ext4: make sure the first directory block is not a hole

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-42304
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-08-17 09:15:10 UTC
Updated2026-05-12 12:17:06 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ext4: make sure the first directory block is not a hole The syzbot constructs a directory that has no dirblock but is non-inline, i.e. the first directory block is a hole. And no errors are reported when creating files in this directory in the following flow. ext4_mknod ... ext4_add_entry // Read block 0 ext4_read_dirblock(dir, block, DIRENT) bh = ext4_bread(NULL, inode, block, 0) if (!bh && (type == INDEX || type == DIRENT_HTREE)) // The first directory block is a hole // But type == DIRENT, so no error is reported. After that, we get a directory block without '.' and '..' but with a valid dentry. This may cause some code that relies on dot or dotdot (such as make_indexed_dir()) to crash. Therefore when ext4_read_dirblock() finds that the first directory block is a hole report that the filesystem is corrupted and return an error to avoid loading corrupted data from disk causing something bad.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 3a17ca864baffc0c6f6e8aad525aa4365775a193 d81d7e347d1f1f48a5634607d39eb90c161c8afe git Not specified
CNA Linux Linux affected 4e19d6b65fb4fc42e352ce9883649e049da14743 e02f9941e8c011aa3eafa799def6a134ce06bcfa git Not specified
CNA Linux Linux affected 4e19d6b65fb4fc42e352ce9883649e049da14743 de2a011a13a46468a6e8259db58b1b62071fe136 git Not specified
CNA Linux Linux affected 4e19d6b65fb4fc42e352ce9883649e049da14743 9771e3d8365ae1dd5e8846a204cb9af14e3e656a git Not specified
CNA Linux Linux affected 4e19d6b65fb4fc42e352ce9883649e049da14743 b609753cbbd38f8c0affd4956c0af178348523ac git Not specified
CNA Linux Linux affected 4e19d6b65fb4fc42e352ce9883649e049da14743 c3893d9de8ee153baac56d127d844103488133b5 git Not specified
CNA Linux Linux affected 4e19d6b65fb4fc42e352ce9883649e049da14743 299bc6ffa57e04e74c6cce866d6c0741fb4897a1 git Not specified
CNA Linux Linux affected 4e19d6b65fb4fc42e352ce9883649e049da14743 f9ca51596bbfd0f9c386dd1c613c394c78d9e5e6 git Not specified
CNA Linux Linux affected 3f0307b0d2d8b333a6964fc4c820dc86896fd1cf git Not specified
CNA Linux Linux affected 514631c2225c1fd556c799cc1893fb27b0f48f00 git Not specified
CNA Linux Linux affected 7f1f86276515f6816a98f6ca3ef99c827d54642f git Not specified
CNA Linux Linux affected 5021b7a5bdd6bb859eb648c3da71cdd6aae1d133 git Not specified
CNA Linux Linux affected 5.3 Not specified
CNA Linux Linux unaffected 5.3 semver Not specified
CNA Linux Linux unaffected 4.19.320 4.19.* semver Not specified
CNA Linux Linux unaffected 5.4.282 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.224 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.165 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.103 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.44 6.6.* semver Not specified
CNA Linux Linux unaffected 6.10.3 6.10.* semver Not specified
CNA Linux Linux unaffected 6.11 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/de2a011a13a46468a6e8259db58b1b62071fe136 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f9ca51596bbfd0f9c386dd1c613c394c78d9e5e6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b609753cbbd38f8c0affd4956c0af178348523ac 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9771e3d8365ae1dd5e8846a204cb9af14e3e656a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/d81d7e347d1f1f48a5634607d39eb90c161c8afe 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2024/10/msg00003.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/299bc6ffa57e04e74c6cce866d6c0741fb4897a1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c3893d9de8ee153baac56d127d844103488133b5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/01/msg00001.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/e02f9941e8c011aa3eafa799def6a134ce06bcfa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report