CVE-2026-53391

Severity CVSS v4.0:

Pending analysis

Type:

CWE-476 NULL Pointer Dereference

Publication date:

19/07/2026

Last modified:

17/08/2026

Description

In the Linux kernel, the following vulnerability has been resolved: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr nfs4_decode_mp_ds_addr() decodes the r_netid and r_addr opaques of a netaddr4 from a GETDEVICEINFO multipath-DS body, then immediately calls strrchr(buf, &#39;.&#39;) to locate the port separator. Both decodes use xdr_stream_decode_string_dup(), and the current code checks only "nlen

Impact

Vector 3.x

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

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x

7.50

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	4.0 (including)	5.15.211 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.177 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.144 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.95 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.18.38 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.19 (including)	7.1.3 (excluding)

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

CVE-2026-53391

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools