CVE-2021-47340

Severity CVSS v4.0:

Pending analysis

Type:

CWE-476 NULL Pointer Dereference

Publication date:

21/05/2024

Last modified:

10/12/2025

Description

In the Linux kernel, the following vulnerability has been resolved: jfs: fix GPF in diFree Avoid passing inode with JFS_SBI(inode->i_sb)->ipimap == NULL to diFree()[1]. GFP will appear: struct inode *ipimap = JFS_SBI(ip->i_sb)->ipimap; struct inomap *imap = JFS_IP(ipimap)->i_imap; JFS_IP() will return invalid pointer when ipimap == NULL Call Trace: diFree+0x13d/0x2dc0 fs/jfs/jfs_imap.c:853 [1] jfs_evict_inode+0x2c9/0x370 fs/jfs/inode.c:154 evict+0x2ed/0x750 fs/inode.c:578 iput_final fs/inode.c:1654 [inline] iput.part.0+0x3fe/0x820 fs/inode.c:1680 iput+0x58/0x70 fs/inode.c:1670

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::		4.4.276 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.5 (including)	4.9.276 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.10 (including)	4.14.240 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.15 (including)	4.19.198 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.20 (including)	5.4.133 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.51 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.12.18 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.13 (including)	5.13.3 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-47340

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools