erofs: validate the extent length for uncompressed pclusters
In the Linux kernel, the following vulnerability has been resolved: erofs: validate the extent length for uncompressed pclusters syzkaller reported a KASAN use-after-free: https://syzkaller.appspot.com/bug?extid=2ae90e873e97f1faf6f2 The referenced fuzzed image actually has two issues: - m_pa == 0 as a non-inlined pcluster; - The logical length is longer than its physical length. The first issue has already been addressed. This patch addresses the second issue by checking the extent length validity.
CVE-2022-50746
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-2022-50746
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": "02827e1796b33f1794966f5c3101f8da2dfa9c1d",
"lessThan": "dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e",
"versionType": "git"
},
{
"status": "affected",
"version": "02827e1796b33f1794966f5c3101f8da2dfa9c1d",
"lessThan": "40c73b2ea9611b5388807be406f30f5e4e1162da",
"versionType": "git"
},
{
"status": "affected",
"version": "02827e1796b33f1794966f5c3101f8da2dfa9c1d",
"lessThan": "c505feba4c0d76084e56ec498ce819f02a7043ae",
"versionType": "git"
}
],
"programFiles": [
"fs/erofs/zmap.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.0.16",
"versionType": "semver",
"lessThanOrEqual": "6.0.*"
},
{
"status": "unaffected",
"version": "6.1.2",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/erofs/zmap.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2022-50746
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30231 · Revision 1
- Added to Heist Feed
- Publisher date