CVE-2026-48914

Name	CVE-2026-48914
Description	A flaw was found in QEMU's virtio-blk device. The issue arises because the device does not properly validate the size of input descriptors before writing data. A malicious guest with high privileges could exploit this vulnerability by submitting a malformed virtio-blk SCSI request, leading to an out-of-bounds write in the host heap memory and a potential denial of service (DoS) for the QEMU process.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1139923

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
qemu (PTS)	bookworm	1:7.2+dfsg-7+deb12u18	vulnerable
	bookworm (security)	1:7.2+dfsg-7+deb12u15	vulnerable
	trixie	1:10.0.11+ds-0+deb13u1	fixed
	trixie (security)	1:10.0.2+ds-2+deb13u1	vulnerable
	forky	1:11.1.0+ds-2	fixed
	sid	1:11.1.1+ds-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
qemu	source	trixie	1:10.0.11+ds-0+deb13u1
qemu	source	(unstable)	1:11.0.2+ds-1			1139923

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=2488283
Introduced with: https://gitlab.com/qemu-project/qemu/-/commit/f34e73cd69bdbdb9b1d56b288c5e14d6fff58165 (v1.1.0-rc3)
Fixed by: https://gitlab.com/qemu-project/qemu/-/commit/f5e2c6906cad9a84140e232f2e3eb7a46bf07f62 (v11.0.2)