scsi: ufs: exynos: Fix programming of HCI_UTRL_NEXUS_TYPE

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Summary

CVECVE-2025-39788
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-09-11 17:15:45 UTC
Updated2026-05-12 13:17:11 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: scsi: ufs: exynos: Fix programming of HCI_UTRL_NEXUS_TYPE On Google gs101, the number of UTP transfer request slots (nutrs) is 32, and in this case the driver ends up programming the UTRL_NEXUS_TYPE incorrectly as 0. This is because the left hand side of the shift is 1, which is of type int, i.e. 31 bits wide. Shifting by more than that width results in undefined behaviour. Fix this by switching to the BIT() macro, which applies correct type casting as required. This ensures the correct value is written to UTRL_NEXUS_TYPE (0xffffffff on gs101), and it also fixes a UBSAN shift warning: UBSAN: shift-out-of-bounds in drivers/ufs/host/ufs-exynos.c:1113:21 shift exponent 32 is too large for 32-bit type 'int' For consistency, apply the same change to the nutmrs / UTMRL_NEXUS_TYPE write.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-787

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 55f4b1f73631a0817717fe6e98517de51b4c3527 01510a9e8222f11cce064410f3c2fcf0756c0a08 git Not specified
CNA Linux Linux affected 55f4b1f73631a0817717fe6e98517de51b4c3527 098b2c8ee208c77126839047b9e6e1925bb35baa git Not specified
CNA Linux Linux affected 55f4b1f73631a0817717fe6e98517de51b4c3527 c1f025da8f370a015e412b55cbcc583f91de8316 git Not specified
CNA Linux Linux affected 55f4b1f73631a0817717fe6e98517de51b4c3527 6d53b2a134da77eb7fe65c5c7c7a3c193539a78a git Not specified
CNA Linux Linux affected 55f4b1f73631a0817717fe6e98517de51b4c3527 dc8fb963742f1a38d284946638f9358bdaa0ddee git Not specified
CNA Linux Linux affected 55f4b1f73631a0817717fe6e98517de51b4c3527 5b9f1ef293428ea9c0871d96fcec2a87c4445832 git Not specified
CNA Linux Linux affected 55f4b1f73631a0817717fe6e98517de51b4c3527 01aad16c2257ab8ff33b152b972c9f2e1af47912 git Not specified
CNA Linux Linux affected 5.9 Not specified
CNA Linux Linux unaffected 5.9 semver Not specified
CNA Linux Linux unaffected 5.10.241 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.190 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.149 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.103 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.44 6.12.* semver Not specified
CNA Linux Linux unaffected 6.16.4 6.16.* semver Not specified
CNA Linux Linux unaffected 6.17 * original_commit_for_fix Not specified
ADP Siemens SIMATIC CN 4100 affected V5.0 custom Not specified

References

ReferenceSourceLinkTags
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Third Party Advisory
git.kernel.org/stable/c/6d53b2a134da77eb7fe65c5c7c7a3c193539a78a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-032379.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/dc8fb963742f1a38d284946638f9358bdaa0ddee 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/01510a9e8222f11cce064410f3c2fcf0756c0a08 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5b9f1ef293428ea9c0871d96fcec2a87c4445832 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c1f025da8f370a015e412b55cbcc583f91de8316 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/01aad16c2257ab8ff33b152b972c9f2e1af47912 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00007.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Third Party Advisory
git.kernel.org/stable/c/098b2c8ee208c77126839047b9e6e1925bb35baa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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