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 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

T1499.004Application 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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