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CVE-2026-89559: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: libnvdimm/labels: Prevent integer overflow in __nd_label_validate() The on-media namespace index field nslot is a u32 read from the DIMM label storage area. __nd_label_validate() bounds it against the config area size, but sizeof_namespace_label() returns unsigned, so the product nslot * label_size is evaluated in 32-bit and wraps modulo 2^32 before the comparison. A crafted nslot passes the bound and is then used as the loop trip count in nd_label_data_init(), whose memset() walks off the end of the config_size buffer: an out-of-bounds write. The field is not trusted -- it comes from the medium, or from userspace via ND_CMD_SET_CONFIG_DATA. Evaluate the product in 64-bit so the bound check is exact; conforming labels are unaffected. The check was safe when introduced by commit 4a826c83db4e ("libnvdimm: namespace indices: read and validate"): it multiplied by sizeof(struct nd_namespace_label), a size_t, so on a 64-bit build the product did not wrap. Commit 564e871aa66f ("libnvdimm, label: add v1.2 nvdimm label definitions") narrowed it to 32 bits when the label size became a runtime value read via sizeof_namespace_label().

Засегнати продукти

  • Linux Linux: 564e871aa66f548a947b23808d3140f326381f0c преди b4975f2ff6c82adc24ae547f029f82530ba43cfe; 564e871aa66f548a947b23808d3140f326381f0c преди 6030597ec683d1e5b46445f888bb5c7776b5a0c4; 564e871aa66f548a947b23808d3140f326381f0c преди 1c391696d2791f82ae462e11da9a0d96f90b240c; 564e871aa66f548a947b23808d3140f326381f0c преди 93967bfb17dab66642c57e609c99e1a91fe11278; 564e871aa66f548a947b23808d3140f326381f0c преди e057efcc9c71d90099d9ee00bed0748d0e9fd586; 564e871aa66f548a947b23808d3140f326381f0c преди 09e649117c54b7e1c004f22eaa19efbadd9ac856; 564e871aa66f548a947b23808d3140f326381f0c преди 69a734359639fca16a0dd73ab17a34943e76c68b; 564e871aa66f548a947b23808d3140f326381f0c преди 037770686126155eafc44501312989e2837b9659
  • Linux Linux: 4.13; преди 4.13; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

История

  • 11 септември 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-89559: Linux | freedomonline.bg