CVE-2021-47342
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
ext4: fix possible UAF when remounting r/o a mmp-protected file system
In the Linux kernel, the following vulnerability has been resolved: ext4: fix possible UAF when remounting r/o a mmp-protected file system After commit 618f003199c6 ("ext4: fix memory leak in ext4_fill_super"), after the file system is remounted read-only, there is a race where the kmmpd thread can exit, causing sbi->s_mmp_tsk to point at freed memory, which the call to ext4_stop_mmpd() can trip over. Fix this by only allowing kmmpd() to exit when it is stopped via ext4_stop_mmpd(). Bug-Report-Link: <20210629143603.2166962-1-yebin10@huawei.com>
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5e4f5138bd8522ebe231a137682d3857209a2c07 | affected | git | b663890d854403e566169f7e90aed5cd6ff64f6b | Unavailable | None listed |
| eb7b40d9d3785f7a131fb0b1f89bb6efa46c1833 | affected | git | 7ed572cdf11081f8f9e07abd4bea56a3f2c4edbd | Unavailable | None listed |
| 618f003199c6188e01472b03cdbba227f1dc5f24 | affected | git | 61bb4a1c417e5b95d9edb4f887f131de32e419cb | Unavailable | None listed |
| cecfdb9cf9a700d1037066173abac0617f6788df | affected | git | Unavailable | Unavailable | None listed |
| 5.12.18 | affected | semver | 5.13 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.10.51 | affected | semver | 5.10.77 | Unavailable | None listed |