CVE-2019-19065 Denial of service in n/a

What is CVE-2019-19065?

CVE-2019-19065 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 18 Nov 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A memory leak in the sdma_init() function in drivers/infiniband/hw/hfi1/sdma.c in the Linux kernel before 5.3.9 allows attackers to cause a denial of service (memory consumption) by triggering rhashtable_init() failures, aka CID-34b3be18a04e. NOTE: This has been disputed as not a vulnerability because "rhashtable_init() can only fail if it is passed invalid values in the second parameter's struct, but when invoked from sdma_init() that is a pointer to a static const struct, so an attacker could only trigger failure if they could corrupt kernel memory (in which case a small memory leak is not a significant problem).

Weakness: CWE-401

Which versions are affected by CVE-2019-19065?

It affects 3 products.

Products include Canonical Ubuntu Linux, Linux kernel, Opensuse Leap.

How do I fix CVE-2019-19065?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-19065 being exploited?

There is no known exploitation of CVE-2019-19065 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2019-19065, GHSA-hxgv-f94v-h963, UBUNTU-CVE-2019-19065.