CVE-2026-76881
published 2026-08-19CVE-2026-76881: CMS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
PriorityP417medium5.5CVSS 3.1
AVLACLPRNUIRSUCNINAH
EPSS
0.14%
3.2th percentile
CMS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| gitlab | wireshark | — | — |
| wireshark | wireshark | — | — |
| wireshark | wireshark | >= 4.4.0 < 4.4.18 | 4.4.18 |
| wireshark | wireshark | >= 4.6.0 < 4.6.8 | 4.6.8 |
| wireshark_foundation | wireshark | >= 4.4.0 < 4.4.18 | 4.4.18 |
| wireshark_foundation | wireshark | >= 4.6.0 < 4.6.8 | 4.6.8 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
vendor_redhat4.7MEDIUM
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VulDB
Wireshark up to 4.4.17/4.6.7 Dissector resource consumption
vuldb·2026-08-20·CVSS 4.7
CVE-2026-76881 [MEDIUM] Wireshark up to 4.4.17/4.6.7 Dissector resource consumption
A vulnerability was found in Wireshark up to 4.4.17/4.6.7. It has been classified as problematic. The impacted element is an unknown function of the component Dissector. The manipulation leads to resource consumption.
This vulnerability is uniquely identified as CVE-2026-76881. The attack is possible to be carried out remotely. No exploit exists.
Upgrading the affected component is recommended.
GHSA
CMS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
ghsa_unreviewed·2026-08-20
CVE-2026-76881 [MEDIUM] CWE-476 CMS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
CMS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Red Hat
wireshark: Wireshark: Denial of service via CMS protocol dissector crash
vendor_redhat·2026-08-19·CVSS 4.7
CVE-2026-76881 [MEDIUM] CWE-476 wireshark: Wireshark: Denial of service via CMS protocol dissector crash
wireshark: Wireshark: Denial of service via CMS protocol dissector crash
A flaw was found in Wireshark. A NULL pointer dereference vulnerability exists within the CMS (Cryptographic Message Syntax) protocol dissector. This issue can be triggered by processing a specially crafted network capture file, leading to an application crash. A remote attacker could exploit this to cause a denial of service (DoS).
Statement: A NULL pointer dereference was found in the CMS protocol dissector in Wireshark versions 4.4.0 through 4.4.18 and 4.6.0 through 4.6.7. Red Hat Enterprise Linux 6, 7, 8, and 9 ship Wireshark versions prior to the affected range and are not vulnerable. Red Hat Enterprise Linux 10 and Red Hat In-Vehicle OS ship an affected version of Wireshark.
Mitigation: Do not open untrusted
GitLab
NULL Pointer Dereference in Wireshark
vendor_gitlab·2026-08-19·CVSS 4.7
CVE-2026-76881 [MEDIUM] CWE-476 NULL Pointer Dereference in Wireshark
NULL Pointer Dereference in Wireshark
CMS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Affected products: Wireshark
Affected versions: >=4.6.0, =4.4.0, <4.4.18 (affected)
Solution: Upgrade to version 4.6.8 or above
Credit: Aisle Research (Dmitrijs Trizna, Luigino Camastra, Ze Sheng (O2Lab & TAMU), Igor Morgenstern)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-76881 wireshark: Wireshark: Denial of service via CMS protocol dissector crash [fedora-all]
bugzilla·2026-08-20·CVSS 4.7
CVE-2026-76881 [MEDIUM] CVE-2026-76881 wireshark: Wireshark: Denial of service via CMS protocol dissector crash [fedora-all]
CVE-2026-76881 wireshark: Wireshark: Denial of service via CMS protocol dissector crash [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
CMS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Bugzilla
CVE-2026-76881 wireshark: Wireshark: Denial of service via CMS protocol dissector crash
bugzilla·2026-08-19·CVSS 4.7
CVE-2026-76881 [MEDIUM] CVE-2026-76881 wireshark: Wireshark: Denial of service via CMS protocol dissector crash
CVE-2026-76881 wireshark: Wireshark: Denial of service via CMS protocol dissector crash
CMS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
2026-08-19
Published