How severe is CVE-2024-30403?

CVE-2024-30403 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-30403 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-30403?

CVE-2024-30403 primarily affects Juniper Junos Os Evolved. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-30403?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-30403 have an EU (EUVD) identifier?

Yes. CVE-2024-30403 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-28324.

When was CVE-2024-30403 published?

CVE-2024-30403 was published on 2024-04-12 and last updated on 2026-06-17.

CVE-2024-30403

CVE-2024-30403 is a medium-severity vulnerability in Juniper Junos Os Evolved with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-28324
Weakness: CWE-476
Affected product: Juniper Junos Os Evolved
Published: 2024-04-12
Last modified: 2026-06-17

Description

A NULL Pointer Dereference vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). When Layer 2 traffic is sent through a logical interface, MAC learning happens. If during this process, the interface flaps, an Advanced Forwarding Toolkit manager (evo-aftmand-bt) core is observed. This leads to a PFE restart. The crash reoccurs if the same sequence of events happens, which will lead to a sustained DoS condition. This issue affects Juniper Networks Junos OS Evolved 23.2-EVO versions earlier than 23.2R1-S1-EVO, 23.2R2-EVO.

Frequently asked questions

What is CVE-2024-30403?: A NULL Pointer Dereference vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). When Layer 2 traffic is sent through a logical interface, MAC learning happens. If during this process, the interface flaps, an Advanced Forwarding Toolkit manager (evo-aftmand-bt) core is observed. This leads to a PFE restart. The crash reoccurs if the same sequence of events happens, which will lead to a sustained DoS condition. This issue affects Juniper Networks Junos OS Evolved 23.2-EVO versions earlier than 23.2R1-S1-EVO, 23.2R2-EVO.
How severe is CVE-2024-30403?: CVE-2024-30403 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-30403 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-30403?: CVE-2024-30403 primarily affects Juniper Junos Os Evolved. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-30403?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-30403 have an EU (EUVD) identifier?: Yes. CVE-2024-30403 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-28324.
When was CVE-2024-30403 published?: CVE-2024-30403 was published on 2024-04-12 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:juniper:junos_os_evolved:23.2:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:23.2:r1:*:*:*:*:*:*

More vulnerabilities in Juniper Junos Os Evolved

CVE-2021-0211 — Critical (CVSS 10.0): An improper check for unusual or exceptional conditions in Juniper Networks Junos OS and Junos OS Evolved Routing…
CVE-2026-21902 — Critical (CVSS 9.8): An Incorrect Permission Assignment for Critical Resource vulnerability in the On-Box Anomaly detection framework of…
CVE-2023-28983 — High (CVSS 8.8): An OS Command Injection vulnerability in gRPC Network Operations Interface (gNOI) server module of Juniper Networks…
CVE-2021-0208 — High (CVSS 8.8): An improper input validation vulnerability in the Routing Protocol Daemon (RPD) service of Juniper Networks Junos OS…
CVE-2020-1632 — High (CVSS 8.6): In a certain condition, receipt of a specific BGP UPDATE message might cause Juniper Networks Junos OS and Junos OS…
CVE-2024-47490 — High (CVSS 8.2): An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in the Packet Forwarding Engine…

All CVEs affecting Juniper Junos Os Evolved →

Other CWE-476 (NULL Pointer Dereference) vulnerabilities

CVE-2022-36648 — Critical (CVSS 10.0): The hardware emulation in the of_dpa_cmd_add_l2_flood of rocker device model in QEMU, as used in 7.0.0 and earlier,…
CVE-2020-14500 — Critical (CVSS 10.0): Secomea GateManager all versions prior to 9.2c, An attacker can send a negative value and overwrite arbitrary data.
CVE-2010-2495 — Critical (CVSS 10.0): The pppol2tp_xmit function in drivers/net/pppol2tp.c in the L2TP implementation in the Linux kernel before 2.6.34 does…
CVE-2026-46195 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: smb: client: validate dacloffset before building…
CVE-2026-31657 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: batman-adv: hold claim backbone gateways by…
CVE-2026-31436 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix possible wrong descriptor…

Browse all CWE-476 (NULL Pointer Dereference) vulnerabilities →