CVE-2019-19767

Public Exploit

Description

The Linux kernel before 5.4.2 mishandles ext4_expand_extra_isize, as demonstrated by use-after-free errors in __ext4_expand_extra_isize and ext4_xattr_set_entry, related to fs/ext4/inode.c and fs/ext4/super.c, aka CID-4ea99936a163.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.48%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2 release notes vendor advisory
https://bugzilla.kernel.org/show_bug.cgi?id=205707 issue tracking vendor advisory
https://bugzilla.kernel.org/show_bug.cgi?id=205609 issue tracking exploit vendor advisory
https://github.com/torvalds/linux/commit/4ea99936a1630f51fc3a2d61a58ec4a1c4b7d55a third party advisory patch
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4ea99936a1630f51fc3a2d61a58ec4a1c4b7d55a patch vendor advisory
https://security.netapp.com/advisory/ntap-20200103-0001/
https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html mailing list
https://usn.ubuntu.com/4258-1/ vendor advisory
https://usn.ubuntu.com/4287-1/ vendor advisory
https://usn.ubuntu.com/4287-2/ vendor advisory
https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html mailing list
https://usn.ubuntu.com/4284-1/ vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-19767?
CVE-2019-19767 has been scored as a medium severity vulnerability.
How to fix CVE-2019-19767?
To fix CVE-2019-19767, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-19767 being actively exploited in the wild?
It is possible that CVE-2019-19767 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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