How severe is CVE-2024-48986?

CVE-2024-48986 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-48986 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-48986?

CVE-2024-48986 affects Arm Mbed. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-48986?

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.

Does CVE-2024-48986 have an EU (EUVD) identifier?

Yes. CVE-2024-48986 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-43192.

When was CVE-2024-48986 published?

CVE-2024-48986 was published on 2024-11-20 and last updated on 2026-06-17.

CVE-2024-48986

CVE-2024-48986 is a high-severity vulnerability in Arm Mbed with a CVSS 3.x base score of 7.5. 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-120.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-43192
Weakness: CWE-120
Affected product: Arm Mbed
Published: 2024-11-20
Last modified: 2026-06-17

Description

An issue was discovered in MBed OS 6.16.0. Its hci parsing software dynamically determines the length of certain hci packets by reading a byte from its header. Certain events cause a callback, the logic for which allocates a buffer (the length of which is determined by looking up the event type in a table). The subsequent write operation, however, copies the amount of data specified in the packet header, which may lead to a buffer overflow. This bug is trivial to exploit for a denial of service but is not certain to suffice to bring the system down and can generally not be exploited further because the exploitable buffer is dynamically allocated.

Frequently asked questions

What is CVE-2024-48986?: An issue was discovered in MBed OS 6.16.0. Its hci parsing software dynamically determines the length of certain hci packets by reading a byte from its header. Certain events cause a callback, the logic for which allocates a buffer (the length of which is determined by looking up the event type in a table). The subsequent write operation, however, copies the amount of data specified in the packet header, which may lead to a buffer overflow. This bug is trivial to exploit for a denial of service but is not certain to suffice to bring the system down and can generally not be exploited further because the exploitable buffer is dynamically allocated.
How severe is CVE-2024-48986?: CVE-2024-48986 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-48986 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-48986?: CVE-2024-48986 affects Arm Mbed. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-48986?: 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.
Does CVE-2024-48986 have an EU (EUVD) identifier?: Yes. CVE-2024-48986 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-43192.
When was CVE-2024-48986 published?: CVE-2024-48986 was published on 2024-11-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:arm:mbed:6.16.0:*:*:*:*:*:*:*

More vulnerabilities in Arm Mbed

CVE-2024-48982 — High (CVSS 7.5): An issue was discovered in MBed OS 6.16.0. Its hci parsing software dynamically determines the length of certain hci…
CVE-2024-48985 — High (CVSS 7.5): An issue was discovered in MBed OS 6.16.0. During processing of HCI packets, the software dynamically determines the…
CVE-2024-48983 — High (CVSS 7.5): An issue was discovered in MBed OS 6.16.0. During processing of HCI packets, the software dynamically determines the…
CVE-2024-48981 — High (CVSS 7.5): An issue was discovered in MBed OS 6.16.0. During processing of HCI packets, the software dynamically determines the…
CVE-2021-27435 — High (CVSS 7.3): ARM mbed product Version 6.3.0 is vulnerable to integer wrap-around in malloc_wrapper function, which can lead to…

All CVEs affecting Arm Mbed →

Other CWE-120 (Classic Buffer Overflow) vulnerabilities

CVE-2025-48611 — Critical (CVSS 10.0): In DeviceId of DeviceId.java, there is a possible desync in persistence due to a missing bounds check. This could lead…
CVE-2026-24823 — Critical (CVSS 10.0): Out-of-bounds Write, Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in FASTSHIFT…
CVE-2026-24810 — Critical (CVSS 10.0): Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in rethinkdb (src/cjson modules).…
CVE-2026-24800 — Critical (CVSS 10.0): Out-of-bounds Write, Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in tildearrow…
CVE-2025-9962 — Critical (CVSS 10.0): A buffer overflow vulnerability in Novakon P series allows attackers to gain root permission without prior…
CVE-2010-10016 — Critical (CVSS 10.0): BS.Player version 2.57 (build 1051) contains a vulnerability in its playlist import functionality. When processing .m3u…

Browse all CWE-120 (Classic Buffer Overflow) vulnerabilities →