CVE-2025-39742

MEDIUM EPSS 5.6%
Published Sep 11, 20259mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 11, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

Description

In 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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
5.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-369

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥4.8  –  <5.4.297
linuxlinux_kernel*≥5.5  –  <5.10.241
linuxlinux_kernel*≥5.11  –  <5.15.190
linuxlinux_kernel*≥5.16  –  <6.1.149
linuxlinux_kernel*≥6.2  –  <6.6.103
linuxlinux_kernel*≥6.7  –  <6.12.43
linuxlinux_kernel*≥6.13  –  <6.15.11
linuxlinux_kernel*≥6.16  –  <6.16.2
debiandebian_linux11.0any

References 12

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-032379.html
  • git.kernel.org https://git.kernel.org/stable/c/1a7cf828ed861de5be1aff99e10f114b363c19d3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/31d0599a23efdbfe579bfbd1eb8f8c942f13744d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4b4317b0d758ff92ba96f4e448a8992a6fe607bf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/59f7d2138591ef8f0e4e4ab5f1ab674e8181ad3a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/89fdac333a17ed990b41565630ef4791782e02f5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9b05e91afe948ed819bf87d7ba0fccf451ed79a6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9bba1a9994c523b44db64f63b564b4719ea2b7ef
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9d3211cb61a0773a2440d0a0698c1e6e7429f907
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac53f377393cc85156afdc90b636e84e544a6f96
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
    Mailing ListThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Mailing ListThird Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1a7cf828ed861de5be1aff99e10f114b363c19d3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/31d0599a23efdbfe579bfbd1eb8f8c942f13744d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4b4317b0d758ff92ba96f4e448a8992a6fe607bf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/59f7d2138591ef8f0e4e4ab5f1ab674e8181ad3a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/89fdac333a17ed990b41565630ef4791782e02f5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9b05e91afe948ed819bf87d7ba0fccf451ed79a6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9bba1a9994c523b44db64f63b564b4719ea2b7ef
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9d3211cb61a0773a2440d0a0698c1e6e7429f907
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac53f377393cc85156afdc90b636e84e544a6f96
    Patch