[DLA 4296-1] qemu security update
[SECURITY] [DLA 4296-1] qemu security update
-------------------------------------------------------------------------
Debian LTS Advisory DLA-4296-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Santiago Ruano Rincón
September 08, 2025 https://wiki.debian.org/LTS
-------------------------------------------------------------------------
Package : qemu
Version : 1:5.2+dfsg-11+deb11u5
CVE ID : CVE-2024-7409
Debian Bug : 1111844
Two security issues were discovered in QEMU, a fast processor
emulator, that could result in denial of service and privilege escalation.
CVE-2024-7409
Denial of service (DoS) in the NBD server via improper
synchronization during socket closure
This update removes the usage of the C (Credential) flag for the
binfmt_misc registration within the qemu-user-static (and
qemu-user-binfmt) packages, 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 Bullseye the affected packages are qemu-user-static (and
qemu-user-binfmt).
For Debian 11 bullseye, these problems have been fixed in version
1:5.2+dfsg-11+deb11u5.
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 LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
