CVE-2021-3947

NameCVE-2021-3947
DescriptionA stack-buffer-overflow was found in QEMU in the NVME component. The flaw lies in nvme_changed_nslist() where a malicious guest controlling certain input can read out of bounds memory. A malicious user could use this flaw leading to disclosure of sensitive information.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qemu (PTS)stretch1:2.8+dfsg-6+deb9u9fixed
stretch (security)1:2.8+dfsg-6+deb9u17fixed
buster, buster (security)1:3.1+dfsg-8+deb10u8fixed
bullseye1:5.2+dfsg-11+deb11u1fixed
bullseye (security)1:5.2+dfsg-11+deb11u2fixed
bookworm, sid1:7.0+dfsg-7fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qemusourcestretch(not affected)
qemusourcebuster(not affected)
qemusourcebullseye(not affected)
qemusource(unstable)1:6.2+dfsg-1

Notes

[bullseye] - qemu <not-affected> (Vulnerable code introduced later)
[buster] - qemu <not-affected> (Vulnerable code introduced later)
[stretch] - qemu <not-affected> (Vulnerable code introduced later)
https://bugzilla.redhat.com/show_bug.cgi?id=2021869
Introduced by: https://gitlab.com/qemu-project/qemu/-/commit/f432fdfa1215bc3a00468b2e711176be279b0fd2 (v6.0.0-rc0)
https://lore.kernel.org/qemu-devel/20211111153125.2258176-1-philmd@redhat.com/
Fixed by: https://gitlab.com/qemu-project/qemu/-/commit/e2c57529c9306e4c9aac75d9879f6e7699584a22 (v6.2.0-rc3)

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