CVE-2024-35868

Local kernel memory corruption via session teardown race

Published May 19, 2024 · Updated May 23, 2026

Use-after-free in the Linux kernel SMB client allows local users to corrupt kernel memory through a procfs statistics reset. cifs_stats_proc_write iterates a server's session list during reset without skipping SES_EXITING sessions, so concurrent teardown can free a session before its connection list is accessed. The reset write is root-only on supported Ubuntu releases, and published records identify no demonstrated consequence beyond the invalid kernel-memory access.

CVSS severity7.8
High
EPSS probability0.24%
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 Linux kernel SMB client allows local users to corrupt kernel memory through a procfs statistics reset. cifs_stats_proc_write iterates a server's session list during reset without skipping SES_EXITING sessions, so concurrent teardown can free a session before its connection list is accessed. The reset write is root-only on supported Ubuntu releases, and published records identify no demonstrated consequence beyond the invalid kernel-memory access.

The record

CVE
CVE-2024-35868
Published
May 19, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 19, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=3.12.48 <3.13
  2. Affected versionversion=3.13
  3. Affected versionversion=7f48558e6489d032b1584b0cc9ac4bb11072c034 <5b5475ce69f02ecc1b13ea23106e5b89c690429b
  4. Affected versionversion=7f48558e6489d032b1584b0cc9ac4bb11072c034 <8fefd166fcb368c5fcf48238e3f7c8af829e0a72
  5. Affected versionversion=7f48558e6489d032b1584b0cc9ac4bb11072c034 <cf03020c56d3ed28c4942280957a007b5e9544f7
  6. Affected versionversion=7f48558e6489d032b1584b0cc9ac4bb11072c034 <d3da25c5ac84430f89875ca7485a3828150a7e0a
  7. Affected versionversion=a67172a013953664b1dad03c648200c70b90506c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.12.48 <3.13; version=3.13; version=7f48558e6489d032b1584b0cc9ac4bb11072c034 <5b5475ce69f02ecc1b13ea23106e5b89c690429b; version=7f48558e6489d032b1584b0cc9ac4bb11072c034 <8fefd166fcb368c5fcf48238e3f7c8af829e0a72; version=7f48558e6489d032b1584b0cc9ac4bb11072c034 <cf03020c56d3ed28c4942280957a007b5e9544f7; version=7f48558e6489d032b1584b0cc9ac4bb11072c034 <d3da25c5ac84430f89875ca7485a3828150a7e0a; version=a67172a013953664b1dad03c648200c70b90506c

Published CVSS scores

7.8NIST NVDCVSS: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

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)
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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