CVE-2026-43079 Details
Description
In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel/uncore: Skip discovery table for offline dies This warning can be triggered if NUMA is disabled and the system boots with fewer CPUs than the number of CPUs in die 0. WARNING: CPU: 9 PID: 7257 at uncore.c:1157 uncore_pci_pmu_register+0x136/0x160 [intel_uncore] Currently, the discovery table continues to be parsed even if all CPUs in the associated die are offline. This can lead to an array overflow at "pmu->boxes[die] = box" in uncore_pci_pmu_register(), which may trigger the warning above or cause other issues.
A vulnerability in the Linux kernel's uncore performance monitoring unit (PMU) handling can lead to issues when the system boots with fewer CPUs than expected, particularly in environments where Non-Uniform Memory Access (NUMA) is disabled. This situation can cause the uncore discovery table to be improperly parsed, even when all CPUs in a given die are offline. The incorrect parsing can result in an array overflow, potentially triggering warnings or causing other unspecified problems.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been addressed. Instructions for downloading the patched kernel can be found on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/6cfc187d85f18f976d0fe527d4c6f6171542cc19 | kernel.org | Patch |
| https://git.kernel.org/stable/c/7a2cb02437d92ed14fe494d8994056d5bd2c72b4 | kernel.org | Patch |
| https://git.kernel.org/stable/c/7b568e9eba2fad89a696f22f0413d44cf4a1f892 | kernel.org | Patch |
| https://git.kernel.org/stable/c/cfab2c817d2e7e0bee98d66850246ce842ed5f18 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d18da11a5e21eac7651c8897e5e0908f6c2bc9de | kernel.org | Patch |
| https://git.kernel.org/stable/c/dfcba8c8674cead6c88a2f269b71aa4efd3d384a | kernel.org | Patch |
| https://git.kernel.org/stable/c/f34feda8e0c9535fee3f8870ce8bab53c2798f71 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.13, < 5.15.209 >= 5.16, < 6.1.175 >= 6.2, < 6.6.136 >= 6.7, < 6.12.83 >= 6.13, < 6.18.24 >= 6.19, < 6.19.14 7.0 rc1 7.0 rc2 7.0 rc3 7.0 rc4 7.0 rc5 7.0 rc6 7.0 rc7 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 1, 2026 | Initial Analysis | [email protected] |
| Jun 1, 2026 | CVE Modified | kernel.org |
| May 6, 2026 | New CVE Received | kernel.org |