Description
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().
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
564e871aa66f548a947b23808d3140f326381f0c to < b4975f2ff6c82adc24ae547f029f82530ba43cfeaffected564e871aa66f548a947b23808d3140f326381f0c to < 6030597ec683d1e5b46445f888bb5c7776b5a0c4affected564e871aa66f548a947b23808d3140f326381f0c to < 1c391696d2791f82ae462e11da9a0d96f90b240caffected564e871aa66f548a947b23808d3140f326381f0c to < 93967bfb17dab66642c57e609c99e1a91fe11278affected564e871aa66f548a947b23808d3140f326381f0c to < e057efcc9c71d90099d9ee00bed0748d0e9fd586affected564e871aa66f548a947b23808d3140f326381f0c to < 09e649117c54b7e1c004f22eaa19efbadd9ac856affected564e871aa66f548a947b23808d3140f326381f0c to < 69a734359639fca16a0dd73ab17a34943e76c68baffected564e871aa66f548a947b23808d3140f326381f0c to < 037770686126155eafc44501312989e2837b9659affected
Linux Linux
Default version status: affected
4.13affected0 to < 4.13unaffected5.10.270 to ≤ 5.10.*unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.109 to ≤ 6.12.*unaffected6.18.50 to ≤ 6.18.*unaffected7.2.4 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
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 ↗