CVE-2020-35506

Name	CVE-2020-35506
Description	A use-after-free vulnerability was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0 during the handling of the 'Information Transfer' command (CMD_TI). This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service or potential code execution with the privileges of the QEMU process.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	984454

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
qemu (PTS)	jessie, jessie (lts)	1:2.1+dfsg-12+deb8u23	fixed
	stretch (security)	1:2.8+dfsg-6+deb9u17	fixed
	stretch (lts), stretch	1:2.8+dfsg-6+deb9u19	fixed
	buster	1:3.1+dfsg-8+deb10u8	fixed
	buster (security)	1:3.1+dfsg-8+deb10u12	fixed
	bullseye	1:5.2+dfsg-11+deb11u3	vulnerable
	bullseye (security)	1:5.2+dfsg-11+deb11u2	vulnerable
	bookworm	1:7.2+dfsg-7+deb12u5	fixed
	trixie	1:8.2.1+ds-2	fixed
	sid	1:8.2.2+ds-2	fixed

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

Package	Type	Release	Fixed Version	Debian Bugs
qemu	source	experimental	1:6.0+dfsg-1~exp0
qemu	source	jessie	(not affected)
qemu	source	stretch	(not affected)
qemu	source	buster	(not affected)
qemu	source	(unstable)	1:6.0+dfsg-3	984454

Notes

[bullseye] - qemu <ignored> (Minor issue)
[buster] - qemu <not-affected> (Vulnerable code not present, FIFO support added later)
[stretch] - qemu <not-affected> (Vulnerable code not present, FIFO support added later)
https://bugzilla.redhat.com/show_bug.cgi?id=1909996
https://bugs.launchpad.net/qemu/+bug/1909247
[jessie] - qemu <not-affected> (Vulnerable code not present, FIFO support added later)