{"metadata": {"vulnerability": "cve-2025-21818", "count": 81, "kinds": {"milestone": 6, "sighting": 3, "kev": 0, "other": 72}}, "data": [{"timestamp": "2024-12-29T08:45:45.774Z", "date_only": false, "value": "2024-12-29T08:45:45.774Z", "kind": "milestone", "label": "Reserved", "source": "cvelistv5", "record": "cve-2025-21818", "field": "cveMetadata.dateReserved"}, {"timestamp": "2025-02-27T20:04:16.619Z", "date_only": false, "value": "2025-02-27T20:04:16.619Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "cve-2025-21818", "field": "cveMetadata.datePublished"}, {"timestamp": "2025-02-27T20:16:00Z", "date_only": false, "value": "2025-02-27T20:16:00Z", "kind": "milestone", "label": "Published", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2025-21818", "record": "UBUNTU-CVE-2025-21818", "field": "published"}, {"timestamp": "2025-02-27T20:16:04Z", "date_only": false, "value": "2025-02-27T20:16:04Z", "kind": "other", "label": "Nvd published at", "source": "github \u00b7 GHSA-F7Q5-FWF8-R5Q4", "record": "GHSA-F7Q5-FWF8-R5Q4", "field": "database_specific.nvd_published_at"}, {"timestamp": "2025-02-27T20:16:04.330Z", "date_only": false, "value": "2025-02-27T20:16:04.330", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2025-21818", "record": "FKIE_CVE-2025-21818", "field": "published"}, {"timestamp": "2025-02-27T20:25:55Z", "date_only": false, "value": "2025-02-27T20:25:55.000000Z", "kind": "sighting", "label": "Published proof of concept", "source": "https://t.me/DarkWebInformer_CVEAlerts/5790", "record": "CVE-2025-21818", "field": "creation_timestamp", "uuid": "a8e6fbe8-4861-4ce6-af48-d7821c627170", "content": "\ud83d\udd17 DarkWebInformer.com - Cyber Threat Intelligence\n\ud83d\udccc CVE ID: CVE-2025-21818\n\ud83d\udd25 CVSS Score: N/A\n\ud83d\udd39 Description: In the Linux kernel, the following vulnerability has been resolved:\n\nx86/xen: fix xen_hypercall_hvm() to not clobber %rbx\n\nxen_hypercall_hvm(), which is used when running as a Xen PVH guest at\nmost only once during early boot, is clobbering %rbx. Depending on\nwhether the caller relies on %rbx to be preserved across the call or\nnot, this clobbering might result in an early crash of the system.\n\nThis can be avoided by using an already saved register instead of %rbx.\n\ud83d\udccf Published: 2025-02-27T20:04:16.619Z\n\ud83d\udccf Modified: 2025-02-27T20:04:16.619Z\n\ud83d\udd17 References:\n1. https://git.kernel.org/stable/c/522d726824cc570e0b6bf0b3af4d5a826f1b17c5\n2. https://git.kernel.org/stable/c/242f7584da3ad041a9db809d33d27a8be8eccc29\n3. https://git.kernel.org/stable/c/4890a0858c09d96f3234a8f94663de80a7201bc4\n4. https://git.kernel.org/stable/c/23f6f420cd727d641f95478fcf3bbbee41e4e5d6\n5. https://git.kernel.org/stable/c/98a5cfd2320966f40fe049a9855f8787f0126825", "url": "https://t.me/DarkWebInformer_CVEAlerts/5790"}, {"timestamp": "2025-02-27T21:32:17Z", "date_only": false, "value": "2025-02-27T21:32:17Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-F7Q5-FWF8-R5Q4", "record": "GHSA-F7Q5-FWF8-R5Q4", "field": "published"}, {"timestamp": "2025-02-27T21:32:17Z", "date_only": false, "value": "2025-02-27T21:32:17Z", "kind": "other", "label": "Updated", "source": "github \u00b7 GHSA-F7Q5-FWF8-R5Q4", "record": "GHSA-F7Q5-FWF8-R5Q4", "field": "modified"}, {"timestamp": "2025-02-27T21:58:56.933Z", "date_only": false, "value": "2025-02-27T21:58:56.933975Z", "kind": "sighting", "label": "Seen", "source": "https://bsky.app/profile/cve.skyfleet.blue/post/3lj6v7ybekg2t", "record": "CVE-2025-21818", "field": "creation_timestamp", "uuid": "d4a73cb1-cac2-4f35-a3eb-edf4cf6f9b55", "url": "https://bsky.app/profile/cve.skyfleet.blue/post/3lj6v7ybekg2t"}, {"timestamp": "2025-02-27T23:00:00Z", "date_only": false, "value": "2025-02-27T23:00:00.000+00:00", "kind": "other", "label": "Advisory revision", "source": "csaf_certbund \u00b7 WID-SEC-W-2025-0461", "record": "WID-SEC-W-2025-0461", "field": "document.tracking.revision_history.0.date"}, {"timestamp": "2025-02-27T23:00:00Z", "date_only": false, "value": "2025-02-27T23:00:00.000+00:00", "kind": "milestone", "label": "Published", "source": "csaf_certbund \u00b7 WID-SEC-W-2025-0461", "record": "WID-SEC-W-2025-0461", "field": "document.tracking.initial_release_date"}, {"timestamp": "2025-02-27T23:00:00Z", "date_only": false, "value": "2025-02-27T23:00:00.000+00:00", "kind": "other", "label": "Release date", "source": "csaf_certbund \u00b7 WID-SEC-W-2025-0461", "record": "WID-SEC-W-2025-0461", "field": "vulnerabilities.0.release_date"}, {"timestamp": "2025-02-27T23:26:55Z", "date_only": false, "value": "2025-02-27T23:26:55.000000Z", "kind": "sighting", "label": "Seen", "source": "https://t.me/cvedetector/19081", "record": "CVE-2025-21818", "field": "creation_timestamp", "uuid": "b3c76594-5630-423e-a8a1-cf436a2d8d28", "content": "{\n  \"Source\": \"CVE FEED\",\n  \"Title\": \"CVE-2025-21818 - Xen Linux XenPVH Guest Register Clobber Vulnerability\", \n  \"Content\": \"CVE ID : CVE-2025-21818 \nPublished : Feb. 27, 2025, 8:16 p.m. | 1\u00a0hour, 21\u00a0minutes ago \nDescription : In the Linux kernel, the following vulnerability has been resolved:  \n  \nx86/xen: fix xen_hypercall_hvm() to not clobber %rbx  \n  \nxen_hypercall_hvm(), which is used when running as a Xen PVH guest at  \nmost only once during early boot, is clobbering %rbx. Depending on  \nwhether the caller relies on %rbx to be preserved across the call or  \nnot, this clobbering might result in an early crash of the system.  \n  \nThis can be avoided by using an already saved register instead of %rbx. \nSeverity: 0.0 | NA \nVisit the link for more details, such as CVSS details, affected products, timeline, and more...\",\n  \"Detection Date\": \"27 Feb 2025\",\n  \"Type\": \"Vulnerability\"\n}\n\ud83d\udd39 t.me/cvedetector \ud83d\udd39", "url": "https://t.me/cvedetector/19081"}, {"timestamp": "2025-03-02T14:26:37.856Z", "date_only": false, "value": "2025-03-02T14:26:37.856Z", "kind": "other", "label": "Rejected", "source": "cvelistv5", "record": "cve-2025-21818", "field": "cveMetadata.dateRejected"}, {"timestamp": "2025-03-02T14:26:37.856Z", "date_only": false, "value": "2025-03-02T14:26:37.856Z", "kind": "other", "label": "Updated", "source": "cvelistv5", "record": "cve-2025-21818", "field": "cveMetadata.dateUpdated"}, {"timestamp": 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