ghsa-7f5q-x8vx-pfrp
Vulnerability from github
Published
2023-09-13 18:31
Modified
2024-04-04 07:39
Severity ?
Details
A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke the VMGEXIT
handler recursively. If an attacker manages to call the handler multiple times, they can trigger a stack overflow and cause a denial of service or potentially guest-to-host escape in kernel configurations without stack guard pages (CONFIG_VMAP_STACK
).
{ "affected": [], "aliases": [ "CVE-2023-4155" ], "database_specific": { "cwe_ids": [ "CWE-367" ], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2023-09-13T17:15:10Z", "severity": "MODERATE" }, "details": "A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke the `VMGEXIT` handler recursively. If an attacker manages to call the handler multiple times, they can trigger a stack overflow and cause a denial of service or potentially guest-to-host escape in kernel configurations without stack guard pages (`CONFIG_VMAP_STACK`).", "id": "GHSA-7f5q-x8vx-pfrp", "modified": "2024-04-04T07:39:29Z", "published": "2023-09-13T18:31:26Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4155" }, { "type": "WEB", "url": "https://access.redhat.com/security/cve/CVE-2023-4155" }, { "type": "WEB", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2213802" } ], "schema_version": "1.4.0", "severity": [ { "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H", "type": "CVSS_V3" } ] }
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Sightings
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.