In the Linux kernel, the following vulnerability has been resolved:

f2fs: fix to do sanity check on summary info

As Wenqing Liu reported in bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=216456

BUG: KASAN: use-after-free in recover_data+0x63ae/0x6ae0 [f2fs]
Read of size 4 at addr ffff8881464dcd80 by task mount/1013

CPU: 3 PID: 1013 Comm: mount Tainted: G W 6.0.0-rc4 #1
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0x45/0x5e
print_report.cold+0xf3/0x68d
kasan_report+0xa8/0x130
recover_data+0x63ae/0x6ae0 [f2fs]
f2fs_recover_fsync_data+0x120d/0x1fc0 [f2fs]
f2fs_fill_super+0x4665/0x61e0 [f2fs]
mount_bdev+0x2cf/0x3b0
legacy_get_tree+0xed/0x1d0
vfs_get_tree+0x81/0x2b0
path_mount+0x47e/0x19d0
do_mount+0xce/0xf0
__x64_sys_mount+0x12c/0x1a0
do_syscall_64+0x38/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd

The root cause is: in fuzzed image, SSA table is corrupted: ofs_in_node
is larger than ADDRS_PER_PAGE(), result in out-of-range access on 4k-size
page.

- recover_data
- do_recover_data
- check_index_in_prev_nodes
- f2fs_data_blkaddr

This patch adds sanity check on summary info in recovery and GC flow
in where the flows rely on them.

After patch:
[ 29.310883] F2FS-fs (loop0): Inconsistent ofs_in_node:65286 in summary, ino:0, nid:6, max:1018

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00035.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
b292dcab068e141d8a820b77cbcc88d98c610eb4 affected < c99860f9a75079f339ed7670425b1ac58f26e2ff
b292dcab068e141d8a820b77cbcc88d98c610eb4 affected < 4a8e8bf280703e04e0b9d91f101e1fdd9a5bd09e
b292dcab068e141d8a820b77cbcc88d98c610eb4 affected < 73687c53919f49dff3852155621dab7a35c52854
b292dcab068e141d8a820b77cbcc88d98c610eb4 affected < e168f819bfa42459b14f479e55ebd550bcc78899
b292dcab068e141d8a820b77cbcc88d98c610eb4 affected < 0922ad64ccefa3e483e84355942b86e13c8fea68
b292dcab068e141d8a820b77cbcc88d98c610eb4 affected < c6ad7fd16657ebd34a87a97d9588195aae87597d
Linux Linux affected
Version Status Constraints
3.11 affected —
0 unaffected < 3.11
5.4.220 unaffected ≤ 5.4.*
5.10.150 unaffected ≤ 5.10.*
5.15.75 unaffected ≤ 5.15.*
5.19.17 unaffected ≤ 5.19.*
6.0.3 unaffected ≤ 6.0.*
6.1 unaffected ≤ *

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References
Link Providers
https://git.kernel.org/stable/c/0922ad64ccefa3e483e84355942b86e13c8fea68 cve-icon cve-icon
https://git.kernel.org/stable/c/4a8e8bf280703e04e0b9d91f101e1fdd9a5bd09e cve-icon cve-icon
https://git.kernel.org/stable/c/73687c53919f49dff3852155621dab7a35c52854 cve-icon cve-icon
https://git.kernel.org/stable/c/c6ad7fd16657ebd34a87a97d9588195aae87597d cve-icon cve-icon
https://git.kernel.org/stable/c/c99860f9a75079f339ed7670425b1ac58f26e2ff cve-icon cve-icon
https://git.kernel.org/stable/c/e168f819bfa42459b14f479e55ebd550bcc78899 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025122452-CVE-2022-50753-6266@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2022-50753 cve-icon
https://www.cve.org/CVERecord?id=CVE-2022-50753 cve-icon
History

Thu, 25 Dec 2025 00:15:00 +0000

Type Values Removed Values Added
References

Wed, 24 Dec 2025 13:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on summary info As Wenqing Liu reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216456 BUG: KASAN: use-after-free in recover_data+0x63ae/0x6ae0 [f2fs] Read of size 4 at addr ffff8881464dcd80 by task mount/1013 CPU: 3 PID: 1013 Comm: mount Tainted: G W 6.0.0-rc4 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014 Call Trace: dump_stack_lvl+0x45/0x5e print_report.cold+0xf3/0x68d kasan_report+0xa8/0x130 recover_data+0x63ae/0x6ae0 [f2fs] f2fs_recover_fsync_data+0x120d/0x1fc0 [f2fs] f2fs_fill_super+0x4665/0x61e0 [f2fs] mount_bdev+0x2cf/0x3b0 legacy_get_tree+0xed/0x1d0 vfs_get_tree+0x81/0x2b0 path_mount+0x47e/0x19d0 do_mount+0xce/0xf0 __x64_sys_mount+0x12c/0x1a0 do_syscall_64+0x38/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd The root cause is: in fuzzed image, SSA table is corrupted: ofs_in_node is larger than ADDRS_PER_PAGE(), result in out-of-range access on 4k-size page. - recover_data - do_recover_data - check_index_in_prev_nodes - f2fs_data_blkaddr This patch adds sanity check on summary info in recovery and GC flow in where the flows rely on them. After patch: [ 29.310883] F2FS-fs (loop0): Inconsistent ofs_in_node:65286 in summary, ino:0, nid:6, max:1018
Title f2fs: fix to do sanity check on summary info
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-01-02T15:04:24.807Z

Reserved: 2025-12-24T13:02:21.544Z

Link: CVE-2022-50753

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-24T13:16:02.033

Modified: 2025-12-29T15:58:34.503

Link: CVE-2022-50753

cve-icon Redhat

Severity :

Publid Date: 2025-12-24T00:00:00Z

Links: CVE-2022-50753 - Bugzilla

cve-icon OpenCVE Enrichment

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Weaknesses

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