Review reviewHigh

CVE-2023-53763

Linux

In the Linux kernel, the following vulnerability has been resolved: Revert "f2fs: fix to do sanity check on extent cache correctly" syzbot reports a f2fs bug as below: UBSAN: array-index-out-of-bounds in fs/f2fs/f2fs.h:3275:19 index 1409 is out of range for type '__le32[923]' (aka 'unsigned int[923]') Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:217 [inline] __ubsan_handle_out_of_bounds+0x11c/0x150 lib/ubsan.c:348 inline_data_addr fs/f2fs/f2fs.h:3275 [inline] __recover_inline_status fs/f2fs/inode.c:113 [inli...

CVSS: 7.8
EPSS: 0.14%
CISA KEV: Not listed
Published: 2025.12.08

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.14%

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= 85eb8b61dd4cfc7a839a0e86287b92ca6193444e < 0d545a8e77cbd1fbad311b18952e38e0f7672ab4, >= d48a7b3a72f121655d95b5157c32c7d555e44c05 < ea35767edc78327c686e21fe1231b668f11be0db, >= d48a7b3a72f121655d95b5157c32c7d555e44c05 < bbb3cd66301ef752fae2922452660f228d69bcaf, >= d48a7b3a72f121655d95b5157c32c7d555e44c05 < 958ccbbf1ce716d77c7cfa79ace50a421c1eed73, >= a3d1fd01250ffca88c11e9bd8d19be779acc7557, >= 6.1.29 < 6.1.53, >= 6.2.5 < 6.3, >= 6.3
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: Not available