{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89559", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.724Z", "datePublished": "2026-09-11T19:44:31.337Z", "dateUpdated": "2026-09-11T19:44:31.337Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:44:31.337Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibnvdimm/labels: Prevent integer overflow in __nd_label_validate()\n\nThe on-media namespace index field nslot is a u32 read from the DIMM\nlabel storage area. __nd_label_validate() bounds it against the config\narea size, but sizeof_namespace_label() returns unsigned, so the product\nnslot * label_size is evaluated in 32-bit and wraps modulo 2^32 before\nthe comparison. A crafted nslot passes the bound and is then used as the\nloop trip count in nd_label_data_init(), whose memset() walks off the end\nof the config_size buffer: an out-of-bounds write.\n\nThe field is not trusted -- it comes from the medium, or from userspace\nvia ND_CMD_SET_CONFIG_DATA. Evaluate the product in 64-bit so the bound\ncheck is exact; conforming labels are unaffected.\n\nThe check was safe when introduced by commit 4a826c83db4e (\"libnvdimm:\nnamespace indices: read and validate\"): it multiplied by sizeof(struct\nnd_namespace_label), a size_t, so on a 64-bit build the product did not\nwrap. Commit 564e871aa66f (\"libnvdimm, label: add v1.2 nvdimm label\ndefinitions\") narrowed it to 32 bits when the label size became a runtime\nvalue read via sizeof_namespace_label()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvdimm/label.c"], "versions": [{"version": "564e871aa66f548a947b23808d3140f326381f0c", "lessThan": "e057efcc9c71d90099d9ee00bed0748d0e9fd586", "status": "affected", "versionType": "git"}, {"version": "564e871aa66f548a947b23808d3140f326381f0c", "lessThan": "09e649117c54b7e1c004f22eaa19efbadd9ac856", "status": "affected", "versionType": "git"}, {"version": "564e871aa66f548a947b23808d3140f326381f0c", "lessThan": "69a734359639fca16a0dd73ab17a34943e76c68b", "status": "affected", "versionType": "git"}, {"version": "564e871aa66f548a947b23808d3140f326381f0c", "lessThan": "037770686126155eafc44501312989e2837b9659", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvdimm/label.c"], "versions": [{"version": "4.13", "status": "affected"}, {"version": "0", "lessThan": "4.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "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": "4.13", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e057efcc9c71d90099d9ee00bed0748d0e9fd586"}, {"url": "https://git.kernel.org/stable/c/09e649117c54b7e1c004f22eaa19efbadd9ac856"}, {"url": "https://git.kernel.org/stable/c/69a734359639fca16a0dd73ab17a34943e76c68b"}, {"url": "https://git.kernel.org/stable/c/037770686126155eafc44501312989e2837b9659"}], "title": "libnvdimm/labels: Prevent integer overflow in __nd_label_validate()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/nvdimm/label.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e057efcc9c71d90099d9ee00bed0748d0e9fd586", "status": "affected", "version": "564e871aa66f548a947b23808d3140f326381f0c", "versionType": "git"}, {"lessThan": "09e649117c54b7e1c004f22eaa19efbadd9ac856", "status": "affected", "version": "564e871aa66f548a947b23808d3140f326381f0c", "versionType": "git"}, {"lessThan": "69a734359639fca16a0dd73ab17a34943e76c68b", "status": "affected", "version": "564e871aa66f548a947b23808d3140f326381f0c", "versionType": "git"}, {"lessThan": "037770686126155eafc44501312989e2837b9659", "status": "affected", "version": "564e871aa66f548a947b23808d3140f326381f0c", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/nvdimm/label.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.13"}, {"lessThan": "4.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibnvdimm/labels: Prevent integer overflow in __nd_label_validate()\n\nThe on-media namespace index field nslot is a u32 read from the DIMM\nlabel storage area. __nd_label_validate() bounds it against the config\narea size, but sizeof_namespace_label() returns unsigned, so the product\nnslot * label_size is evaluated in 32-bit and wraps modulo 2^32 before\nthe comparison. A crafted nslot passes the bound and is then used as the\nloop trip count in nd_label_data_init(), whose memset() walks off the end\nof the config_size buffer: an out-of-bounds write.\n\nThe field is not trusted -- it comes from the medium, or from userspace\nvia ND_CMD_SET_CONFIG_DATA. Evaluate the product in 64-bit so the bound\ncheck is exact; conforming labels are unaffected.\n\nThe check was safe when introduced by commit 4a826c83db4e (\"libnvdimm:\nnamespace indices: read and validate\"): it multiplied by sizeof(struct\nnd_namespace_label), a size_t, so on a 64-bit build the product did not\nwrap. Commit 564e871aa66f (\"libnvdimm, label: add v1.2 nvdimm label\ndefinitions\") narrowed it to 32 bits when the label size became a runtime\nvalue read via sizeof_namespace_label()."}], "id": "CVE-2026-89559", "lastModified": "2026-09-11T20:19:39.673", "metrics": {}, "published": "2026-09-11T20:19:39.673", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/037770686126155eafc44501312989e2837b9659"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/09e649117c54b7e1c004f22eaa19efbadd9ac856"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/69a734359639fca16a0dd73ab17a34943e76c68b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e057efcc9c71d90099d9ee00bed0748d0e9fd586"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Out-of-bounds write in libnvdimm/labels due to integer overflow", "id": "2532126", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532126"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's `libnvdimm/labels` component. An integer overflow vulnerability exists in the `__nd_label_validate()` function, where a 32-bit calculation of a namespace index field (`nslot`) can wrap around. This allows a local attacker, or an attacker with control over the storage medium, to provide a specially crafted `nslot` value. This crafted value can bypass security checks, leading to an out-of-bounds write and potential memory corruption."], "name": "CVE-2026-89559", "public_date": "2026-09-11T19:44:31Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89559\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89559\nhttps://git.kernel.org/stable/c/037770686126155eafc44501312989e2837b9659\nhttps://git.kernel.org/stable/c/09e649117c54b7e1c004f22eaa19efbadd9ac856\nhttps://git.kernel.org/stable/c/69a734359639fca16a0dd73ab17a34943e76c68b\nhttps://git.kernel.org/stable/c/e057efcc9c71d90099d9ee00bed0748d0e9fd586"], "threat_severity": "Moderate"}

{}