libnvdimm/labels: Fix divide error in nd_label_data_init() (Linux Linux)

CVE-2025-38072
MEDIUM 5.5

At a glance

Source
NVD
EPSS
EPSS 0.22 % · percentile 12 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Analyzed

Description

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.

Weaknesses (CWE)

  • CWE-908 — Use of Uninitialized Resource

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected 7d47aad4570e5e6e9a8162bb417ca9b74132f27c < 2bd4a938d2eda96ab7288b8fa5aae84a1de8c4ca ; affected 7d47aad4570e5e6e9a8162bb417ca9b74132f27c < 396c46d3f59a18ebcc500640e749f16e197d472b ; affected 7d47aad4570e5e6e9a8162bb417ca9b74132f27c < f49c337037df029440a8390380dd35d2cf5924d3 ; affected 7d47aad4570e5e6e9a8162bb417ca9b74132f27c < db1aef51b8e66a77f76b1250b914589c31a0a0ed ; affected 7d47aad4570e5e6e9a8162bb417ca9b74132f27c < ea3d95e05e97ea20fd6513f647393add16fce3b2 ; affected 7d47aad4570e5e6e9a8162bb417ca9b74132f27c < 1d1e1efad1cf049e888bf175a5c6be85d792620c
Linux · Linuxaffected 4.20 ; unaffected 0 < 4.20 ; unaffected 5.4.294 ≤ 5.4.* ; unaffected 5.10.238 ≤ 5.10.* ; unaffected 5.15.185 ≤ 5.15.* ; unaffected 6.1.141 ≤ 6.1.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD