ghsa-6gcc-wg3c-rg44
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
libnvdimm/labels: Fix divide error in nd_label_data_init()
If a faulty CXL memory device returns a broken zero LSA size in its memory device information (Identify Memory Device (Opcode 4000h), CXL spec. 3.1, 8.2.9.9.1.1), a divide error occurs in the libnvdimm driver:
Oops: divide error: 0000 [#1] PREEMPT SMP NOPTI RIP: 0010:nd_label_data_init+0x10e/0x800 [libnvdimm]
Code and flow:
1) CXL Command 4000h returns LSA size = 0 2) config_size is assigned to zero LSA size (CXL pmem driver):
drivers/cxl/pmem.c: .config_size = mds->lsa_size,
3) max_xfer is set to zero (nvdimm driver):
drivers/nvdimm/label.c: max_xfer = min_t(size_t, ndd->nsarea.max_xfer, config_size);
4) A subsequent DIV_ROUND_UP() causes a division by zero:
drivers/nvdimm/label.c: / Make our initial read size a multiple of max_xfer size / drivers/nvdimm/label.c: read_size = min(DIV_ROUND_UP(read_size, max_xfer) * max_xfer, drivers/nvdimm/label.c- config_size);
Fix this by checking the config size parameter by extending an existing check.
{
"affected": [],
"aliases": [
"CVE-2025-38072"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-06-18T10:15:40Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibnvdimm/labels: Fix divide error in nd_label_data_init()\n\nIf a faulty CXL memory device returns a broken zero LSA size in its\nmemory device information (Identify Memory Device (Opcode 4000h), CXL\nspec. 3.1, 8.2.9.9.1.1), a divide error occurs in the libnvdimm\ndriver:\n\n Oops: divide error: 0000 [#1] PREEMPT SMP NOPTI\n RIP: 0010:nd_label_data_init+0x10e/0x800 [libnvdimm]\n\nCode and flow:\n\n1) CXL Command 4000h returns LSA size = 0\n2) config_size is assigned to zero LSA size (CXL pmem driver):\n\ndrivers/cxl/pmem.c: .config_size = mds-\u003elsa_size,\n\n3) max_xfer is set to zero (nvdimm driver):\n\ndrivers/nvdimm/label.c: max_xfer = min_t(size_t, ndd-\u003ensarea.max_xfer, config_size);\n\n4) A subsequent DIV_ROUND_UP() causes a division by zero:\n\ndrivers/nvdimm/label.c: /* Make our initial read size a multiple of max_xfer size */\ndrivers/nvdimm/label.c: read_size = min(DIV_ROUND_UP(read_size, max_xfer) * max_xfer,\ndrivers/nvdimm/label.c- config_size);\n\nFix this by checking the config size parameter by extending an\nexisting check.",
"id": "GHSA-6gcc-wg3c-rg44",
"modified": "2025-06-18T12:30:34Z",
"published": "2025-06-18T12:30:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38072"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1d1e1efad1cf049e888bf175a5c6be85d792620c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2bd4a938d2eda96ab7288b8fa5aae84a1de8c4ca"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/396c46d3f59a18ebcc500640e749f16e197d472b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/db1aef51b8e66a77f76b1250b914589c31a0a0ed"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e14347f647ca6d76fe1509b6703e340f2d5e2716"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ea3d95e05e97ea20fd6513f647393add16fce3b2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ef1d3455bbc1922f94a91ed58d3d7db440652959"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f49c337037df029440a8390380dd35d2cf5924d3"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
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