VDB
ALPINE-CVE-2023-46836
ALPINE-CVE-2023-46836
PUBLISHED
CVSS 4.699999809265137 MEDIUM
The fixes for XSA-422 (Branch Type Confusion) and XSA-434 (Speculative Return Stack Overflow) are not IRQ-safe. It was believed that the mitigations always operated in contexts with IRQs disabled. However, the original XSA-254 fix for Meltdown (XPTI) deliberately left interrupts enabled on two entry paths; one unconditionally, and one conditionally on whether XPTI was active. As BTC/SRSO and Meltdown affect different CPU vendors, the mitigations are not active together by default. Therefore, there is a race condition whereby a malicious PV guest can bypass BTC/SRSO protections and launch a BTC/SRSO attack against Xen.
Risk Scores
CVSS v3.1
4.699999809265137
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.20 | xen | 4.9.1-r3, 4.3.0-r4, 4.0.1-r0 |
| Alpine:v3.21 | xen | 4.9.1-r3, 4.9.1-r2, 4.9.1-r1 |
| Alpine:v3.16 | xen | 4.14.1-r3, 4.2.2-r0, 4.2.2-r10 |
| Alpine:v3.22 | xen | 4.2.2-r3, 4.2.2-r2, 4.2.2-r11 |
| Alpine:v3.15 | xen | 4.15.0-r0, 0, 4.0.1-r0 |
| Alpine:v3.18 | xen | 0, 4.2.1-r11, 4.2.1-r10 |
| Alpine:v3.17 | xen | 4.1.2-r11, 4.10.0-r0, 4.1.2-r9 |
| Alpine:v3.23 | xen | 4.9.1-r3, 4.13.1-r4, 0 |
| Alpine:v3.19 | xen | 0, 4.9.1-r3, 4.9.1-r2 |
Timeline
- Jan 5, 2024 CVE Published
- Dec 3, 2025 CVE Updated
- Apr 30, 2026 Distribution Patch