CVE-2020-10768

NameCVE-2020-10768
DescriptionA flaw was found in the Linux Kernel before 5.8-rc1 in the prctl() function, where it can be used to enable indirect branch speculation after it has been disabled. This call incorrectly reports it as being 'force disabled' when it is not and opens the system to Spectre v2 attacks. The highest threat from this vulnerability is to confidentiality.
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)
ReferencesDLA-2323-1
NVD severitylow

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)stretch4.9.228-1fixed
stretch (security)4.9.240-2fixed
buster4.19.146-1fixed
buster (security)4.19.152-1fixed
bullseye, sid5.9.1-1fixed
linux-4.19 (PTS)stretch (security)4.19.152-1~deb9u1fixed

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)5.7.6-1
linux-4.19sourcestretch4.19.132-1~deb9u2DLA-2323-1

Notes

https://www.openwall.com/lists/oss-security/2020/06/10/1
https://git.kernel.org/linus/4d8df8cbb9156b0a0ab3f802b80cb5db57acc0bf

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