CVE-2019-11091

NameCVE-2019-11091
DescriptionMicroarchitectural Data Sampling Uncacheable Memory (MDSUM): Uncacheable memory on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. A list of impacted products can be found here: https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-update-guidance_05132019.pdf
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-1787-1, DLA-1789-1, DLA-1789-2, DLA-1799-1, DSA-4444-1, DSA-4447-1
Debian Bugs929129

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
intel-microcode (PTS)bullseye/non-free3.20240813.1~deb11u1fixed
bullseye/non-free (security)3.20231114.1~deb11u1fixed
bookworm/non-free-firmware3.20240910.1~deb12u1fixed
bookworm/non-free-firmware (security)3.20231114.1~deb12u1fixed
sid/non-free-firmware, trixie/non-free-firmware3.20240910.1fixed
linux (PTS)bullseye5.10.223-1fixed
bullseye (security)5.10.226-1fixed
bookworm6.1.115-1fixed
bookworm (security)6.1.112-1fixed
trixie6.11.5-1fixed
sid6.11.7-1fixed
xen (PTS)bullseye4.14.6-1fixed
bullseye (security)4.14.5+94-ge49571868d-1fixed
bookworm4.17.3+10-g091466ba55-1~deb12u1fixed
sid, trixie4.17.3+36-g54dacb5c02-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
intel-microcodesourcejessie3.20190618.1~deb8u1DLA-1789-2
intel-microcodesourcestretch3.20190514.1~deb9u1DSA-4447-1
intel-microcodesource(unstable)3.20190514.1
linuxsourcejessie3.16.68-1DLA-1799-1
linuxsourcestretch4.9.168-1+deb9u2DSA-4444-1
linuxsource(unstable)4.19.37-2
linux-4.9sourcejessie4.9.168-1+deb9u2~deb8u1DLA-1787-1
xensourcestretch4.8.5.final+shim4.10.4-1+deb9u12
xensource(unstable)4.11.1+92-g6c33308a8d-1929129

Notes

[jessie] - xen <ignored> (Depends on fix for CVE-2017-5715, CVE-2017-5753, CVE-2017-5754)
https://git.kernel.org/linus/fa4bff165070dc40a3de35b78e4f8da8e8d85ec5
https://software.intel.com/security-software-guidance/software-guidance/microarchitectural-data-sampling
https://xenbits.xen.org/xsa/advisory-297.html
libvirt support for md-clear CPUID bit:
https://libvirt.org/git/?p=libvirt.git;a=commit;h=538d873571d7a682852dc1d70e5f4478f4d64e85
qemu and libvirt need updates to passthrough md-clear, see #929067 for qemu and #929154 for libvirt

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