PT-2025-40203 · Linux+1 · Linux Kernel+1
Published
2023-08-07
·
Updated
2025-11-19
·
CVE-2023-53496
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The UV code in the Linux kernel attempts to create tables for bidirectional socket to node lookups. When the number of CPUs (
nr cpus) is set lower than the actual number of CPUs present, the cpu to node() mapping information for unused CPUs is unavailable during table creation. This can lead to skipping nodes or sockets, resulting in errors when the code encounters these missing entries. The issue arises from looping over all CPUs instead of directly using APICIDs mapped to valid NUMA nodes to extract socket IDs. This approach avoids errors related to disabled CPUs.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Infinite Loop
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Weakness Enumeration
Related Identifiers
Affected Products
Linux Kernel
Suse