CVE-2023-53450

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 36/100
Published: 2025-10-01 Modified: 2026-11-05 First seen: 2026-11-05 Status: active

Attack Surface

Low Complexity No Interaction

CVSS Vector Breakdown

AV: Local
AC: Low
PR: Low
UI: None
S: Unchanged
C: None
I: None
A: High

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: remove a BUG_ON in ext4_mb_release_group_pa() If a malicious fuzzer overwrites the ext4 superblock while it is mounted such that the s_first_data_block is set to a very large number, the calculation of the block group can underflow, and trigger a BUG_ON check. Change this to be an ext4_warning so that we don't crash the kernel.

Weakness Classification (1)

Affected Software (12)

VendorProductVersion
Linux Linux c9de560ded61faa5b754137b7753da252391c55a < d5bf8f7fb3ee3d99d1303ceb54599ea0599a4a5b
Linux Linux c9de560ded61faa5b754137b7753da252391c55a < ef16d8a1798db1a1604ac44ca1bd73ec6bebf483
Linux Linux c9de560ded61faa5b754137b7753da252391c55a < 185062a21976fbc38f2efd296951b02c4500cf65
Linux Linux c9de560ded61faa5b754137b7753da252391c55a < b0fc279de4bf17e1710bb7e83906538ff8f11111
Linux Linux c9de560ded61faa5b754137b7753da252391c55a < 978e5e9111af18741449b81fefd531a622dd969a
Linux Linux c9de560ded61faa5b754137b7753da252391c55a < d87a4e4094c9879fc8acdff8ce59fdffa979c8e0
Linux Linux c9de560ded61faa5b754137b7753da252391c55a < bf2a16eb4e6d06124bd8436d4546f61539a65f29
Linux Linux c9de560ded61faa5b754137b7753da252391c55a < 53c14e7cc2257191ba15425c15638fc4f8abb92b
Linux Linux c9de560ded61faa5b754137b7753da252391c55a < 463808f237cf73e98a1a45ff7460c2406a150a0b
Linux Linux 2.6.25
linux linux_kernel 2.6.25 – 4.14.315
linux linux_kernel 6.4

Bug Bounty Relevance

36 / 100
✓ Low complexity
✓ No user interaction

CVSS Score

5.5 / 10.0 v3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.16%
Raw Score 0.001630
Percentile 5.6%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00163
2026-11-13
0.00163
2026-11-12
0.00163
2026-11-10
0.00163
2026-11-09
0.00163
2026-11-08
0.00163
2026-11-07
0.00163
2026-11-06
0.00163
2026-11-05
0.00163

Intelligence Sources

mitre ref →
nvd ref →