CVE-2023-52450

perf/x86/intel/uncore: Fix NULL pointer dereference issue in upi_fill_topology()

MEDIUM
5.5
CVSS Score
Published: February 22, 2024 at 04:21 PM UTC
Updated: June 17, 2026 at 06:42 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel/uncore: Fix NULL pointer dereference issue in upi_fill_topology() Get logical socket id instead of physical id in discover_upi_topology() to avoid out-of-bound access on 'upi = &type->topology[nid][idx];' line that leads to NULL pointer dereference in upi_fill_topology()

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

6.2 ≤ v < 6.6.146.2 ≤ v < 6.7.26.2 ≤ v < 6.86.2.0 ≤ v < 6.6.146.7.0 ≤ v < 6.7.26.2f680b6e6062ef3c944ffc966d685f067958fca33
Vendor states this is fixed in 1692cf434ba13ee212495b5af795b6a07e986ce4 (fixed)
Vendor states this is fixed in 3d6f4a78b104c65e4256c3776c9949f49a1b459e (fixed)
Vendor states this is fixed in bf1bf09e6b599758851457f3999779622a48d015 (fixed)
Vendor states this is fixed in 6.2 (unaffected)
Vendor states this is fixed in 6.6.14 (unaffected)
Vendor states this is fixed in 6.7.2 (unaffected)
Vendor states this is fixed in 6.8 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/1692cf434ba13ee212495b5af795b6a07e986ce4
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/3d6f4a78b104c65e4256c3776c9949f49a1b459e
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/bf1bf09e6b599758851457f3999779622a48d015

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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