CVE-2021-47342
published 2024-05-21CVE-2021-47342: 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…
PriorityP337high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.24%
15.8th percentile
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:
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.14.6-1 (bookworm) | linux 5.14.6-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 5.10.51 < 5.10.77 | 5.10.77 |
| linux | linux | >= 5.12.18 < 5.13 | 5.13 |
| linux | linux | >= 5e4f5138bd8522ebe231a137682d3857209a2c07 < b663890d854403e566169f7e90aed5cd6ff64f6b | b663890d854403e566169f7e90aed5cd6ff64f6b |
| linux | linux | >= 618f003199c6188e01472b03cdbba227f1dc5f24 < 61bb4a1c417e5b95d9edb4f887f131de32e419cb | 61bb4a1c417e5b95d9edb4f887f131de32e419cb |
| linux | linux | >= eb7b40d9d3785f7a131fb0b1f89bb6efa46c1833 < 7ed572cdf11081f8f9e07abd4bea56a3f2c4edbd | 7ed572cdf11081f8f9e07abd4bea56a3f2c4edbd |
| linux | linux_kernel | < 5.10.77 | 5.10.77 |
| linux | linux_kernel | >= 0 < 5.10.84-1 | 5.10.84-1 |
| linux | linux_kernel | >= 0 < 5.14.6-1 | 5.14.6-1 |
| linux | linux_kernel | >= 0 < 5.14.6-1 | 5.14.6-1 |
| linux | linux_kernel | >= 0 < 5.14.6-1 | 5.14.6-1 |
| linux | linux_kernel | >= 5.11 < 5.13.3 | 5.13.3 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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Red Hat
kernel: ext4: fix possible UAF when remounting r/o a mmp-protected file system
vendor_redhat·2024-05-21·CVSS 7.8
CVE-2021-47342 [HIGH] CWE-416 kernel: ext4: fix possible UAF when remounting r/o a mmp-protected file system
kernel: 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:
Package: kernel (Red Hat Enterprise Linux 6) - Out of support scope
Package: kernel (Red Hat Enterprise Linux 7) - Out of support scope
Package: kernel-rt (Red Hat Enterprise Linux 7) - Out of support scope
Pack
Debian
CVE-2021-47342: linux - In the Linux kernel, the following vulnerability has been resolved: ext4: fix p...
vendor_debian·2021·CVSS 7.8
CVE-2021-47342 [HIGH] CVE-2021-47342: linux - In the Linux kernel, the following vulnerability has been resolved: ext4: fix p...
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:
Scope: local
bookworm: resolved (fixed in 5.14.6-1)
bullseye: resolved (fixed in 5.10.84-1)
forky: resolved (fixed in 5.14.6-1)
sid: resolved (fixed in 5.14.6-1)
trixie: resolved (fixed in 5.14.6-1)
GHSA
GHSA-c5qq-qcr6-82vp: In the Linux kernel, the following vulnerability has been resolved:
ext4: fix possible UAF when remounting r/o a mmp-protected file system
After com
ghsa_unreviewed·2024-05-21
CVE-2021-47342 [HIGH] CWE-416 GHSA-c5qq-qcr6-82vp: In the Linux kernel, the following vulnerability has been resolved:
ext4: fix possible UAF when remounting r/o a mmp-protected file system
After com
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:
OSV
CVE-2021-47342: In the Linux kernel, the following vulnerability has been resolved: ext4: fix possible UAF when remounting r/o a mmp-protected file system After commi
osv·2024-05-21·CVSS 7.8
CVE-2021-47342 [HIGH] CVE-2021-47342: In the Linux kernel, the following vulnerability has been resolved: ext4: fix possible UAF when remounting r/o a mmp-protected file system After commi
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:
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/61bb4a1c417e5b95d9edb4f887f131de32e419cbhttps://git.kernel.org/stable/c/7ed572cdf11081f8f9e07abd4bea56a3f2c4edbdhttps://git.kernel.org/stable/c/b663890d854403e566169f7e90aed5cd6ff64f6bhttps://git.kernel.org/stable/c/61bb4a1c417e5b95d9edb4f887f131de32e419cbhttps://git.kernel.org/stable/c/7ed572cdf11081f8f9e07abd4bea56a3f2c4edbdhttps://git.kernel.org/stable/c/b663890d854403e566169f7e90aed5cd6ff64f6b
2024-05-21
Published