CVE Explorer
CVE-2026-62430
Accesses to the CMOS memory contents are done using an indirect IO port
pair. Therefore Xen needs to cache the guest chosen index, and one of
the usages of the index didn't take the necessary locking to avoid
concurrent changes. As a result, a guest could change the index after
it being checked, causing a subsequent out-of-bound read access to the
contents of an array.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unknown","product":"Xen","vendor":"Xen","versions":[{"status":"unknown","version":"consult Xen advisory XSA-503"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:914d5830f265c48d7d880d5f81cd12af06657c4788799467478315637a8c6960 · sha256:491a74c068c54984… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:914d5830f265c48d7d880d5f81cd12af06657c4788799467478315637a8c6960 · sha256:491a74c068c54984… · /containers/adp/1/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-362","description":"CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:914d5830f265c48d7d880d5f81cd12af06657c4788799467478315637a8c6960 · sha256:491a74c068c54984… · /containers/adp/1/problemTypes/0/descriptions/0
Source references
3 source assertions{"url":"http://www.openwall.com/lists/oss-security/2026/07/28/19"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:914d5830f265c48d7d880d5f81cd12af06657c4788799467478315637a8c6960 · sha256:491a74c068c54984… · /containers/adp/0/references/1
{"url":"http://xenbits.xen.org/xsa/advisory-503.html"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:914d5830f265c48d7d880d5f81cd12af06657c4788799467478315637a8c6960 · sha256:491a74c068c54984… · /containers/adp/0/references/0
{"url":"https://xenbits.xenproject.org/xsa/advisory-503.html"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:914d5830f265c48d7d880d5f81cd12af06657c4788799467478315637a8c6960 · sha256:491a74c068c54984… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.