CVE-2024-50152Network attack vector

Kernel compromise via SMB extended-attribute double free

Published Nov 7, 2024 · Updated Aug 5, 2026

Double free in the Linux SMB client in Linux 6.6.32 through 6.6.58 and 6.8 through 6.11.5 allows remote attackers to compromise the kernel. The smb2_set_ea() replay path frees ea at sea_exit, then retries without resetting the pointer, allowing another early exit to free the stale allocation again. A malicious SMB server must reset an established share connection and return crafted extended-attribute responses; the resulting allocator corruption crashes the host or enables kernel-memory disclosure and control-flow hijacking.

CVSS severity9.8
Critical
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

Double free in the Linux SMB client in Linux 6.6.32 through 6.6.58 and 6.8 through 6.11.5 allows remote attackers to compromise the kernel. The smb2_set_ea() replay path frees ea at sea_exit, then retries without resetting the pointer, allowing another early exit to free the stale allocation again. A malicious SMB server must reset an established share connection and return crafted extended-attribute responses; the resulting allocator corruption crashes the host or enables kernel-memory disclosure and control-flow hijacking.

The record

CVE
CVE-2024-50152
Published
Nov 7, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 7, 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=433042a91f9373241307725b52de573933ffedbf <b1813c220b76f60b1727984794377c4aa849d4c1
  2. Affected versionversion=4f1fffa2376922f3d1d506e49c0fd445b023a28e <19ebc1e6cab334a8193398d4152deb76019b5d34
  3. Affected versionversion=4f1fffa2376922f3d1d506e49c0fd445b023a28e <c9f758ecf2562dfdd4adf12c22921b5de8366123
  4. Affected versionversion=6.6.32 <6.6.59
  5. Affected versionversion=6.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=433042a91f9373241307725b52de573933ffedbf <b1813c220b76f60b1727984794377c4aa849d4c1; version=4f1fffa2376922f3d1d506e49c0fd445b023a28e <19ebc1e6cab334a8193398d4152deb76019b5d34; version=4f1fffa2376922f3d1d506e49c0fd445b023a28e <c9f758ecf2562dfdd4adf12c22921b5de8366123; version=6.6.32 <6.6.59; version=6.8

Published CVSS scores

9.8Linux CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.5NVDCVSS: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-415Double Free
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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