CVE-2024-40432VulnerabilityPublished 23 Oct 2024Updated 24 Oct 2024

CVE-2024-40432: n/a

Source CVE Database V5

Not known to be exploited · CVSS 6.5 Medium · fixed in 10.0.26100.21374 : update affected systems when convenient.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

6.5Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 33% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 10.0.26100.21374

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
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: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
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: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within 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 23 Oct 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

AI-suggested

To mitigate CVE-2024-40432, organizations should: 1) Monitor Realtek and device manufacturer channels for official patches or updated driver releases and apply them promptly once available. 2) Restrict local privileged access to trusted users only, minimizing the risk of exploitation by malicious insiders or compromised accounts. 3) Implement strict access control policies and audit privileged user activities to detect any attempts to exploit device drivers. 4) Employ endpoint protection solutions that can detect abnormal driver behavior or system crashes related to device IOCTL calls. 5) Consider disabling or restricting the use of SD card readers on critical systems where feasible, especially if they are not required for business operations. 6) Maintain regular backups and ensure rapid recovery procedures are in place to minimize downtime in case of a crash. 7) Educate system administrators about the vulnerability and the importance of cautious handling of privileged accounts and device drivers.

Description

A lack of input validation in Realtek SD card reader driver before 10.0.26100.21374 through the implementation of the IOCTL_SFFDISK_DEVICE_COMMAND control of the SD card reader driver allows a privileged attacker to crash the OS.

Impact

The primary impact of CVE-2024-40432 is a denial-of-service condition caused by an operating system crash. This can disrupt business operations, especially in environments where SD card readers are frequently used for data transfer or authentication purposes. Although the vulnerability does not compromise data confidentiality or integrity, the loss of availability can lead to productivity loss, potential data loss if unsaved work is interrupted, and increased support costs. In multi-user or shared environments, a malicious privileged user could exploit this flaw to disrupt other users’ sessions or critical system functions. The requirement for local privileged access limits the scope of exploitation but does not eliminate risk, as insider threats or compromised administrative accounts could leverage this vulnerability. Organizations relying on Realtek SD card readers in their hardware infrastructure may face operational disruptions until the vulnerability is remediated.

References

zwclose.github.io/2024/10/14/rtsper1.html (opens in a new tab)

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