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TI-2026-53711 Aliases CVE-2026-76879GHSA-wjf3-82r2-8vvm

Stack-based Buffer Overflow in Wireshark

Priority LOW 39CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-121 and the CVSS impact.

Summary

C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00312 24th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Wireshark (Wireshark Foundation): 4.6.8, 4.4.18Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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 FoundationWireshark4.6.0 to before 4.6.8; 4.4.0 to before 4.4.184.6.8, 4.4.18Patch availableCNA
  • Wireshark VendorWireshark Foundation Affected 4.6.0 to before 4.6.8; 4.4.0 to before 4.4.18 Fixed in 4.6.8, 4.4.18 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*4.4.0 to before 4.4.18; 4.6.0 to before 4.6.8VulnerableWireshark Foundation
  • cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:* Versions 4.4.0 to before 4.4.18; 4.6.0 to before 4.6.8 Vulnerable ·Wireshark Foundation

Remediation

  • Fix · CNA Wireshark (Wireshark Foundation) Fixed in 4.6.8, 4.4.18

Red Hat 1 advisory

  • RHSA-2026:84721 Released 2026-10-19 · Red Hat rating Important
    wireshark security update
    • Red Hat Enterprise Linux AppStream (v. 10) wireshark-1:4.4.2-10.el10_2.8, wireshark-cli-1:4.4.2-10.el10_2.8
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) wireshark-devel-1:4.4.2-10.el10_2.8

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Wireshark 4.4.18, 4.6.8

    25 records Highest priority Priority HIGH 2 HIGH, 4 MEDIUM, 19 LOW

    Other records, highest priority first

    • TI-2026-53718 Heap-based Buffer Overflow in WiresharkPriority HIGH 76
    • TI-2026-53720 Heap-based Buffer Overflow in WiresharkPriority HIGH 66
    • TI-2026-53716 Buffer Over-read in WiresharkPriority MEDIUM 62
    Show all 25 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:84721
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:84721
Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-76879
  2. 2026-10-03 Alias added: GHSA-wjf3-82r2-8vvm
  3. 2026-10-19 Fix available: RHSA-2026:84721 · Red Hat
  4. 2026-10-20 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · Red Hat

References

Exploit 1

Advisory 1

  • 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