CVE-2024-42318Public exploit

Local sandbox escape via missing credential-transfer hook

Published Aug 17, 2024 · Updated Aug 5, 2026

Sandbox escape in the Landlock LSM in affected Linux kernels allows local users to remove Landlock restrictions using keyctl(). The Landlock credential code implements cred_prepare but omits cred_transfer, so KEYCTL_SESSION_TO_PARENT replaces credentials without copying the process security blob and loses every applied rule. Exploitation requires code execution with fork() and keyctl() access inside a Landlock sandbox; it bypasses that sandbox but does not compromise the kernel or system services.

CVSS severity8.8
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox escape in the Landlock LSM in affected Linux kernels allows local users to remove Landlock restrictions using keyctl(). The Landlock credential code implements cred_prepare but omits cred_transfer, so KEYCTL_SESSION_TO_PARENT replaces credentials without copying the process security blob and loses every applied rule. Exploitation requires code execution with fork() and keyctl() access inside a Landlock sandbox; it bypasses that sandbox but does not compromise the kernel or system services.

The record

CVE
CVE-2024-42318
Published
Aug 17, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 17, 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=385975dca53eb41031d0cbd1de318eb1bc5d6bb9 <0d74fd54db0bd0c0c224bef0da8fc95ea9c9f36c
  2. Affected versionversion=385975dca53eb41031d0cbd1de318eb1bc5d6bb9 <16896914bace82d7811c62f3b6d5320132384f49
  3. Affected versionversion=385975dca53eb41031d0cbd1de318eb1bc5d6bb9 <39705a6c29f8a2b93cf5b99528a55366c50014d1
  4. Affected versionversion=385975dca53eb41031d0cbd1de318eb1bc5d6bb9 <916c648323fa53b89eedb34a0988ddaf01406117
  5. Affected versionversion=385975dca53eb41031d0cbd1de318eb1bc5d6bb9 <b14cc2cf313bd29056fadbc8ecd7f957cf5791ff
  6. Affected versionversion=5.13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=385975dca53eb41031d0cbd1de318eb1bc5d6bb9 <0d74fd54db0bd0c0c224bef0da8fc95ea9c9f36c; version=385975dca53eb41031d0cbd1de318eb1bc5d6bb9 <16896914bace82d7811c62f3b6d5320132384f49; version=385975dca53eb41031d0cbd1de318eb1bc5d6bb9 <39705a6c29f8a2b93cf5b99528a55366c50014d1; version=385975dca53eb41031d0cbd1de318eb1bc5d6bb9 <916c648323fa53b89eedb34a0988ddaf01406117; version=385975dca53eb41031d0cbd1de318eb1bc5d6bb9 <b14cc2cf313bd29056fadbc8ecd7f957cf5791ff; version=5.13

Published CVSS scores

8.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
5.5NIST NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

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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