Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV L L L N U N N H 5.5 .0016 4.7 —
AFFECTED Product Versions Fixed Linux 9a7832ce3d920426a36cdd78eda4b3568d4d09e3 – — Linux 5.12 – 6.6.157
TIMELINE May 1 Reserved by Linux May 8 Published (CNA: Linux) Sep 7 ENRICHED — CVE-2026-43344 (Linux). Received CVSS 5.5 and CPE data from NVD.
In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel/uncore: Fix die ID init and look up bugs In snbep_pci2phy_map_init(), in the nr_node_ids > 8 path, uncore_device_to_die() may return -1 when all CPUs associated with the UBOX device are offline. Remove the WARN_ON_ONCE(die_id == -1) check for two reasons: - The current code breaks out of the loop. This is incorrect because pci_get_device() does not guarantee iteration in domain or bus order, so additional UBOX devices may be skipped during the scan. - Returning -EINVAL is incorrect, since marking offline buses with die_id == -1 is expected and should not be treated as an error. Separately, when NUMA is disabled on a NUMA-capable platform, pcibus_to_node() returns NUMA_NO_NODE, causing uncore_device_to_die() to return -1 for all PCI devices. As a result, spr_update_device_location(), used on Intel SPR and EMR, ignores the corresponding PMON units and does not add them to the RB tree. Fix this by using uncore_pcibus_to_dieid(), which retrieves topology from the UBOX GIDNIDMAP register and works regardless of whether NUMA is enabled in Linux. This requires snbep_pci2phy_map_init() to be added in spr_uncore_pci_init(). Keep uncore_device_to_die() only for the nr_node_ids > 8 case, where NUMA is expected to be enabled.
| Date | Event | Detail |
|---|---|---|
| May 1, 2026 | Reserved | Reserved by Linux |
| May 8, 2026 | Published | Published (CNA: Linux) |
| September 7, 2026 | ENRICHED | ENRICHED — CVE-2026-43344 (Linux). Received CVSS 5.5 and CPE data from NVD. |
Authoritative record: CVE-2026-43344 at cve.org
Vendors: linux
Weaknesses: CWE-617
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-43344 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
