CVE-2024-26592

Kernel memory corruption via TCP transport race

Published Feb 22, 2024 · Updated Aug 5, 2026

Use-after-free in the ksmbd component of the Linux kernel allows local users to corrupt kernel memory during TCP connection teardown. ksmbd_tcp_new_connection stored the new handler through struct tcp_transport, allowing a disconnecting handler to free that transport before the creator checked the stored pointer. The race requires ksmbd to be enabled and a new connection to disconnect during handler startup; the exact post-corruption outcome is not publicly documented.

CVSS severity7.8
High
EPSS probability0.97%
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 the ksmbd component of the Linux kernel allows local users to corrupt kernel memory during TCP connection teardown. ksmbd_tcp_new_connection stored the new handler through struct tcp_transport, allowing a disconnecting handler to free that transport before the creator checked the stored pointer. The race requires ksmbd to be enabled and a new connection to disconnect during handler startup; the exact post-corruption outcome is not publicly documented.

The record

CVE
CVE-2024-26592
Published
Feb 22, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 22, 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=5.15
  2. Affected versionversion=a848c4f15ab6d5d405dbee7de5da71839b2bf35e <24290ba94cd0136e417283b0dbf8fcdabcf62111
  3. Affected versionversion=a848c4f15ab6d5d405dbee7de5da71839b2bf35e <380965e48e9c32ee4263c023e1d830ea7e462ed1
  4. Affected versionversion=a848c4f15ab6d5d405dbee7de5da71839b2bf35e <38d20c62903d669693a1869aa68c4dd5674e2544
  5. Affected versionversion=a848c4f15ab6d5d405dbee7de5da71839b2bf35e <69d54650b751532d1e1613a4fb433e591aeef126
  6. Affected versionversion=a848c4f15ab6d5d405dbee7de5da71839b2bf35e <999daf367b924fdf14e9d83e034ee0f86bc17ec6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=a848c4f15ab6d5d405dbee7de5da71839b2bf35e <24290ba94cd0136e417283b0dbf8fcdabcf62111; version=a848c4f15ab6d5d405dbee7de5da71839b2bf35e <380965e48e9c32ee4263c023e1d830ea7e462ed1; version=a848c4f15ab6d5d405dbee7de5da71839b2bf35e <38d20c62903d669693a1869aa68c4dd5674e2544; version=a848c4f15ab6d5d405dbee7de5da71839b2bf35e <69d54650b751532d1e1613a4fb433e591aeef126; version=a848c4f15ab6d5d405dbee7de5da71839b2bf35e <999daf367b924fdf14e9d83e034ee0f86bc17ec6
The Linux Kernel Organization · Linux Kernelversion=5.15; version=a848c4f15ab6 <24290ba94cd0; version=a848c4f15ab6 <380965e48e9c; version=a848c4f15ab6 <38d20c62903d; version=a848c4f15ab6 <69d54650b751; version=a848c4f15ab6 <999daf367b92

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

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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