155 lines
6.2 KiB
JSON
155 lines
6.2 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-42492",
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"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
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"state": "PUBLISHED",
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"assignerShortName": "XEN",
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"dateReserved": "2026-04-27T14:20:24.139Z",
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"datePublished": "2026-07-28T12:31:28.304Z",
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"dateUpdated": "2026-07-28T16:33:22.683Z"
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},
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"containers": {
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"cna": {
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"title": "vIRQ event channel binding may break Xenstore",
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"datePublic": "2026-07-28T12:00:00.000Z",
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"descriptions": [
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{
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"lang": "en",
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"value": "Xenstore, to have an up-to-date picture of the entire system, wants to\nknow of domains appearing and disappearing. To make this more robust, a\nnew XEN_DOMCTL_get_domain_state was introduced. The management of the\nbitmap underlying that operation is tied into the binding of the\nVIRQ_DOM_EXC virtual IRQ. Unfortunately an error path there would tear\ndown the bitmap even in cases when it wasn't set up. Unprivileged domains\ncan trigger that error path."
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}
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],
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"impacts": [
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{
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"descriptions": [
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{
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"lang": "en",
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"value": "An unprivileged domain can affect the operation of Xenstore, potentially\nleading to a Denial of Service (DoS) affecting the entire host. A\nhypervisor crash with similar host wide effect also is possible, albeit\nunlikely."
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}
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]
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}
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],
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"affected": [
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{
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"defaultStatus": "unknown",
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"product": "Xen",
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"vendor": "Xen",
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"versions": [
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{
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"status": "unknown",
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"version": "consult Xen advisory XSA-496"
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}
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]
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}
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],
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"configurations": [
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{
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"lang": "en",
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"value": "Xen 4.21 and onwards are vulnerable. Xen 4.20 and older are not\nvulnerable."
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}
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],
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"workarounds": [
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{
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"lang": "en",
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"value": "There is no known mitigation."
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}
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],
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"credits": [
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{
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"lang": "en",
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"type": "finder",
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"value": "This issue was discovered by Grygorii Strashko of EPAM."
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}
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],
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"references": [
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{
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"url": "https://xenbits.xenproject.org/xsa/advisory-496.html"
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}
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],
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"providerMetadata": {
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"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
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"shortName": "XEN",
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"dateUpdated": "2026-07-28T12:31:28.304Z"
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}
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},
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"adp": [
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "http://xenbits.xen.org/xsa/advisory-496.html"
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},
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{
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"url": "http://www.openwall.com/lists/oss-security/2026/07/28/13"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2026-07-28T16:33:22.683Z"
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}
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},
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{
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"problemTypes": [
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{
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"descriptions": [
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{
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"type": "CWE",
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"cweId": "CWE-459",
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"lang": "en",
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"description": "CWE-459 Incomplete Cleanup"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.5,
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"attackVector": "NETWORK",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "NONE",
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"confidentialityImpact": "NONE"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-07-28T15:56:49.876014Z",
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"id": "CVE-2026-42492",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-07-28T15:56:54.437Z"
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}
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}
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]
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}
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} |