ext4: make sure the first directory block is not a hole
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.
CVE-2024-42304
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2024-42304
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3a17ca864baffc0c6f6e8aad525aa4365775a193",
"lessThan": "d81d7e347d1f1f48a5634607d39eb90c161c8afe",
"versionType": "git"
},
{
"status": "affected",
"version": "4e19d6b65fb4fc42e352ce9883649e049da14743",
"lessThan": "e02f9941e8c011aa3eafa799def6a134ce06bcfa",
"versionType": "git"
},
{
"status": "affected",
"version": "4e19d6b65fb4fc42e352ce9883649e049da14743",
"lessThan": "de2a011a13a46468a6e8259db58b1b62071fe136",
"versionType": "git"
},
{
"status": "affected",
"version": "4e19d6b65fb4fc42e352ce9883649e049da14743",
"lessThan": "9771e3d8365ae1dd5e8846a204cb9af14e3e656a",
"versionType": "git"
},
{
"status": "affected",
"version": "4e19d6b65fb4fc42e352ce9883649e049da14743",
"lessThan": "b609753cbbd38f8c0affd4956c0af178348523ac",
"versionType": "git"
},
{
"status": "affected",
"version": "4e19d6b65fb4fc42e352ce9883649e049da14743",
"lessThan": "c3893d9de8ee153baac56d127d844103488133b5",
"versionType": "git"
},
{
"status": "affected",
"version": "4e19d6b65fb4fc42e352ce9883649e049da14743",
"lessThan": "299bc6ffa57e04e74c6cce866d6c0741fb4897a1",
"versionType": "git"
},
{
"status": "affected",
"version": "4e19d6b65fb4fc42e352ce9883649e049da14743",
"lessThan": "f9ca51596bbfd0f9c386dd1c613c394c78d9e5e6",
"versionType": "git"
},
{
"status": "affected",
"version": "3f0307b0d2d8b333a6964fc4c820dc86896fd1cf",
"versionType": "git"
},
{
"status": "affected",
"version": "514631c2225c1fd556c799cc1893fb27b0f48f00",
"versionType": "git"
},
{
"status": "affected",
"version": "7f1f86276515f6816a98f6ca3ef99c827d54642f",
"versionType": "git"
},
{
"status": "affected",
"version": "5021b7a5bdd6bb859eb648c3da71cdd6aae1d133",
"versionType": "git"
},
{
"status": "affected",
"version": "4.19.62",
"lessThan": "4.19.320",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.9.187",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.14.135",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.1.21",
"lessThan": "5.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.2.4",
"lessThan": "5.3",
"versionType": "semver"
}
],
"programFiles": [
"fs/ext4/namei.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.19.320",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.282",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.224",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.165",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.103",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.44",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.10.3",
"versionType": "semver",
"lessThanOrEqual": "6.10.*"
},
{
"status": "unaffected",
"version": "6.11",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ext4/namei.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-42304
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #26682 · Revision 1
- Added to Heist Feed
- Publisher date