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Fencer Intel
high 8.1

CVE-2026-95387 json

Heap-based Buffer Overflow in Wireshark

published last mo. modified last mo. also EUVD-2026-88703

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 18%
public exploits
0
none known

Summary

SPDY protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service

Patch / fix

  • Wireshark Foundation Wireshark 4.4.19, 4.6.9
  • wireshark Debian 13 4.4.19-0+deb13u1
  • wireshark Debian 14 4.6.9-1

debian advisories DEBIAN-CVE-2026-95387

  • wireshark RHEL 10.2 1:4.4.2-10.el10_2.8
  • wireshark-cli RHEL 10.2 1:4.4.2-10.el10_2.8
  • wireshark RHEL 9 1:3.4.10-9.el9_8.5
  • wireshark-cli RHEL 9 1:3.4.10-9.el9_8.5

red hat advisories RHSA-2026:84721RHSA-2026:83546

  • wireshark openSUSE Tumbleweed 4.6.9-1.1

opensuse advisories openSUSE-SU-2026:11912-1

  • wireshark AlmaLinux 8 1:2.6.2-22.el8_10
  • wireshark-cli AlmaLinux 8 1:2.6.2-22.el8_10
  • wireshark AlmaLinux 10 1:4.4.2-10.el10_2.8
  • wireshark-cli AlmaLinux 10 1:4.4.2-10.el10_2.8
  • wireshark AlmaLinux 9 1:3.4.10-9.el9_8.5
  • wireshark-cli AlmaLinux 9 1:3.4.10-9.el9_8.5

almalinux advisories ALSA-2026:93627ALSA-2026:84721ALSA-2026:83546

  • wireshark Rocky Linux 8 1:2.6.2-22.el8_10
  • wireshark Rocky Linux 10 1:4.4.2-10.el10_2.8
  • wireshark Rocky Linux 9 1:3.4.10-9.el9_8.5

rocky linux advisories RLSA-2026:93627RLSA-2026:84721RLSA-2026:83546

Is CVE-2026-95387 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-95387 updated cvss 8.1

wireshark: wireshark: Denial of Service via heap-based buffer overflow in SPDY dissector

  • Red Hat Enterprise Linux 6 wireshark, wireshark-gnome Red Hat Enterprise Linux 7 wireshark, wireshark-gnome
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AppStream (v. 8) wireshark 2.6.2-22.el8_10, wireshark-cli 2.6.2-22.el8_10
    fixed: vendor fix RHSA-2026:93627
  • Red Hat Enterprise Linux AppStream (v. 9) wireshark 3.4.10-14.el9_9, wireshark 3.4.10-9.el9_8.5, wireshark-cli 3.4.10-14.el9_9, wireshark-cli 3.4.10-9.el9_8.5
    fixed: vendor fix RHSA-2026:83546
  • Red Hat Enterprise Linux AppStream (v. 10) wireshark 4.4.2-10.el10_2.8, wireshark 4.4.2-10.el10_3.8, wireshark-cli 4.4.2-10.el10_2.8, wireshark-cli 4.4.2-10.el10_3.8
    fixed: vendor fix RHSA-2026:84721
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) wireshark-devel 3.4.10-14.el9_9, wireshark-devel 3.4.10-9.el9_8.5, wireshark-debuginfo 3.4.10-14.el9_9, wireshark-debuginfo 3.4.10-9.el9_8.5, wireshark-debugsource 3.4.10-14.el9_9, wireshark-debugsource 3.4.10-9.el9_8.5, +2 more
    fixed: vendor fix RHSA-2026:83546
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) wireshark-devel 4.4.2-10.el10_2.8, wireshark-devel 4.4.2-10.el10_3.8, wireshark-debuginfo 4.4.2-10.el10_2.8, wireshark-debuginfo 4.4.2-10.el10_3.8, wireshark-debugsource 4.4.2-10.el10_2.8, wireshark-debugsource 4.4.2-10.el10_3.8, +2 more
    fixed: vendor fix RHSA-2026:84721
  • Red Hat Enterprise Linux CRB (v. 8) wireshark-devel 2.6.2-22.el8_10, wireshark-debuginfo 2.6.2-22.el8_10, wireshark-debugsource 2.6.2-22.el8_10, wireshark-cli-debuginfo 2.6.2-22.el8_10
    fixed: vendor fix RHSA-2026:93627

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
last mo.

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-11).

Exploits and checks

  • gitlab.com https://gitlab.com/wireshark/wireshark/-/work_items/21487 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Wireshark Foundation Wireshark

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.