CVE-2019-11599

NameCVE-2019-11599
DescriptionThe coredump implementation in the Linux kernel before 5.0.10 does not use locking or other mechanisms to prevent vma layout or vma flags changes while it runs, which allows local users to obtain sensitive information, cause a denial of service, or possibly have unspecified other impact by triggering a race condition with mmget_not_zero or get_task_mm calls. This is related to fs/userfaultfd.c, mm/mmap.c, fs/proc/task_mmu.c, and drivers/infiniband/core/uverbs_main.c.
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-1799-1, DLA-1824-1, DSA-4465-1
NVD severitymedium (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)jessie3.16.56-1+deb8u1vulnerable
jessie (security)3.16.72-1fixed
stretch4.9.168-1vulnerable
stretch (security)4.9.168-1+deb9u5fixed
buster4.19.37-5fixed
buster (security)4.19.37-5+deb10u2fixed
bullseye4.19.37-6fixed
sid5.2.9-2fixed
linux-4.9 (PTS)jessie (security)4.9.168-1+deb9u5~deb8u1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)4.19.37-1medium
linuxsourcejessie3.16.68-1mediumDLA-1799-1
linuxsourcestretch4.9.168-1+deb9u3mediumDSA-4465-1
linux-4.9sourcejessie4.9.168-1+deb9u3~deb8u1mediumDLA-1824-1

Notes

https://marc.info/?l=linux-mm&m=155355419911404&w=2
https://bugs.chromium.org/p/project-zero/issues/detail?id=1790

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