DescriptionAn assertion-failure flaw was found in Qemu before 2.10.1, in the Network Block Device (NBD) server's initial connection negotiation, where the I/O coroutine was undefined. This could crash the qemu-nbd server if a client sent unexpected data during connection negotiation. A remote user or process could use this flaw to crash the qemu-nbd server resulting in denial of service.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qemu (PTS)bullseye1:5.2+dfsg-11+deb11u3fixed
bullseye (security)1:5.2+dfsg-11+deb11u2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qemusource(unstable)(not affected)
qemu-kvmsource(unstable)(not affected)


- qemu <not-affected> (Vulnerable code introduced in v2.9.0-rc0)
- qemu-kvm <not-affected> (Vulnerable code introduced in v2.9.0-rc0)
Fixed by:;a=commitdiff;h=2b0bbc4f8809c972bad134bc1a2570dbb01dea0b
Introduced by:;a=commitdiff;h=ff82911cd3f69f028f2537825c9720ff78bc3f19

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