CVE-2024-48986: An issue was discovered in MBed OS 6.16.0

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HIGH 7.5REMOTEMITIGATE

CVE-2024-48986 is a high-severity flaw (CVSS 7.5) affecting mbed. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-120
Published	2024-11-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: arm

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-11-20 21:15 UTCPublished CVE record published
2026-06-17 07:59 UTCUpdated Record last modified

arm mbed MITIGATE

Affected: 6.16.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.16.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-48986?

mbed: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-48986 being exploited?

CVE-2024-48986 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-48986 affect?

CVE-2024-48986 affects mbed. Severity is 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 packets by reading a byte from its header. Certain events cause a callback, the logic for which allocates a buffer (the len

How urgent is CVE-2024-48986?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-48985 HIGH 7.5 MITIGATE An issue was discovered in MBed OS 6.16.0
CVE-2024-48983 HIGH 7.5 MITIGATE An issue was discovered in MBed OS 6.16.0
CVE-2024-48982 HIGH 7.5 MITIGATE An issue was discovered in MBed OS 6.16.0
CVE-2024-48981 HIGH 7.5 MITIGATE An issue was discovered in MBed OS 6.16.0

References

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