CVE-2021-39926
published 2021-11-19CVE-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
PriorityP345high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
7.96%
94.7th percentile
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
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | wireshark | < wireshark 3.6.0-1 (bookworm) | wireshark 3.6.0-1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| msrc | cbl2_wireshark_3.4.14-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
| wireshark | wireshark | >= 0 < 3.4.10-0+deb11u1 | 3.4.10-0+deb11u1 |
| wireshark | wireshark | >= 0 < 3.6.0-1 | 3.6.0-1 |
| wireshark | wireshark | >= 0 < 3.6.0-1 | 3.6.0-1 |
| wireshark | wireshark | >= 0 < 3.6.0-1 | 3.6.0-1 |
| wireshark | wireshark | 3.4.0 – 3.4.9 | — |
| wireshark_foundation | wireshark | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
osv7.5HIGH
vendor_debian7.5HIGH
vendor_msrc7.5HIGH
vendor_redhat7.5HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
wireshark: bluetooth HCI_ISO dissector crash
vendor_redhat·2021-11-17·CVSS 7.5
CVE-2021-39926 [HIGH] CWE-120 wireshark: bluetooth HCI_ISO dissector crash
wireshark: bluetooth HCI_ISO dissector crash
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
A flaw was found in Wireshark. A process failure on crafted or malformed HCI_ISO input can cause a denial of service via packet injection or a crafted capture file.
Package: wireshark (Red Hat Enterprise Linux 6) - Not affected
Package: wireshark (Red Hat Enterprise Linux 7) - Not affected
Package: wireshark (Red Hat Enterprise Linux 8) - Not affected
Package: wireshark (Red Hat Enterprise Linux 9) - Not affected
Microsoft
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
vendor_msrc·2021-11-09·CVSS 7.5
CVE-2021-39926 [HIGH] CWE-120 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
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
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
GitLab: Git
Debian
CVE-2021-39926: wireshark - Buffer overflow in the Bluetooth HCI_ISO dissector in Wireshark 3.4.0 to 3.4.9 a...
vendor_debian·2021·CVSS 7.5
CVE-2021-39926 [HIGH] CVE-2021-39926: wireshark - Buffer overflow in the Bluetooth HCI_ISO dissector in Wireshark 3.4.0 to 3.4.9 a...
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
Scope: local
bookworm: resolved (fixed in 3.6.0-1)
bullseye: resolved (fixed in 3.4.10-0+deb11u1)
forky: resolved (fixed in 3.6.0-1)
sid: resolved (fixed in 3.6.0-1)
trixie: resolved (fixed in 3.6.0-1)
GHSA
GHSA-g42c-hpcx-483f: Buffer overflow in the Bluetooth HCI_ISO dissector in Wireshark 3
ghsa_unreviewed·2021-11-20
CVE-2021-39926 [HIGH] CWE-120 GHSA-g42c-hpcx-483f: Buffer overflow in the Bluetooth HCI_ISO dissector in Wireshark 3
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
OSV
CVE-2021-39926: Buffer overflow in the Bluetooth HCI_ISO dissector in Wireshark 3
osv·2021-11-19·CVSS 7.5
CVE-2021-39926 [HIGH] CVE-2021-39926: Buffer overflow in the Bluetooth HCI_ISO dissector in Wireshark 3
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
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39926.jsonhttps://gitlab.com/wireshark/wireshark/-/issues/17649https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/https://security.gentoo.org/glsa/202210-04https://www.debian.org/security/2021/dsa-5019https://www.wireshark.org/security/wnpa-sec-2021-08.htmlhttps://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39926.jsonhttps://gitlab.com/wireshark/wireshark/-/issues/17649https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/https://security.gentoo.org/glsa/202210-04https://www.debian.org/security/2021/dsa-5019https://www.wireshark.org/security/wnpa-sec-2021-08.html
2021-11-19
Published