7.3

CVE-2026-62432

evtchn: Race between FIFO expand and reset

The EVTCHNOP_expand_array hypercall checks for whether FIFO event
channels are enabled, but without holding the correct lock.  It can race
with EVTCHNOP_reset, resulting in dereferencing a NULL pointer.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerXen
≫
Produkt Xen
Default Statusunknown
Version consult Xen advisory XSA-505
Status unknown
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.21% 0.117
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
CISA-ADP 7.3 3.9 3.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

https://xenbits.xenproject.org/xsa/advisory-505.html
http://xenbits.xen.org/xsa/advisory-505.html
http://www.openwall.com/lists/oss-security/2026/07/28/21