Description
In Wireshark 3.2.0 to 3.2.6, 3.0.0 to 3.0.13, and 2.6.0 to 2.6.20, the TCP dissector could crash. This was addressed in epan/dissectors/packet-tcp.c by changing the handling of the invalid 0xFFFF checksum.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | wireshark | 3.2.7-1 | — |
| Debian 13 | wireshark | 3.2.7-1 | — |
| Debian 12 | wireshark | 3.2.7-1 | — |
| Debian 9 | wireshark | 2.6.20-0+deb9u1 | DLA-2547-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | wireshark | 3.2.3-1ubuntu0.1~esm1 | USN-6262-1 |
| Ubuntu Pro 18.04 LTS | wireshark | 2.6.10-1~ubuntu18.04.0+esm1 | USN-6262-1 |
| Ubuntu Pro 16.04 LTS | wireshark | 2.6.10-1~ubuntu16.04.0+esm1 | USN-6262-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | wireshark | 2.6.10-1~ubuntu14.04.0~esm2 | USN-6262-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | wireshark | 3.2.7-3.41.1 | SUSE-SU-2020:3166-1 |
| SLES 15 SP1 | wireshark | 3.2.7-3.41.1 | SUSE-SU-2020:3166-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | wireshark | 3.4.8-1.2 | openSUSE-SU-2024:11513-1 |
| openSUSE Leap 15.2 | wireshark | 3.2.7-lp152.2.6.1 | openSUSE-SU-2020:1882-1 |
| openSUSE Leap 15.1 | wireshark | 3.2.7-lp151.2.15.1 | openSUSE-SU-2020:1878-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | wireshark | 3.2.7-r0 | — |
| Alpine v3.23 | wireshark | 3.2.7-r0 | — |
| Alpine v3.22 | wireshark | 3.2.7-r0 | — |
| Alpine v3.21 | wireshark | 3.2.7-r0 | — |
| Alpine v3.20 | wireshark | 3.2.7-r0 | — |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | wireshark | 3.2.7-r0 | — |
| Alpine v3.18 | wireshark | 3.2.7-r0 | — |
| Alpine v3.17 | wireshark | 3.2.7-r0 | — |
| Alpine v3.16 | wireshark | 3.2.7-r0 | — |
| Alpine v3.15 | wireshark | 3.2.7-r0 | — |
| Alpine v3.14 | wireshark | 3.2.7-r0 | — |
| Alpine v3.13 | wireshark | 3.2.7-r0 | — |
| Alpine v3.12 | wireshark | 3.2.7-r0 | — |
| Alpine v3.11 | wireshark | 3.0.14-r0 | — |
| Alpine v3.10 | wireshark | 3.0.14-r0 | — |
| Alpine v3.9 | wireshark | 2.6.20-r0 | — |
Advisories 7
- USN-6262-1 wireshark vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- DLA-2547-1 wireshark - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2020:1878-1 Security update for wireshark SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1882-1 Security update for wireshark SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3166-1 Security update for wireshark SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11513-1 libwireshark14-3.4.8-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-1917 Wireshark: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Jul 30, 2023
References
- https://www.wireshark.org/security/wnpa-sec-2020-12.html
- https://gitlab.com/wireshark/wireshark/-/issues/16816
- https://gitlab.com/wireshark/wireshark/-/commit/7f3fe6164a68b76d9988c4253b24d43f498f1753
- FEDORA-2020-1b390bec14 vendor-advisory
- FEDORA-2020-1bf4b97c16 vendor-advisory
- FEDORA-2020-9bda6ae1cd vendor-advisory
- openSUSE-SU-2020:1878 vendor-advisory
- openSUSE-SU-2020:1882 vendor-advisory
- https://www.oracle.com/security-alerts/cpujan2021.html
- [debian-lts-announce] 20210206 [SECURITY] [DLA 2547-1] wireshark security update mailing-list