How severe is CVE-2018-11840?

CVE-2018-11840 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-11840 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-11840?

CVE-2018-11840 affects Google Android. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-11840?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-11840 published?

CVE-2018-11840 was published on 2018-09-18 and last updated on 2026-06-17.

CVE-2018-11840

CVE-2018-11840 is a high-severity vulnerability in Google Android with a CVSS 3.x base score of 7.8. 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-415.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-415
Affected product: Google Android
Published: 2018-09-18
Last modified: 2026-06-17

Description

In all android releases (Android for MSM, Firefox OS for MSM, QRD Android) from CAF using the linux kernel, while processing the WLAN driver command ioctl a temporary buffer used to construct the reply message may be freed twice.

Frequently asked questions

What is CVE-2018-11840?: In all android releases (Android for MSM, Firefox OS for MSM, QRD Android) from CAF using the linux kernel, while processing the WLAN driver command ioctl a temporary buffer used to construct the reply message may be freed twice.
How severe is CVE-2018-11840?: CVE-2018-11840 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-11840 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-11840?: CVE-2018-11840 affects Google Android. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-11840?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-11840 published?: CVE-2018-11840 was published on 2018-09-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:google:android:-:*:*:*:*:*:*:*

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