DEBIAN-CVE-2023-53496
- Source
- https://security-tracker.debian.org/tracker/CVE-2023-53496
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53496.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2023-53496
- Upstream
- Published
- 2025-10-01T12:15:52Z
- Modified
- 2025-10-02T09:01:20Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved: x86/platform/uv: Use alternate source for socket to node data The UV code attempts to build a set of tables to allow it to do bidirectional socket<=>node lookups. But when nrcpus is set to a smaller number than actually present, the cputonode() mapping information for unused CPUs is not available to buildsocket_tables(). This results in skipping some nodes or sockets when creating the tables and leaving some -1's for later code to trip. over, causing oopses. The problem is that the socket<=>node lookups are created by doing a loop over all CPUs, then looking up the CPU's APICID and socket. But if a CPU is not present, there is no way to start this lookup. Instead of looping over all CPUs, take CPUs out of the equation entirely. Loop over all APICIDs which are mapped to a valid NUMA node. Then just extract the socket-id from the APICID. This avoid tripping over disabled CPUs.
- References
Affected packages
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:14 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source