CVE-2021-3593
3.8
LOW
CVSS 3.1
EPSS 0.02%
Description
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0.
How to fix CVE-2021-3593
To remediate CVE-2021-3593, upgrade the affected package to a fixed version below.
- —upgrade to 4.4.0-1+deb11u2 or later
- —upgrade to 1:4.1-2 or later
Is CVE-2021-3593 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 4.4.0-1+deb11u2
- from 0, < 1:4.1-2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N |