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High severity7.5NVD Advisory· Published Nov 18, 2021· Updated Jun 17, 2026

CVE-2021-39920

CVE-2021-39920

Description

NULL pointer exception in the IPPUSB dissector in Wireshark 3.4.0 to 3.4.9 allows denial of service via packet injection or crafted capture file

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

12

Wireshark/Wiresharkv53 versions
>=3.4.0, <3.4.10+ 2 more
- (no CPE)range: >=3.4.0, <3.4.10
- (no CPE)range: 3.4.0 to 3.4.9
- cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*range: >=3.4.0,<3.4.10
Fedoraproject/Fedora2 versions
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
osv-coords7 versions
pkg:rpm/suse/wireshark&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2 pkg:rpm/suse/wireshark&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/wireshark&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP2 pkg:rpm/suse/wireshark&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP3 pkg:rpm/opensuse/wireshark&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/wireshark&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/wireshark&distro=openSUSE%20Tumbleweed
< 3.4.10-3.62.1+ 6 more
- (no CPE)range: < 3.4.10-3.62.1
- (no CPE)range: < 3.4.10-3.62.1
- (no CPE)range: < 3.4.10-3.62.1
- (no CPE)range: < 3.4.10-3.62.1
- (no CPE)range: < 3.4.10-lp152.2.21.1
- (no CPE)range: < 3.4.10-3.62.1
- (no CPE)range: < 3.4.10-1.1

Patches

Vulnerability mechanics

References

7

gitlab.com/wireshark/wireshark/-/issues/17705nvdExploitIssue TrackingThird Party Advisory
gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39920.jsonnvdThird Party Advisory
security.gentoo.org/glsa/202210-04nvdThird Party Advisory
www.debian.org/security/2021/dsa-5019nvdThird Party Advisory
www.wireshark.org/security/wnpa-sec-2021-15.htmlnvdVendor Advisory
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/nvd
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/nvd

News mentions

0

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