CVE-2023-54185

kernel: btrfs: remove BUG_ON()'s in add_new_free_space()

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Severity

Low

Red Hat Product Security

4.7

CVSS 3.1

Review impact separately from score.

Published · December 30, 2025

Updated · June 30, 2026

Description

The Btrfs filesystem contains BUG_ON() calls in add_new_free_space() that crash the kernel when memory allocation fails. This change replaces panic-inducing BUG_ON() with proper error handling.

Statement

The BUG_ON() calls are triggered by rare memory allocation failures. While the crash is a denial of service, exploiting it requires creating memory pressure during specific Btrfs operations. The fix converts these to recoverable errors.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 4.7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-617 · Reachable Assertion