Use After Free in Spice-Space Usbredir
CVE-2021-3700
A use-after-free vulnerability was found in usbredir in versions prior to 0.11.0 in the usbredirparser_serialize() in usbredirparser/usbredirparser.c. This issue occurs when serializing large amounts of buffered write data in the case of a slow or blocked destination.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (21.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Spice-Space Usbredir
- Debian Linux — versions 9.0
- Fedoraproject Fedora — versions 34
- Red Hat Enterprise Linux — versions 6.0, 7.0, 8.0
- Usbredir — versions usbredir 0.11.0
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- gitlab.freedesktop.org/spice/usbredir/-/commit/03c519ff5831ba (Patch, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/03/msg00030.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3700?
- CVE-2021-3700 is a medium-severity vulnerability in Spice-Space Usbredir, classified under Use After Free. CVSS score: 6.4/10. Published 2022-02-24.
- How severe is CVE-2021-3700?
- Medium severity. CVSS v3 base score is 6.4 out of 10.