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CVE-2026-62432

HIGH
7.3
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-62432
State
PUBLISHED
Assigner
XEN
Reserved
2026-07-14 10:28 UTC
Published
2026-07-28 12:32 UTC
Last updated
2026-07-28 16:33 UTC
Primary CWE
CWE-362
CWE-362 Concurrent Execution using Shared Resource with Impr…
Vendor / Product
Xen / Xen
Sources
cve.org  ·  NVD

Severity & Metrics

7.3 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
Xen Xen — consult Xen advisory XSA-505
Weakness (CWE)
CWESourceDescription
CWE-362 adp CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSS scores (1)
ScoreSeverityVersionSourceVector
7.3 HIGH 3.1 adp CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
References (1)
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