CVE-2019-3837
kernel: memory leak in tcp_recvmsg() with NET_DMA
Severity
ModerateRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · April 3, 2019
Updated · June 28, 2026
Description
It was found that the net_dma code in tcp_recvmsg() in the RHEL6 kernel 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.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 6.1CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
CWE-663 · Use of a Non-reentrant Function in a Concurrent Context