PAN-OS: Firewall Denial of Service (DoS) via a Burst of Crafted Packets

published 2024-04-10 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-31971

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits: 0; none known

A memory leak exists in Palo Alto Networks PAN-OS software that enables an attacker to send a burst of crafted packets through the firewall that eventually prevents the firewall from processing traffic. This issue applies only to PA-5400 Series devices that are running PAN-OS software with the SSL Forward Proxy feature enabled.

Patch / fix

fixed in 1

Palo Alto Networks PAN-OS 9.0.0, 9.1.0, 10.1.0, 10.2.7-h3, 11.0.4, 11.1.2

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 14 mo ago (2025-08-15)

Exploit prediction

0.92% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Palo Alto Networks PAN-OS
Palo Alto Networks Cloud NGFW
Palo Alto Networks Prisma Access

Classification

Weakness

CWE-770 Allocation of Resources Without Limits or Throttling
CWE-401 Missing Release of Memory after Effective Lifetime

Technology feeds

Palo Alto PAN-OS rss critical rss

References

security.paloaltonetworks.com /CVE-2024-3382
vendor-advisory

Sources

CVE List CVE-2024-3382
NVD CVE-2024-3382

Fencer Vulns 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.

Summary