CVE-2026-5407
published 2026-04-30CVE-2026-5407: SMB2 protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
PriorityP419medium5.5CVSS 3.1
AVLACLPRNUIRSUCNINAH
EPSS
0.14%
3.6th percentile
SMB2 protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| gitlab | wireshark | — | — |
| wireshark | wireshark | — | — |
| wireshark | wireshark | 4.4.0 – 4.4.14 | — |
| wireshark | wireshark | 4.6.0 – 4.6.4 | — |
| wireshark_foundation | wireshark | >= 4.4.0 < 4.4.15 | 4.4.15 |
| wireshark_foundation | wireshark | >= 4.6.0 < 4.6.5 | 4.6.5 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
vendor_redhat5.5MEDIUM
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GitLab
Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark
vendor_gitlab·2026-04-30·CVSS 5.5
CVE-2026-5407 [MEDIUM] CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark
Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark
SMB2 protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
Affected products: Wireshark
Affected versions: >=4.6.0, =4.4.0, <4.4.15 (affected)
Solution: Upgrade to version 4.6.5 or above
Credit: Brendan Coles
Red Hat
Wireshark: Wireshark: Denial of Service from malicious SMB2 protocol data
vendor_redhat·2026-04-30·CVSS 5.5
CVE-2026-5407 [MEDIUM] CWE-835 Wireshark: Wireshark: Denial of Service from malicious SMB2 protocol data
Wireshark: Wireshark: Denial of Service from malicious SMB2 protocol data
A flaw was found in Wireshark, a network protocol analyzer. An attacker could exploit this vulnerability by providing a specially crafted network capture file containing malicious SMB2 protocol data. This could trigger an infinite loop in Wireshark's SMB2 analysis component, leading to a denial of service (DoS) where the application becomes unresponsive.
Mitigation: To mitigate this issue, users should exercise caution and avoid opening untrusted or suspicious network capture files with Wireshark. Running Wireshark within a sandboxed environment, such as a container or a virtual machine, can further limit the potential impact of processing malicious data.
Package: wireshark (Red Hat Enterprise Linux 10) - Fix defe
GHSA
GHSA-wwc3-65mg-qwxf: SMB2 protocol dissector infinite loop in Wireshark 4
ghsa_unreviewed·2026-04-30
CVE-2026-5407 [MEDIUM] CWE-835 GHSA-wwc3-65mg-qwxf: SMB2 protocol dissector infinite loop in Wireshark 4
SMB2 protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-5407 wireshark: Wireshark: Denial of Service from malicious SMB2 protocol data [fedora-all]
bugzilla·2026-05-04·CVSS 5.5
CVE-2026-5407 [MEDIUM] CVE-2026-5407 wireshark: Wireshark: Denial of Service from malicious SMB2 protocol data [fedora-all]
CVE-2026-5407 wireshark: Wireshark: Denial of Service from malicious SMB2 protocol data [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.
Bugzilla
CVE-2026-5407 Wireshark: Wireshark: Denial of Service from malicious SMB2 protocol data
bugzilla·2026-04-30·CVSS 5.5
CVE-2026-5407 [MEDIUM] CVE-2026-5407 Wireshark: Wireshark: Denial of Service from malicious SMB2 protocol data
CVE-2026-5407 Wireshark: Wireshark: Denial of Service from malicious SMB2 protocol data
SMB2 protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
2026-04-30
Published