NULL Pointer Dereference Affecting qemu package, versions <2.1+dfsg-5


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.41% (32nd percentile)

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  • Snyk IDSNYK-ECHOLATEST-QEMU-18321635
  • published27 Jul 2026
  • disclosed7 Nov 2014

Introduced: 7 Nov 2014

CVE-2014-3640  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Echo:latest qemu to version 2.1+dfsg-5 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu package and not the qemu package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

The sosendto function in slirp/udp.c in QEMU before 2.1.2 allows local users to cause a denial of service (NULL pointer dereference) by sending a udp packet with a value of 0 in the source port and address, which triggers access of an uninitialized socket.

CVSS Base Scores

version 3.1