Answer in brief
CVE-2024-42304 records a High severity (CVSS 7.8) vulnerability in ext4: make sure the first directory block is not a hole. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=3a17ca864baffc0c6f6e8aad525aa4365775a193 <d81d7e347d1f1f48a5634607d39eb90c161c8afe || >=4e19d6b65fb4fc42e352ce9883649e049da14743 <e02f9941e8c011aa3eafa799def6a134ce06bcfa || >=4e19d6b65fb4fc42e352ce9883649e049da14743 <de2a011a13a46468a6e8259db58b1b62071fe136 || >=4e19d6b65fb4fc42e352ce9883649e049da14743 <9771e3d8365ae1dd5e8846a204cb9af14e3e656a || >=4e19d6b65fb4fc42e352ce9883649e049da14743 <b609753cbbd38f8c0affd4956c0af178348523ac || >=4e19d6b65fb4fc42e352ce9883649e049da14743 <c3893d9de8ee153baac56d127d844103488133b5 || >=4e19d6b65fb4fc42e352ce9883649e049da14743 <299bc6ffa57e04e74c6cce866d6c0741fb4897a1 || >=4e19d6b65fb4fc42e352ce9883649e049da14743 <f9ca51596bbfd0f9c386dd1c613c394c78d9e5e6 || 3f0307b0d2d8b333a6964fc4c820dc86896fd1cf || 514631c2225c1fd556c799cc1893fb27b0f48f00 || 7f1f86276515f6816a98f6ca3ef99c827d54642f || 5021b7a5bdd6bb859eb648c3da71cdd6aae1d133 || >=4.19.62 <4.19.320 || >=4.9.187 <4.10 || >=4.14.135 <4.15 || >=5.1.21 <5.2 || >=5.2.4 <5.3 | d81d7e347d1f1f48a5634607d39eb90c161c8afe, e02f9941e8c011aa3eafa799def6a134ce06bcfa, de2a011a13a46468a6e8259db58b1b62071fe136, 9771e3d8365ae1dd5e8846a204cb9af14e3e656a, b609753cbbd38f8c0affd4956c0af178348523ac, c3893d9de8ee153baac56d127d844103488133b5, 299bc6ffa57e04e74c6cce866d6c0741fb4897a1, f9ca51596bbfd0f9c386dd1c613c394c78d9e5e6, 4.19.320, 4.10, 4.15, 5.2, 5.3 |
| Linux/Linuxgeneric | 5.3 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <V1.1.1 | V1.1.1 |
Published upstream
Aug 17, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In 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.
Quoted source text, attributed separately from HOL analysis.