DEBIAN-CVE-2026-0665: qemu security update

DEBIAN-CVE-2026-0665, released February 18, 2026, fixes 1 CVE in qemu. None of them is reported as exploited. Patch Radar priority: Routine.

Routine

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

6.5

Base score, 0 to 10

Highest EPSS

0.0017

6th percentile

Fixed package versions

Product	Release	Fixed in
qemu	Debian 13.5 (trixie)	1:10.0.8+ds-0+deb13u1
qemu	Debian 14	1:10.2.0+ds-2

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Routine	CVE-2026-0665	qemu: An off-by-one error was found in QEMU's KVM Xen guest support	6.5	0.0017	None reported

Also fixes CVE-2026-0665

ELSA-2026-50241
qemu-guest-agent, qemu-img, qemu-kvm and 8 more on ol 9
qemu-block-extra 1:10.1.0+ds-5ubuntu2.4
qemu-block-extra on Ubuntu 25.10 (questing)
qemu-block-supplemental 1:10.1.0+ds-5ubuntu2.4
qemu-block-supplemental on Ubuntu 25.10 (questing)
qemu-guest-agent 1:10.1.0+ds-5ubuntu2.4
qemu-guest-agent on Ubuntu 25.10 (questing)
qemu-system 1:10.1.0+ds-5ubuntu2.4
qemu-system on Ubuntu 25.10 (questing)
qemu-system-arm 1:10.1.0+ds-5ubuntu2.4
qemu-system-arm on Ubuntu 25.10 (questing)
qemu-system-common 1:10.1.0+ds-5ubuntu2.4
qemu-system-common on Ubuntu 25.10 (questing)
qemu-system-data 1:10.1.0+ds-5ubuntu2.4
qemu-system-data on Ubuntu 25.10 (questing)

Vendor advisory

https://security-tracker.debian.org/tracker/CVE-2026-0665

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