{ "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" } } } }