RDMA: hfi1: fix possible divide-by-zero in find_hw_thread_mask()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-39742
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-09-11 17:15:36 UTC
Updated2026-05-12 13:17:08 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: RDMA: hfi1: fix possible divide-by-zero in find_hw_thread_mask() The function divides number of online CPUs by num_core_siblings, and later checks the divider by zero. This implies a possibility to get and divide-by-zero runtime error. Fix it by moving the check prior to division. This also helps to save one indentation level.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

Problem Types: CWE-369

CVSS v3.1 Breakdown

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

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 b094a36f90975373c3a241839869217a65f17d81 9bba1a9994c523b44db64f63b564b4719ea2b7ef git Not specified
CNA Linux Linux affected b094a36f90975373c3a241839869217a65f17d81 1a7cf828ed861de5be1aff99e10f114b363c19d3 git Not specified
CNA Linux Linux affected b094a36f90975373c3a241839869217a65f17d81 9d3211cb61a0773a2440d0a0698c1e6e7429f907 git Not specified
CNA Linux Linux affected b094a36f90975373c3a241839869217a65f17d81 4b4317b0d758ff92ba96f4e448a8992a6fe607bf git Not specified
CNA Linux Linux affected b094a36f90975373c3a241839869217a65f17d81 89fdac333a17ed990b41565630ef4791782e02f5 git Not specified
CNA Linux Linux affected b094a36f90975373c3a241839869217a65f17d81 9b05e91afe948ed819bf87d7ba0fccf451ed79a6 git Not specified
CNA Linux Linux affected b094a36f90975373c3a241839869217a65f17d81 31d0599a23efdbfe579bfbd1eb8f8c942f13744d git Not specified
CNA Linux Linux affected b094a36f90975373c3a241839869217a65f17d81 ac53f377393cc85156afdc90b636e84e544a6f96 git Not specified
CNA Linux Linux affected b094a36f90975373c3a241839869217a65f17d81 59f7d2138591ef8f0e4e4ab5f1ab674e8181ad3a git Not specified
CNA Linux Linux affected 4.8 Not specified
CNA Linux Linux unaffected 4.8 semver Not specified
CNA Linux Linux unaffected 5.4.297 5.4.* 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 6.12.43 6.12.* semver Not specified
CNA Linux Linux unaffected 6.15.11 6.15.* semver Not specified
CNA Linux Linux unaffected 6.16.2 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
git.kernel.org/stable/c/9d3211cb61a0773a2440d0a0698c1e6e7429f907 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
git.kernel.org/stable/c/1a7cf828ed861de5be1aff99e10f114b363c19d3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/89fdac333a17ed990b41565630ef4791782e02f5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/31d0599a23efdbfe579bfbd1eb8f8c942f13744d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9bba1a9994c523b44db64f63b564b4719ea2b7ef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ac53f377393cc85156afdc90b636e84e544a6f96 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/4b4317b0d758ff92ba96f4e448a8992a6fe607bf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9b05e91afe948ed819bf87d7ba0fccf451ed79a6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/59f7d2138591ef8f0e4e4ab5f1ab674e8181ad3a 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 Mailing List, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report