CVE-2021-47335
published 2024-05-21CVE-2021-47335: In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances As syzbot…
PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
14.2th percentile
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances
As syzbot reported, there is an use-after-free issue during f2fs recovery:
Use-after-free write at 0xffff88823bc16040 (in kfence-#10):
kmem_cache_destroy+0x1f/0x120 mm/slab_common.c:486
f2fs_recover_fsync_data+0x75b0/0x8380 fs/f2fs/recovery.c:869
f2fs_fill_super+0x9393/0xa420 fs/f2fs/super.c:3945
mount_bdev+0x26c/0x3a0 fs/super.c:1367
legacy_get_tree+0xea/0x180 fs/fs_context.c:592
vfs_get_tree+0x86/0x270 fs/super.c:1497
do_new_mount fs/namespace.c:2905 [inline]
path_mount+0x196f/0x2be0 fs/namespace.c:3235
do_mount fs/namespace.c:3248 [inline]
__do_sys_mount fs/namespace.c:3456 [inline]
__se_sys_mount+0x2f9/0x3b0 fs/namespace.c:3433
do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
The root cause is multi f2fs filesystem instances can race on accessing
global fsync_entry_slab pointer, result in use-after-free issue of slab
cache, fixes to init/destroy this slab cache only once during module
init/destroy procedure to avoid this issue.
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 | >= 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < 86786603014e0a22d0d6af8e80ae4b8687927048 | 86786603014e0a22d0d6af8e80ae4b8687927048 |
| linux | linux | >= 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < 79fa5d944c875711253a23b8155b36883c696409 | 79fa5d944c875711253a23b8155b36883c696409 |
| linux | linux | >= 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < e472b276a0d2180808009be38105e12754432e2a | e472b276a0d2180808009be38105e12754432e2a |
| linux | linux | >= 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < cad83c968c2ebe97905f900326988ed37146c347 | cad83c968c2ebe97905f900326988ed37146c347 |
| linux | linux_kernel | < 5.10.51 | 5.10.51 |
| linux | linux_kernel | >= 0 < 5.10.70-1 | 5.10.70-1 |
| 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 < 5.12.18 | 5.12.18 |
| linux | linux_kernel | >= 5.13 < 5.13.3 | 5.13.3 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
kernel: f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances
vendor_redhat·2024-05-21·CVSS 5.5
CVE-2021-47335 [MEDIUM] CWE-416 kernel: f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances
kernel: f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances
As syzbot reported, there is an use-after-free issue during f2fs recovery:
Use-after-free write at 0xffff88823bc16040 (in kfence-#10):
kmem_cache_destroy+0x1f/0x120 mm/slab_common.c:486
f2fs_recover_fsync_data+0x75b0/0x8380 fs/f2fs/recovery.c:869
f2fs_fill_super+0x9393/0xa420 fs/f2fs/super.c:3945
mount_bdev+0x26c/0x3a0 fs/super.c:1367
legacy_get_tree+0xea/0x180 fs/fs_context.c:592
vfs_get_tree+0x86/0x270 fs/super.c:1497
do_new_mount fs/namespace.c:2905 [inline]
path_mount+0x196f/0x2be0 fs/namespace.c:3235
do_mount fs/namespace.c:3248 [inline]
__do_sys_mount fs/name
Debian
CVE-2021-47335: linux - In the Linux kernel, the following vulnerability has been resolved: f2fs: fix t...
vendor_debian·2021·CVSS 5.5
CVE-2021-47335 [MEDIUM] CVE-2021-47335: linux - In the Linux kernel, the following vulnerability has been resolved: f2fs: fix t...
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances As syzbot reported, there is an use-after-free issue during f2fs recovery: Use-after-free write at 0xffff88823bc16040 (in kfence-#10): kmem_cache_destroy+0x1f/0x120 mm/slab_common.c:486 f2fs_recover_fsync_data+0x75b0/0x8380 fs/f2fs/recovery.c:869 f2fs_fill_super+0x9393/0xa420 fs/f2fs/super.c:3945 mount_bdev+0x26c/0x3a0 fs/super.c:1367 legacy_get_tree+0xea/0x180 fs/fs_context.c:592 vfs_get_tree+0x86/0x270 fs/super.c:1497 do_new_mount fs/namespace.c:2905 [inline] path_mount+0x196f/0x2be0 fs/namespace.c:3235 do_mount fs/namespace.c:3248 [inline] __do_sys_mount fs/namespace.c:3456 [inline] __se_sys_mount+0x2f9/0x3b0 fs/namespace.c:3433 do_syscall_64+0x
OSV
CVE-2021-47335: In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances As syz
osv·2024-05-21·CVSS 5.5
CVE-2021-47335 [MEDIUM] CVE-2021-47335: In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances As syz
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances As syzbot reported, there is an use-after-free issue during f2fs recovery: Use-after-free write at 0xffff88823bc16040 (in kfence-#10): kmem_cache_destroy+0x1f/0x120 mm/slab_common.c:486 f2fs_recover_fsync_data+0x75b0/0x8380 fs/f2fs/recovery.c:869 f2fs_fill_super+0x9393/0xa420 fs/f2fs/super.c:3945 mount_bdev+0x26c/0x3a0 fs/super.c:1367 legacy_get_tree+0xea/0x180 fs/fs_context.c:592 vfs_get_tree+0x86/0x270 fs/super.c:1497 do_new_mount fs/namespace.c:2905 [inline] path_mount+0x196f/0x2be0 fs/namespace.c:3235 do_mount fs/namespace.c:3248 [inline] __do_sys_mount fs/namespace.c:3456 [inline] __se_sys_mount+0x2f9/0x3b0 fs/namespace.c:3433 do_syscall_64+0x
GHSA
GHSA-x56w-x8rv-273m: In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances
As s
ghsa_unreviewed·2024-05-21
CVE-2021-47335 [MEDIUM] CWE-416 GHSA-x56w-x8rv-273m: In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances
As s
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances
As syzbot reported, there is an use-after-free issue during f2fs recovery:
Use-after-free write at 0xffff88823bc16040 (in kfence-#10):
kmem_cache_destroy+0x1f/0x120 mm/slab_common.c:486
f2fs_recover_fsync_data+0x75b0/0x8380 fs/f2fs/recovery.c:869
f2fs_fill_super+0x9393/0xa420 fs/f2fs/super.c:3945
mount_bdev+0x26c/0x3a0 fs/super.c:1367
legacy_get_tree+0xea/0x180 fs/fs_context.c:592
vfs_get_tree+0x86/0x270 fs/super.c:1497
do_new_mount fs/namespace.c:2905 [inline]
path_mount+0x196f/0x2be0 fs/namespace.c:3235
do_mount fs/namespace.c:3248 [inline]
__do_sys_mount fs/namespace.c:3456 [inline]
__se_sys_mount+0x2f9/0x3b0 fs/namespace.c:3433
do_syscall_64
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/79fa5d944c875711253a23b8155b36883c696409https://git.kernel.org/stable/c/86786603014e0a22d0d6af8e80ae4b8687927048https://git.kernel.org/stable/c/cad83c968c2ebe97905f900326988ed37146c347https://git.kernel.org/stable/c/e472b276a0d2180808009be38105e12754432e2ahttps://git.kernel.org/stable/c/79fa5d944c875711253a23b8155b36883c696409https://git.kernel.org/stable/c/86786603014e0a22d0d6af8e80ae4b8687927048https://git.kernel.org/stable/c/cad83c968c2ebe97905f900326988ed37146c347https://git.kernel.org/stable/c/e472b276a0d2180808009be38105e12754432e2a
2024-05-21
Published