CVE-2019-3837 — MEDIUM (6.1)

Vulnerability 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.

CVSS Score

6.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

HIGH

Affected Products

Vendor	Product	Versions
Linux	Linux Kernel	2.6.32
Redhat	Enterprise Linux	6.0

Related Weaknesses (CWE)

CWE-362 CWE-401

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3837Issue TrackingPatchThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3837Issue TrackingPatchThird Party Advisory

FAQ

What is CVE-2019-3837?

CVE-2019-3837 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 ne...

How severe is CVE-2019-3837?

CVE-2019-3837 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2019-3837?

Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Redhat Enterprise Linux.