CVE-2021-3593
3.8 LOWAn invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU
Published: 2021-06-15 · Last updated: 2026-06-17
Severity and scoring
- CVSS
- 3.8 LOW
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
- CWE
- CWE-824
Affected products
| Vendor | Product |
|---|---|
| debian | debian_linux, enterprise_linux, fedora |
| fedoraproject | debian_linux, enterprise_linux, fedora |
| libslirp_project | debian_linux, enterprise_linux, fedora |
| redhat | debian_linux, enterprise_linux, fedora |
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-3593
- [Patch]https://bugzilla.redhat.com/show_bug.cgi?id=1970487
- [Other]https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html
- [Other]https://lists.debian.org/debian-lts-announce/2023/03/msg00013.html
- [Other]https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GCKWZWY64EHTOQMLVLTSZ4AA27EWRJMH/
- [Other]https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SGPQZFVJCFGDSISFXPCQTTBBD7QZLJKI/
- [Other]https://security.gentoo.org/glsa/202107-44
- [Other]https://security.netapp.com/advisory/ntap-20210805-0004/
- [Patch]https://bugzilla.redhat.com/show_bug.cgi?id=1970487
- [Other]https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html
- [Other]https://lists.debian.org/debian-lts-announce/2023/03/msg00013.html
- [Other]https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GCKWZWY64EHTOQMLVLTSZ4AA27EWRJMH/
- [Other]https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SGPQZFVJCFGDSISFXPCQTTBBD7QZLJKI/
- [Other]https://security.gentoo.org/glsa/202107-44
- [Other]https://security.netapp.com/advisory/ntap-20210805-0004/
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