CVE-2025-39823
Last modified
CVE-2025-39823 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | >= 4.19, < 5.4.298 | — |
| Linux | Linux Kernel | >= 5.5, < 5.10.242 | — |
| Linux | Linux Kernel | >= 5.11, < 5.15.191 | — |
| Linux | Linux Kernel | >= 5.16, < 6.1.150 | — |
| Linux | Linux Kernel | >= 6.2, < 6.6.104 | — |
| Linux | Linux Kernel | >= 6.7, < 6.12.45 | — |
| Linux | Linux Kernel | >= 6.13, < 6.16.5 | — |
| Linux | Linux Kernel | 6.17 | Rc1 |
| Debian | Debian Linux | 11.0 | — |
References
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlMailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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