Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2023-52522

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
02/03/2024
Last modified:
06/11/2024

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net: fix possible store tearing in neigh_periodic_work()<br /> <br /> While looking at a related syzbot report involving neigh_periodic_work(),<br /> I found that I forgot to add an annotation when deleting an<br /> RCU protected item from a list.<br /> <br /> Readers use rcu_deference(*np), we need to use either<br /> rcu_assign_pointer() or WRITE_ONCE() on writer side<br /> to prevent store tearing.<br /> <br /> I use rcu_assign_pointer() to have lockdep support,<br /> this was the choice made in neigh_flush_dev().

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

References to Advisories, Solutions, and Tools