CVE-2020-25669

NameCVE-2020-25669
DescriptionA vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.
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-2483-1, DLA-2494-1
NVD severityhigh

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)stretch4.9.228-1vulnerable
stretch (security)4.9.272-1fixed
buster4.19.194-1fixed
buster (security)4.19.171-2fixed
bullseye5.10.40-1fixed
sid5.10.46-1fixed
linux-4.19 (PTS)stretch (security)4.19.194-1~deb9u1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcestretch4.9.246-1DLA-2494-1
linuxsourcebuster4.19.160-1
linuxsource(unstable)5.9.11-1
linux-4.19sourcestretch4.19.160-2~deb9u1DLA-2483-1

Notes

https://www.openwall.com/lists/oss-security/2020/11/05/2

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