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 3.1
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:v3.24 | xen | 0 |
| Alpine:v3.20 | xen | 4.2.2-r2, 4.0.1-r0, 4.0.1-r1 |
| Alpine:v3.21 | xen | 4.7.1-r1, 4.0.1-r1, 4.3.1-r3 |
| Alpine:v3.16 | xen | 4.2.2-r8, 4.1.2-r11, 4.1.2-r12 |
| Alpine:v3.22 | xen | 4.6.0-r5, 4.2.2-r0, 4.16.2-r1 |
| Alpine:v3.15 | xen | 4.13.1-r2, 0, 4.0.1-r0 |
| Alpine:v3.18 | xen | 0, 4.9.1-r3, 4.13.0-r1 |
| Alpine:v3.17 | xen | 4.0.1-r0, 4.0.1-r1, 4.1.0-r0 |
| Alpine:v3.23 | xen | 4.3.0-r7, 4.13.1-r4, 0 |
| Alpine:v3.19 | xen | 0, 4.4.2-r0, 4.9.0-r4 |
Timeline
- Jan 5, 2024 CVE Published
- Aug 7, 2026 CVE Updated
- Aug 8, 2026 Distribution Patch