Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 564e871aa66f548a947b23808d3140f326381f0c before b4975f2ff6c82adc24ae547f029f82530ba43cfe; affected 564e871aa66f548a947b23808d3140f326381f0c before 6030597ec683d1e5b46445f888bb5c7776b5a0c4; affected 564e871aa66f548a947b23808d3140f326381f0c before 1c391696d2791f82ae462e11da9a0d96f90b240c; affected 564e871aa66f548a947b23808d3140f326381f0c before 93967bfb17dab66642c57e609c99e1a91fe11278; affected 564e871aa66f548a947b23808d3140f326381f0c before e057efcc9c71d90099d9ee00bed0748d0e9fd586; affected 564e871aa66f548a947b23808d3140f326381f0c before 09e649117c54b7e1c004f22eaa19efbadd9ac856; affected 564e871aa66f548a947b23808d3140f326381f0c before 69a734359639fca16a0dd73ab17a34943e76c68b; affected 564e871aa66f548a947b23808d3140f326381f0c before 037770686126155eafc44501312989e2837b9659 |
| Linux / Linux | affected 4.13; unaffected 0 before 4.13; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
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
ADP enrichment
No English description supplied.
No references supplied.