CVE-2024-5564VulnerabilityPublished 31 May 2024Updated 20 Nov 2025

CVE-2024-5564: libndp · Classic Buffer Overflow

Affects libndpSource CVE Database V5

Not known to be exploited · CVSS 8.1 High.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

8.1High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 1.1% chance of exploitation in 30 days – higher than 67% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Network
Attack Complexity: High
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: High: A successful attack depends on conditions beyond the attacker's control. That is, a successful attack cannot be accomplished at will, but requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected. For example, a successful attack may require an attacker to: gather knowledge about the environment in which the vulnerable target/component exists; prepare the target environment to improve exploit reliability; or inject themselves into the logical network path between the target and the resource requested by the victim in order to read and/or modify network communications (e.g., a man in the middle attack).
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 31 May 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Red Hatredhat/libndp`pkg:rpm/redhat/libndp`Other threats	Affected =1.0	Fixed in–

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AI-suggested

1. Upgrade NetworkManager to a version that includes the patch for CVE-2024-5564 as soon as it becomes available from your Linux distribution vendor. 2. If immediate patching is not possible, implement network-level filtering to block or restrict unsolicited IPv6 router advertisement packets from untrusted sources, using firewall rules or router configurations. 3. Employ Intrusion Detection/Prevention Systems (IDS/IPS) capable of detecting malformed IPv6 NDP packets to alert or block suspicious traffic. 4. Conduct network segmentation to isolate critical systems and reduce exposure to potentially malicious IPv6 traffic. 5. Monitor system logs and network traffic for anomalies related to IPv6 router advertisements. 6. Enforce strict input validation and memory safety practices in custom network protocol implementations to prevent similar vulnerabilities. 7. Educate network administrators about the risks of IPv6 protocol exploitation and encourage timely application of security updates. 8. Consider disabling IPv6 on systems where it is not required to reduce the attack surface.

Description

A vulnerability was found in libndp. This flaw allows a local malicious user to cause a buffer overflow in NetworkManager, triggered by sending a malformed IPv6 router advertisement packet. This issue occurred as libndp was not correctly validating the route length information.

Impact

The impact of CVE-2024-5564 is significant for organizations worldwide that use NetworkManager 1.0 with libndp on Linux systems, especially those utilizing IPv6 networking. Exploitation can lead to arbitrary code execution, allowing attackers to gain control over affected systems, potentially leading to data breaches, system manipulation, or persistent backdoors. The vulnerability also enables denial of service attacks by crashing NetworkManager or the host system, disrupting network connectivity and business operations. Since no authentication or user interaction is required, attackers can remotely target vulnerable systems over the network, increasing the attack surface. This poses a risk to enterprise servers, cloud infrastructure, IoT devices, and desktops that rely on NetworkManager for network configuration. Critical infrastructure and government networks using IPv6 are also at risk. The high CVSS score reflects the broad impact on confidentiality, integrity, and availability. Organizations with IPv6-enabled environments must consider this vulnerability a priority to avoid potential compromise or service disruption.

References

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