Squashfs: sanity check symbolic link size
In the Linux kernel, the following vulnerability has been resolved: Squashfs: sanity check symbolic link size Syzkiller reports a "KMSAN: uninit-value in pick_link" bug. This is caused by an uninitialised page, which is ultimately caused by a corrupted symbolic link size read from disk. The reason why the corrupted symlink size causes an uninitialised page is due to the following sequence of events: 1. squashfs_read_inode() is called to read the symbolic link from disk. This assigns the corrupted value 3875536935 to inode->i_size. 2. Later squashfs_symlink_read_folio() is called, which assigns this corrupted value to the length variable, which being a signed int, overflows producing a negative number. 3. The following loop that fills in the page contents checks that the copied bytes is less than length, which being negative means the loop is skipped, producing an uninitialised page. This patch adds a sanity check which checks that the symbolic link size is not larger than expected. -- V2: fix spelling mistake.
CVE-2024-46744
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-2024-46744
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": "6545b246a2c815a8fcd07d58240effb6ec3481b1",
"lessThan": "f82cb7f24032ed023fc67d26ea9bf322d8431a90",
"versionType": "git"
},
{
"status": "affected",
"version": "6545b246a2c815a8fcd07d58240effb6ec3481b1",
"lessThan": "1b9451ba6f21478a75288ea3e3fca4be35e2a438",
"versionType": "git"
},
{
"status": "affected",
"version": "6545b246a2c815a8fcd07d58240effb6ec3481b1",
"lessThan": "5c8906de98d0d7ad42ff3edf2cb6cd7e0ea658c4",
"versionType": "git"
},
{
"status": "affected",
"version": "6545b246a2c815a8fcd07d58240effb6ec3481b1",
"lessThan": "087f25b2d36adae19951114ffcbb7106ed405ebb",
"versionType": "git"
},
{
"status": "affected",
"version": "6545b246a2c815a8fcd07d58240effb6ec3481b1",
"lessThan": "fac5e82ab1334fc8ed6ff7183702df634bd1d93d",
"versionType": "git"
},
{
"status": "affected",
"version": "6545b246a2c815a8fcd07d58240effb6ec3481b1",
"lessThan": "c3af7e460a526007e4bed1ce3623274a1a6afe5e",
"versionType": "git"
},
{
"status": "affected",
"version": "6545b246a2c815a8fcd07d58240effb6ec3481b1",
"lessThan": "ef4e249971eb77ec33d74c5c3de1e2576faf6c90",
"versionType": "git"
},
{
"status": "affected",
"version": "6545b246a2c815a8fcd07d58240effb6ec3481b1",
"lessThan": "810ee43d9cd245d138a2733d87a24858a23f577d",
"versionType": "git"
}
],
"programFiles": [
"fs/squashfs/inode.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.29"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.29",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.19.322",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.284",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.226",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.167",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.110",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.51",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.10.10",
"versionType": "semver",
"lessThanOrEqual": "6.10.*"
},
{
"status": "unaffected",
"version": "6.11",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/squashfs/inode.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-46744
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26713 · Revision 1
- Added to Heist Feed
- Publisher date