CVE-2026-43212

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43212", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.993Z", "datePublished": "2026-05-06T11:28:15.272Z", "dateUpdated": "2026-08-05T12:26:37.524Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:26:37.524Z"}, "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": [{"cvssV3_1": {"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"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable LoongArch macro is reached from local kernel interfaces and device/PMU/sysfs-style paths, not by remote network input.\nAC:L - Supplying or encountering NUMA_NO_NODE leads directly to an out-of-bounds cpus_on_node[-1] access; no attacker-uncontrolled race or timing condition is required.\nPR:L - A basic local user can plausibly trigger exposed local inspection/control paths once an affected device or subsystem instance exists. Where a specific path is admin-only, the macro bug itself is still reachable through normal local kernel-facing interfaces, so the higher-severity PR:L is selected.\nUI:N - No victim user action is needed beyond the attacker invoking the local interface.\nS:U - The impact remains within the kernel and its managed resources; there is no guest-to-host, IOMMU, or other separate security authority boundary crossing.\nC:H - The bug is an out-of-bounds read of a cpumask object before the cpus_on_node array, and cpumask data may be exposed or used through sysfs/perf-style paths.\nI:H - The invalid cpumask pointer can be consumed by cpumask helpers and affinity-setting paths, and an array-underflow kernel memory access is treated as potentially enabling corruption or control of kernel decisions.\nA:H - Invalid cpumask access can produce UBSAN/oops/panic behavior or destabilize kernel CPU-affinity handling, giving high availability impact."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/loongarch/include/asm/topology.h"], "versions": [{"version": "d4b6f1562a3c3284adcef81d6e4f183d7d34b8a9", "lessThan": "b5bf05e05cdf489a04137e4da407de9d4cca5295", "status": "affected", "versionType": "git"}, {"version": "d4b6f1562a3c3284adcef81d6e4f183d7d34b8a9", "lessThan": "bb1a54f7f011f19ed936632698eae574e0b91063", "status": "affected", "versionType": "git"}, {"version": "d4b6f1562a3c3284adcef81d6e4f183d7d34b8a9", "lessThan": "92adfb707beec0fe956424373654a70aad35ea13", "status": "affected", "versionType": "git"}, {"version": "d4b6f1562a3c3284adcef81d6e4f183d7d34b8a9", "lessThan": "61a56df2fbaad3a4d00f0c6a904b5d1ee8982eb4", "status": "affected", "versionType": "git"}, {"version": "d4b6f1562a3c3284adcef81d6e4f183d7d34b8a9", "lessThan": "1d8f2f024801019d85159a020b72a4424b46bcf4", "status": "affected", "versionType": "git"}, {"version": "d4b6f1562a3c3284adcef81d6e4f183d7d34b8a9", "lessThan": "94b0c831eda778ae9e4f2164a8b3de485d8977bb", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/loongarch/include/asm/topology.h"], "versions": [{"version": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.16", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.6", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.1.165"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.18.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.19.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b5bf05e05cdf489a04137e4da407de9d4cca5295"}, {"url": "https://git.kernel.org/stable/c/bb1a54f7f011f19ed936632698eae574e0b91063"}, {"url": "https://git.kernel.org/stable/c/92adfb707beec0fe956424373654a70aad35ea13"}, {"url": "https://git.kernel.org/stable/c/61a56df2fbaad3a4d00f0c6a904b5d1ee8982eb4"}, {"url": "https://git.kernel.org/stable/c/1d8f2f024801019d85159a020b72a4424b46bcf4"}, {"url": "https://git.kernel.org/stable/c/94b0c831eda778ae9e4f2164a8b3de485d8977bb"}], "title": "LoongArch: Make cpumask_of_node() robust against NUMA_NO_NODE", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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so add a check for this."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nLoongArch: Hacer cpumask_of_node() robusto contra NUMA_NO_NODE\n\nLa definici\u00f3n de arquitectura de cpumask_of_node() no puede manejar NUMA_NO_NODE - que es un \u00edndice v\u00e1lido - as\u00ed que a\u00f1ade una comprobaci\u00f3n para esto."}], "id": "CVE-2026-43212", "lastModified": "2026-11-11T20:10:00.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-06T12:16:40.687", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "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"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: LoongArch: Make cpumask_of_node() robust against NUMA_NO_NODE", "id": "2467153", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467153"}, "csaw": false, "cwe": "CWE-1285", "details": ["A flaw was found in the Linux kernel, specifically within the `cpumask_of_node()` function on the LoongArch architecture. This function did not properly handle the `NUMA_NO_NODE` index, which is a valid input. This oversight could lead to unexpected system behavior or instability, potentially impacting resource management within the kernel."], "name": "CVE-2026-43212", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43212\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43212\nhttps://lore.kernel.org/linux-cve-announce/2026050649-CVE-2026-43212-5cc5@gregkh/T"]}

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