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CVE-2025-39742 In the Linux kernel, the following vulnerability has been resolved: RDMA: hfi1: fix possible divide-by-zero in…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux 6.17 | earliest → < 6.17 | 6.17 |
| Linux 6.16 | earliest → < 6.16.2 | 6.16.2 |
| Linux 6.15 | earliest → < 6.15.11 | 6.15.11 |
| Linux 6.12 | earliest → < 6.12.43 | 6.12.43 |
| Linux 6.6 | earliest → < 6.6.103 | 6.6.103 |
| Linux 6.1 | earliest → < 6.1.149 | 6.1.149 |
| Linux 5.15 | earliest → < 5.15.190 | 5.15.190 |
| Linux 5.10 | earliest → < 5.10.241 | 5.10.241 |
| Linux 5.4 | earliest → < 5.4.297 | 5.4.297 |
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| Product | Affected versions | Fixed in |
|---|---|---|
| Linux | 4.8 | No fix stated |
| SIMATIC CN 4100 5.0 | earliest → < 5.0 | 5.0 |
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