CVE-2020-27786

NameCVE-2020-27786
DescriptionA flaw was found in the Linux kernel’s implementation of MIDI, where an attacker with a local account and the permissions to issue ioctl commands to midi devices could trigger a use-after-free issue. A write to this specific memory while freed and before use causes the flow of execution to change and possibly allow for memory corruption or privilege escalation. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
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)
NVD severityhigh

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)stretch4.9.228-1fixed
stretch (security)4.9.272-2fixed
buster4.19.208-1fixed
buster (security)4.19.194-3fixed
bullseye5.10.70-1fixed
bullseye (security)5.10.46-5fixed
bookworm5.14.9-2fixed
sid5.14.12-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcestretch4.9.228-1
linuxsourcebuster4.19.131-1
linuxsource(unstable)5.6.14-1

Notes

https://git.kernel.org/linus/c1f6e3c818dd734c30f6a7eeebf232ba2cf3181d

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