CVE-2026-43079
perf/x86/intel/uncore: Skip discovery table for offline dies
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.
INFO
Published Date :
May 6, 2026, 10:16 a.m.
Last Modified :
June 1, 2026, 5:27 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Linux kernel.
- Apply the provided patch for intel_uncore module.
- Verify the system boots with correct CPU configuration.
- Reboot the system after applying the update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-43079.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-43079 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-43079
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-43079 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-43079 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 01, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.24 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 6.19.14 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.83 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.136 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.13 up to (excluding) 5.15.209 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.175 Added Reference Type kernel.org: https://git.kernel.org/stable/c/6cfc187d85f18f976d0fe527d4c6f6171542cc19 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7a2cb02437d92ed14fe494d8994056d5bd2c72b4 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7b568e9eba2fad89a696f22f0413d44cf4a1f892 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/cfab2c817d2e7e0bee98d66850246ce842ed5f18 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d18da11a5e21eac7651c8897e5e0908f6c2bc9de Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/dfcba8c8674cead6c88a2f269b71aa4efd3d384a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/f34feda8e0c9535fee3f8870ce8bab53c2798f71 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 01, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/d18da11a5e21eac7651c8897e5e0908f6c2bc9de Added Reference https://git.kernel.org/stable/c/dfcba8c8674cead6c88a2f269b71aa4efd3d384a -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 06, 2026
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/6cfc187d85f18f976d0fe527d4c6f6171542cc19 Added Reference https://git.kernel.org/stable/c/7a2cb02437d92ed14fe494d8994056d5bd2c72b4 Added Reference https://git.kernel.org/stable/c/7b568e9eba2fad89a696f22f0413d44cf4a1f892 Added Reference https://git.kernel.org/stable/c/cfab2c817d2e7e0bee98d66850246ce842ed5f18 Added Reference https://git.kernel.org/stable/c/f34feda8e0c9535fee3f8870ce8bab53c2798f71