[DSA 5983-1] qemu security update

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Debian Security Advisory DSA-5983-1                   [email protected]
https://www.debian.org/security/                       Moritz Muehlenhoff
August 22, 2025                       https://www.debian.org/security/faq
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Package        : qemu
CVE ID         : CVE-2025-54566 CVE-2025-54567

This update removes the usage of the C (Credential) flag for the
binfmt_misc registration within the qemu-user package, as it allowed for
privilege escalation when running a suid/sgid binary under qemu-user.
This means suid/sgid foreign-architecture binaries are not running with
elevated privileges under qemu-user anymore.  If you relied on this
behavior of qemu-user in the past (running suid/sgid foreign-arch
binaries), this will require changes to your deployment.

In Bookworm the affected packages are qemu-user-static (and
qemu-user-binfmt) instead of qemu-user.

Additionally, two security issues were fixed the in SR-IOV support
of QEMU system emulation.

For the oldstable distribution (bookworm), these problems have been fixed
in version 1:7.2+dfsg-7+deb12u15.

For the stable distribution (trixie), these problems have been fixed in
version 1:10.0.2+ds-2+deb13u1.

We recommend that you upgrade your qemu packages.

For the detailed security status of qemu please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/qemu

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: [email protected]
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