GHSA-4rmw-8gh7-w6g3

GHSA-4rmw-8gh7-w6g3 PUBLISHED CVSS 4.699999809265137 MEDIUM

Record from GitHub Advisory Database · Published January 5, 2024

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

Timeline

Jan 5, 2024 CVE Published
May 1, 2026 Security Advisory

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The same record, from the CLI:

vulnetix vdb vuln GHSA-4rmw-8gh7-w6g3
vulnetix vdb fixes GHSA-4rmw-8gh7-w6g3

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curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/GHSA-4rmw-8gh7-w6g3/fixes/registry"

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