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CVE-2024-2551 — PAN-OS: Firewall Denial of Service (DoS) Using a Specially Crafted Packet

CVE-2024-2551 · PAN-OS · CVSS 7.5

In brief

Severity · CVSS
High7.5CVSS 3.1, High
EPSS
0.48%
CISA KEV
Not listed
Products
PAN-OS
Published · Modified
·
Last verified

Summary

A null pointer dereference vulnerability in Palo Alto Networks PAN-OS software enables an unauthenticated attacker to stop a core system service on the firewall by sending a crafted packet through the data plane that causes a denial of service (DoS) condition. Repeated attempts to trigger this condition result in the firewall entering maintenance mode.

Weakness: CWE-476

Title, description and the vendor's statements are quoted from the CVE record; a vendor's advisory is summarised in Patcharo's words, with a link.

Affected and fixed versions

Per product and release branch, as the vendor's CVE record and official advisory state them. A fixed release is shown only when a document names it: the vendor's, or CERT-FR's for Check Point, with its source.

3 branches with a published fixed release

Palo Alto Networks PAN-OS

Source: CVE-2024-2551

  1. 11.2Approaching end of support
    Affected versionsNot affected
    First fixed release—
  2. 11.1Approaching end of support
    Affected versionsNot affected
    First fixed release—
  3. 11.0End of life
    Affected versions>= 11.0.0, < 11.0.5
    First fixed release11.0.5
  4. 10.2End of life
    Affected versions>= 10.2.0, < 10.2.4-h6
    First fixed release10.2.4-h610.2.5
  5. 10.1End of life
    Affected versions>= 10.1.0, < 10.1.14
    First fixed release10.1.14

Releases the vendor does not list are not affected.

Remediation

Fix available

Vendor fix

  • PAN-OS 11.011.0.5
  • PAN-OS 10.210.2.4-h6, 10.2.5
  • PAN-OS 10.110.1.14

Upgrade to a fixed release listed above for your branch, or to a later fixed release the vendor explicitly supports.

This issue is fixed in PAN-OS 10.1.14, PAN-OS 10.2.4-h6, PAN-OS 10.2.5, PAN-OS 11.0.5, and all later PAN-OS versions.

SourcePalo Alto Networks (CVE record)

CERT-FR recommendation

Refer to the vendor's security bulletin to obtain patches (see Documentation section).

SourceCERTFR-2024-AVI-0986

Last verified 1 Oct 2026 at 13:37 UTC

Known exploitation

Not listed in CISA KEV as of the last check.

0.48% probability of exploitation in the next 30 days (percentile 39%).

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CERT-FR

1 document of the French national CERT (ANSSI) references this CVE.

Advisory (AVI)CERTFR-2024-AVI-0986Published 14 Nov 2024

Multiple vulnerabilities in Palo Alto Networks products

Remote denial of serviceRemote cross-site scripting (XSS)Data integrity breachNot specified by the vendorSecurity policy bypassData confidentiality breach

Summary

Multiple vulnerabilities have been discovered in Palo Alto Networks products. Some of them allow an attacker to cause a remote denial of service, a data confidentiality breach, and a data integrity breach.

Recommendation

Refer to the vendor's security bulletin to obtain patches (see Documentation section).

Official document on cert.ssi.gouv.frread by Patcharo 28 Sept 2026 at 20:04 UTCMachine translation of the French text published by CERT-FR; a text whose translation did not pass Patcharo's checks stays in French. Identifiers, versions and links are copied unchanged.

Timeline

  1. Published by the source
  2. Source record last modified
  3. EPSS score computed
  4. Last verified by Patcharo

Official sources

Vendor advisory

Palo Alto Networks · NVD · FIRST EPSS

How Patcharo reads this

Affected and fixed releases come from the vendor's structured statements and are matched against exact versions; CVSS from NVD, exploitation from CISA KEV and the vendor's own advisory, probability from FIRST EPSS. Missing data stays Unknown and never becomes Not affected.

Read the methodologyRead the guide: PAN-OS versions explained: release lines, maintenance releases and the -h1, -h2, -h3 suffixes

Related vulnerabilities

Other records affecting the same products, newest first.

  • CVE-2026-0301PAN-OS: Information Disclosure Vulnerability in URL FilteringHigh
  • CVE-2026-0280PAN-OS: IPv6 Firewall Policy BypassHigh
  • CVE-2026-0281PAN-OS: Information Disclosure Vulnerability in Management Web InterfaceHigh
  • CVE-2026-0283PAN-OS: Authentication Bypass Vulnerability in Large Scale VPN (LSVPN)High
  • CVE-2026-0284PAN-OS: XML Injection Vulnerability in Large Scale VPN (LSVPN)Critical

All PAN-OS vulnerabilitiesAll Palo Alto Networks vulnerabilities