Vulnerability Details : CVE-2019-3837
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.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2019-3837
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.32:*:*:*:*:*:*:*
Threat overview for CVE-2019-3837
Top countries where our scanners detected CVE-2019-3837
Top open port discovered on systems with this issue
53
IPs affected by CVE-2019-3837 17,180
Threat actors abusing to this issue?
Yes
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affected by CVE-2019-3837!
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attack surface intelligence
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Exploit prediction scoring system (EPSS) score for CVE-2019-3837
0.09%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 24 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-3837
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST | |
|
6.1
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H |
1.8
|
4.2
|
Red Hat, Inc. | |
|
6.1
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H |
1.8
|
4.2
|
NIST |
CWE ids for CVE-2019-3837
-
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
-
The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-3837
-
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3837
1678423 – (CVE-2019-3837) CVE-2019-3837 kernel: memory leak in tcp_recvmsg() with NET_DMAIssue Tracking;Patch;Third Party Advisory
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