7.8

CVE-2026-3842

Qemu-kvm: hyperv/syndbg: missing mapped-length guard after cpu_physical_memory_map causes host oob write

A flaw was found in QEMU. This vulnerability allows a local attacker within a guest virtual machine to write data beyond its allocated memory. This occurs when cpu_physical_memory_map() returns a shorter length than expected, leading to an out-of-bounds write. Successful exploitation could result in unauthorized access to guest memory or corruption of heap-allocated objects, potentially causing information disclosure, data integrity issues, or a denial of service.
Daten sind bereitgestellt durch das CVE Programm von Authorized Data Publishers (ADP) (Unstrukturiert)
HerstellerRed Hat
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Produkt Red Hat Enterprise Linux 10
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat Enterprise Linux 6
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat Enterprise Linux 7
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat Enterprise Linux 7
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat Enterprise Linux 8
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat Enterprise Linux 9
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat OpenShift Container Platform 4
Default Statusunaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.023
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
patrick@puiterwijk.org 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

https://access.redhat.com/security/cve/CVE-2026-3842
https://bugzilla.redhat.com/show_bug.cgi?id=2458150
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3842.json