CVE-2019-16921 Information disclosure in n/a

What is CVE-2019-16921?

CVE-2019-16921 is a high-severity vulnerability in Linux kernel, published on 27 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In the Linux kernel before 4.17, hns_roce_alloc_ucontext in drivers/infiniband/hw/hns/hns_roce_main.c does not initialize the resp data structure, which might allow attackers to obtain sensitive information from kernel stack memory, aka CID-df7e40425813.

Weakness: CWE-665

Which versions are affected by CVE-2019-16921?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2019-16921?

No fix has been published for CVE-2019-16921 yet. Limit exposure of the affected software until one is available.

Is CVE-2019-16921 being exploited?

There is no known exploitation of CVE-2019-16921 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

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

Also known as GHSA-4f4g-m6h2-8q23, UBUNTU-CVE-2019-16921.