CVE-2019-1965

Cisco NX-OS Software Remote Management Memory Leak Denial of Service Vulnerability

HIGH

7.7

CVSS Score

Published: August 28, 2019 at 06:55 PM UTC

Updated: June 17, 2026 at 02:29 AM UTC

87 products affected across 1 vendorNx OSNexus 3048Nexus 3636C-R

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Severity

HIGH7.7

Exploit prediction

EPSS 2%

SSVC

No known exploit

Description

A vulnerability in the Virtual Shell (VSH) session management for Cisco NX-OS Software could allow an authenticated, remote attacker to cause a VSH process to fail to delete upon termination. This can lead to a build-up of VSH processes that overtime can deplete system memory. When there is no system memory available, this can cause unexpected system behaviors and crashes. The vulnerability is due to the VSH process not being properly deleted when a remote management connection to the device is disconnected. An attacker could exploit this vulnerability by repeatedly performing a remote management connection to the device and terminating the connection in an unexpected manner. A successful exploit could allow the attacker to cause the VSH processes to fail to delete, which can lead to a system-wide denial of service (DoS) condition. The attacker must have valid user credentials to log in to the device using the remote management connection.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nx OS · Cisconpm

95%

v < 3.2(3k)v < 6.2(22)v < 7.0(3)i4(9)v < 7.1(5)n1(1b)v < 8.4(1)4.0 ≤ v < 4.0(2e)5.2 ≤ v < 6.2(29)7.0(3)f ≤ v < 9.27.0(3)i7 ≤ v < 7.0(3)i7(4)7.0(3)i7 ≤ v < 7.0(3)i7(6)7.2 ≤ v < 7.3(4)d1(1)7.3 ≤ v < 7.3(5)n1(1)7.3 ≤ v < 8.48.0 ≤ v < 8.2(3)8.3 ≤ v < 8.49.2 ≤ v < 9.2(3)

Affected range stops below 3.2(3k), so it looks safe — our inference, not a vendor statement

Affected range stops below 4.0(2e), so it looks safe — our inference, not a vendor statement

Affected range stops below 6.2(22), so it looks safe — our inference, not a vendor statement

Affected range stops below 6.2(29), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)i4(9), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)i7(4), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0(3)i7(6), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.1(5)n1(1b), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.3(4)d1(1), so it looks safe — our inference, not a vendor statement

Affected range stops below 7.3(5)n1(1), so it looks safe — our inference, not a vendor statement

Affected range stops below 8.2(3), so it looks safe — our inference, not a vendor statement

Affected range stops below 8.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.4(1), so it looks safe — our inference, not a vendor statement

Affected range stops below 9.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.2(3), so it looks safe — our inference, not a vendor statement

cisco-7000-10-slot (environment) · cisco-7000-18-slot (environment) · cisco-7000-4-slot (environment) · cisco-7000-9-slot (environment) · cisco-7700-10-slot (environment) · cisco-7700-18-slot (environment) · cisco-7700-2-slot (environment) · cisco-7700-6-slot (environment) · cisco-mds-9132t (environment) · cisco-mds-9148s (environment) · cisco-mds-9148t (environment) · cisco-mds-9216 (environment) · cisco-mds-9216a (environment) · cisco-mds-9216i (environment) · cisco-mds-9222i (environment) · cisco-mds-9250i (environment) · cisco-mds-9396s (environment) · cisco-mds-9396t (environment) · cisco-mds-9506 (environment) · cisco-mds-9509 (environment) · cisco-mds-9513 (environment) · cisco-mds-9706 (environment) · cisco-mds-9710 (environment) · cisco-mds-9718 (environment) · cisco-n77-f312ck-26 (environment) · cisco-n77-f324fq-25 (environment) · cisco-n77-f348xp-23 (environment) · cisco-n77-f430cq-36 (environment) · cisco-n77-m312cq-26l (environment) · cisco-n77-m324fq-25l (environment) · cisco-n77-m348xp-23l (environment) · cisco-n7k-f248xp-25e (environment) · cisco-n7k-f306ck-25 (environment) · cisco-n7k-f312fq-25 (environment) · cisco-n7k-m202cf-22l (environment) · cisco-n7k-m206fq-23l (environment) · cisco-n7k-m224xp-23l (environment) · cisco-n7k-m324fq-25l (environment) · cisco-n7k-m348xp-25l (environment) · cisco-n9k-c92160yc-x (environment) · cisco-n9k-c9236c (environment) · cisco-n9k-c9272q (environment) · cisco-n9k-c93180lc-ex (environment) · cisco-n9k-c93180yc-ex (environment) · cisco-n9k-c93180yc-fx (environment) · cisco-n9k-c9504-fm-r (environment) · cisco-n9k-c9508-fm-r (environment) · cisco-n9k-x96136yc-r (environment) · cisco-n9k-x9636c-r (environment) · cisco-n9k-x9636c-rx (environment) · cisco-n9k-x9636q-r (environment) · cisco-n9k-x9732c-ex (environment) · cisco-n9k-x9736c-fx (environment) · cisco-nexus-3048 (environment) · cisco-nexus-3524-x-xl (environment) · cisco-nexus-3548-x-xl (environment) · cisco-nexus-36180yc-r (environment) · cisco-nexus-3636c-r (environment) · cisco-nexus-5010 (environment) · cisco-nexus-5020 (environment) · cisco-nexus-5548p (environment) · cisco-nexus-5548up (environment) · cisco-nexus-5596t (environment) · cisco-nexus-5596up (environment) · cisco-nexus-56128p (environment) · cisco-nexus-5624q (environment) · cisco-nexus-5648q (environment) · cisco-nexus-5672up (environment) · cisco-nexus-5672up-16g (environment) · cisco-nexus-5696q (environment) · cisco-nexus-6001 (environment) · cisco-nexus-6004 (environment) · cisco-nexus-7000-supervisor-1 (environment) · cisco-nexus-7000-supervisor-2 (environment) · cisco-nexus-7000-supervisor-2e (environment) · cisco-nexus-7700-supervisor-2e (environment) · cisco-nexus-7700-supervisor-3e (environment) · cisco-ucs-6248up (environment) · cisco-ucs-6296up (environment) · cisco-ucs-6324 (environment) · cisco-ucs-6332 (environment) · cisco-ucs-6332-16up (environment) · cisco-x96136yc-r (environment) · cisco-x9636c-r (environment) · cisco-x9636c-rx (environment) · cisco-x9636q-r (environment)

7000 10-Slot · Ciscodevice

80%

All versions

7000 18-Slot · Ciscodevice

80%

All versions

7000 4-Slot · Ciscodevice

80%

All versions

7000 9-Slot · Ciscodevice

80%

All versions