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CVE-2025-39823 KVM: x86: use array_index_nospec with indices that come from guest
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: use array_index_nospec with indices that come from guest min and dest_id are guest-controlled indices. Using array_index_nospec() after the bounds checks clamps these values to mitigate speculative execution side-channels.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux 6.17 | earliest → < 6.17 | 6.17 |
| Linux 6.16 | earliest → < 6.16.5 | 6.16.5 |
| Linux 6.12 | earliest → < 6.12.45 | 6.12.45 |
| Linux 6.6 | earliest → < 6.6.104 | 6.6.104 |
| Linux 6.1 | earliest → < 6.1.150 | 6.1.150 |
| Linux 5.15 | earliest → < 5.15.191 | 5.15.191 |
| Linux 5.10 | earliest → < 5.10.242 | 5.10.242 |
| Linux 5.4 | earliest → < 5.4.298 | 5.4.298 |
| Linux | 4.19 | No fix stated |
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| Product | Affected versions | Fixed in |
|---|---|---|
| SIMATIC CN 4100 5.0 | earliest → < 5.0 | 5.0 |
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