{"id":"CVE-2026-89559","revision":"afe50321b51c4fba81ef6270fa8bcd49","records":[{"revision":"afe50321b51c4fba81ef6270fa8bcd49","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89559","aliases":[],"title":"libnvdimm/labels: Prevent integer overflow in __nd_label_validate()","description":"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().","state":0,"publishedAt":"2026-09-11T19:44:31.337+00:00","modifiedAt":"2026-10-19T08:48:52.683+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/nvdimm/label.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"564e871aa66f548a947b23808d3140f326381f0c\",\n                            \"lessThan\": \"b4975f2ff6c82adc24ae547f029f82530ba43cfe\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"564e871aa66f548a947b23808d3140f326381f0c\",\n                            \"lessThan\": \"6030597ec683d1e5b46445f888bb5c7776b5a0c4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"564e871aa66f548a947b23808d3140f326381f0c\",\n                            \"lessThan\": \"1c391696d2791f82ae462e11da9a0d96f90b240c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"564e871aa66f548a947b23808d3140f326381f0c\",\n                            \"lessThan\": \"93967bfb17dab66642c57e609c99e1a91fe11278\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"564e871aa66f548a947b23808d3140f326381f0c\",\n                            \"lessThan\": \"e057efcc9c71d90099d9ee00bed0748d0e9fd586\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"564e871aa66f548a947b23808d3140f326381f0c\",\n                            \"lessThan\": \"09e649117c54b7e1c004f22eaa19efbadd9ac856\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"564e871aa66f548a947b23808d3140f326381f0c\",\n                            \"lessThan\": \"69a734359639fca16a0dd73ab17a34943e76c68b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"564e871aa66f548a947b23808d3140f326381f0c\",\n                            \"lessThan\": \"037770686126155eafc44501312989e2837b9659\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/nvdimm/label.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.13\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.13\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/b4975f2ff6c82adc24ae547f029f82530ba43cfe","https://git.kernel.org/stable/c/6030597ec683d1e5b46445f888bb5c7776b5a0c4","https://git.kernel.org/stable/c/1c391696d2791f82ae462e11da9a0d96f90b240c","https://git.kernel.org/stable/c/93967bfb17dab66642c57e609c99e1a91fe11278","https://git.kernel.org/stable/c/e057efcc9c71d90099d9ee00bed0748d0e9fd586","https://git.kernel.org/stable/c/09e649117c54b7e1c004f22eaa19efbadd9ac856","https://git.kernel.org/stable/c/69a734359639fca16a0dd73ab17a34943e76c68b","https://git.kernel.org/stable/c/037770686126155eafc44501312989e2837b9659"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89559","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89559","identifiers":["CVE-2026-89559"]},"retained":false,"historicalAffected":[]}],"coverage":[]}