s390/pkey: Prevent overflow in size calculation for memdup_user() (Linux Linux)

CVE-2025-38257
HIGH 7.3

At a glance

Source
NVD
EPSS
EPSS 0.18 % · percentile 8 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Prevent overflow in size calculation for memdup_user() Number of apqn target list entries contained in 'nr_apqns' variable is determined by userspace via an ioctl call so the result of the product in calculation of size passed to memdup_user() may overflow. In this case the actual size of the allocated area and the value describing it won't be in sync leading to various types of unpredictable behaviour later. Use a proper memdup_array_user() helper which returns an error if an overflow is detected. Note that it is different from when nr_apqns is initially zero - that case is considered valid and should be handled in subsequent pkey_handler implementations. Found by Linux Verification Center (linuxtesting.org).

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:HLinux
CVSS 3.1HIGH 7.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d < ad1bdd24a02d5a8d119af8e4cd50933780a6d29f ; affected f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d < faa1ab4a23c42e34dc000ef4977b751d94d5148c ; affected f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d < 88f3869649edbc4a13f6c2877091f81cd5a50f05 ; affected f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d < f855b119e62b004a5044ed565f2a2b368c4d3f16 ; affected f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d < 73483ca7e07a5e39bdf612eec9d3d293e8bef649 ; affected f2bbc96e7cfad3891b7bf9bd3e566b9b7ab4553d < 7360ee47599af91a1d5f4e74d635d9408a54e489
Linux · Linuxaffected 5.4 ; unaffected 0 < 5.4 ; unaffected 5.15.187 ≤ 5.15.* ; unaffected 6.1.143 ≤ 6.1.* ; unaffected 6.6.96 ≤ 6.6.* ; unaffected 6.12.36 ≤ 6.12.*

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