CVE-2019-3837 Race condition in kernel

What is CVE-2019-3837?

CVE-2019-3837 is a medium-severity vulnerability in Linux kernel, published on 11 Apr 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

It was found that the net_dma code in tcp_recvmsg() in the 2.6.32 kernel as shipped in RHEL6 is thread-unsafe. So an unprivileged multi-threaded userspace application calling recvmsg() for the same network socket in parallel executed on ioatdma-enabled hardware with net_dma enabled can leak the memory, crash the host leading to a denial-of-service or cause a random memory corruption.

Weakness: CWE-401, CWE-362

Which versions are affected by CVE-2019-3837?

It affects 2 products.

Products include Linux kernel, Redhat Enterprise Linux.

How do I fix CVE-2019-3837?

Apply the vendor's patch.

Is CVE-2019-3837 being exploited?

There is no known exploitation of CVE-2019-3837 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 DEBIAN-CVE-2019-3837, GHSA-hx7v-466q-33qj, UBUNTU-CVE-2019-3837.