VDB
CVE-2025-39815
CVE-2025-39815
PUBLISHED
CVSS 7.8 HIGH
RISC-V: KVM: fix stack overrun when loading vlenb
Reported by linux · Published September 16, 2025
In the Linux kernel, the following vulnerability has been resolved: RISC-V: KVM: fix stack overrun when loading vlenb The userspace load can put up to 2048 bits into an xlen bit stack buffer. We want only xlen bits, so check the size beforehand.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| linux_kernel | linux | 6.16.5, 6.12.45 |
| Linux | Linux | c76bf8359188a11f8fd790e5bbd6077894a245cc, 799766208f09f95677a9ab111b93872d414fbad7, 6d28659b692a0212f360f8bd8a58712b339f9aac |
Risk scores
CVSS 3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 2fa290372dfe7dd248b1c16f943f273a3e674f22, 2fa290372dfe7dd248b1c16f943f273a3e674f22, 2fa290372dfe7dd248b1c16f943f273a3e674f22 |
| Linux | Linux | 6.8, 0, 6.12.45 |
| Linux | Linux | 2fa290372dfe7dd248b1c16f943f273a3e674f22, 6.16.5, 6.17 |
| linux | linux_kernel | 6.8, 6.8, 6.8 |
Timeline
- Sep 16, 2025 CVE Published
- Sep 17, 2025 EPSS Score (30 in total, the first dated here)
- Oct 4, 2025 Coalition ESS Score (8 in total, the first dated here)
- Dec 15, 2025 Security Advisory (116 in total, the first dated here)
- Dec 16, 2025 PoC Published
- Mar 29, 2026 Distribution Patch (105 in total, the first dated here)
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2025-39815
vulnetix vdb fixes CVE-2025-39815Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2025-39815/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart