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TI-2023-02676 Aliases CVE-2023-2856GHSA-c9g4-j4fr-ggh2

Out-of-bounds write in Wireshark

Priority MEDIUM 62CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 4 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

VMS TCPIPtrace file parser crash in Wireshark 4.0.0 to 4.0.5 and 3.6.0 to 3.6.13 allows denial of service via crafted capture file

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01787 78th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Wireshark (Wireshark Foundation): 4.0.6, 3.6.14Red Hat: 2 advisoriesRed Hat: 4 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Wireshark FoundationWireshark4.0.0 to before 4.0.6; 3.6.0 to before 3.6.144.0.6, 3.6.14Patch availableCNA
  • Wireshark VendorWireshark Foundation Affected 4.0.0 to before 4.0.6; 3.6.0 to before 3.6.14 Fixed in 4.0.6, 3.6.14 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*3.6.0 to before 3.6.14; 4.0.0 to before 4.0.6VulnerableWireshark Foundation
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*12.0VulnerableDebian
  • cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:* Versions 3.6.0 to before 3.6.14; 4.0.0 to before 4.0.6 Vulnerable ·Wireshark Foundation
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* Versions 12.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Wireshark (Wireshark Foundation) Fixed in 4.0.6, 3.6.14

Red Hat 2 advisories

  • RHSA-2023:7015 Released 2023-11-14 · Red Hat rating Moderate
    wireshark security update
    • Red Hat CodeReady Linux Builder (v. 8) wireshark-devel-1:2.6.2-17.el8
    • Red Hat Enterprise Linux AppStream (v. 8) wireshark-1:2.6.2-17.el8, wireshark-cli-1:2.6.2-17.el8
  • RHSA-2023:6469 Released 2023-11-07 · Red Hat rating Moderate
    wireshark security update
    • Red Hat CodeReady Linux Builder (v. 9) wireshark-devel-1:3.4.10-6.el9
    • Red Hat Enterprise Linux AppStream (v. 9) wireshark-1:3.4.10-6.el9, wireshark-cli-1:3.4.10-6.el9

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2023:7015
Red Hat CodeReady Linux Builder (v. 9)Fixed RHSA-2023:6469
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:7015
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:6469

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-2856
  2. 2026-10-03 Alias added: GHSA-c9g4-j4fr-ggh2

References

Exploit 1

Advisory 5

  • TI-2026-53718 Heap-based Buffer Overflow in Wireshark CVSS 3.1CRITICAL 9.8
  • TI-2026-63612 Heap-based Buffer Overflow in Wireshark CVSS 3.1HIGH 8.8
  • TI-2024-16149 A buffer overflow in Wireshark before 4.2.0 allows a remote attacker to cause a denial of… CVSS 3.1HIGH 7.5
  • TI-2010-00291 Multiple buffer overflows in the LWRES dissector in Wireshark 0.9.15 through 1.0.10 and… CVSS 2.0HIGH 7.5
  • TI-2026-63614 Heap-based Buffer Overflow in Wireshark CVSS 3.1HIGH 8.1
  • TI-2014-01823 Buffer overflow in the mpeg_read function in wiretap/mpeg.c in the MPEG parser in… CVSS 2.0HIGH 9.3
See all 794 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences