CVE-2021-39926: Buffer overflow in the Bluetooth HCI_ISO dissector in Wireshark 3.4.0 to 3.4.9 allows denial of service via packet injection or crafted capture file

High severity · published Nov 19, 2021

CVE-2021-39926

Buffer overflow in the Bluetooth HCI_ISO dissector in Wireshark 3.4.0 to 3.4.9 allows denial of service via packet injection or crafted capture file

7.5

CVSS

EPSS

On KEV

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)8.0% · higher than 95% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Debian Linux · Debian

10.0; 11.0 · source: NVD

Fedora · Fedoraproject

34; 35 · source: NVD

Wireshark · Wireshark

3.4.0 through 3.4.9 · source: NVD

Affected product

Debian Linux

Debian

All Debian Linux CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2021-39926

CVE.org

https://www.cve.org/CVERecord?id=CVE-2021-39926

Third Party Advisory

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39926.json

Exploit

https://gitlab.com/wireshark/wireshark/-/issues/17649

lists.fedoraproject.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/

lists.fedoraproject.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/

Third Party Advisory

https://security.gentoo.org/glsa/202210-04

Third Party Advisory

https://www.debian.org/security/2021/dsa-5019