CVE-2024-48981: An issue was discovered in MBed OS 6.16.0

Routine

HIGH 7.5REMOTEMITIGATE

CVE-2024-48981 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. During processing of HCI packets, the software dynamically determines the length of the packet header by looking up the identifying first byte and matching it against a table of possible lengths. The initial parsing function, hciTrSerialRxIncoming does not drop packets with invalid identifiers but also does not set a safe default for the length of unknown packets' headers, leading to a buffer overflow. T

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	0.4% (top 71%)
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 20:15 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-2024-48981?

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

Is CVE-2024-48981 being exploited?

CVE-2024-48981 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-2024-48981 affect?

CVE-2024-48981 affects mbed. Severity is high (CVSS 7.5). An issue was discovered in MBed OS 6.16.0. During processing of HCI packets, the software dynamically determines the length of the packet header by looking up the identifying first byte and matching it against a table of possible lengths. T

How urgent is CVE-2024-48981?

Priority 39/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-48986 HIGH 7.5 MITIGATE An issue was discovered in MBed OS 6.16.0
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

References

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