CVE-2021-47179

2024-03-2517:54:55

redhat.com

access.redhat.com

linux

kernel

vulnerability

nfsv4

null pointer

dereference

pnfs_mark_matching_lsegs_return

oops

ontap

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

Confidence

High

EPSS

Percentile

5.1%

JSON

A vulnerability in the Linux kernel’s NFSv4 subsystem caused a NULL pointer dereference in pnfs_mark_matching_lsegs_return(). This issue occurred because _pnfs_return_layout() passed a NULL pnfs_layout_range argument, which was not checked before dereferencing, leading to a system crash.

Mitigation

Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.