CVE-2026-10641: Zephyr's Bluetooth Classic Hands-Free Profile (HFP) Hands-Free role parser (subsys/bluetooth/host/classic/hfp_

Q: How do I fix CVE-2026-10641?

zephyr: upgrade to 3.7.3, 4.3.1, 4.4.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-10641 being exploited?

CVE-2026-10641 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-10641 affect?

CVE-2026-10641 affects zephyr. Severity is high (CVSS 7.1). Zephyr's Bluetooth Classic Hands-Free Profile (HFP) Hands-Free role parser (subsys/bluetooth/host/classic/hfp_hf.c) contains an out-of-bounds write. During Service Level Connection setup the HF sends AT+CIND=? and parses the AG's +CIND: res

Q: How urgent is CVE-2026-10641?

Priority 35/100. High severity; Public exploit reference

Routine

HIGH 7.1UPGRADE

CVE-2026-10641 is a high-severity flaw (CVSS 7.1) affecting zephyr. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Zephyr's Bluetooth Classic Hands-Free Profile (HFP) Hands-Free role parser (subsys/bluetooth/host/classic/hfp_hf.c) contains an out-of-bounds write. During Service Level Connection setup the HF sends AT+CIND=? and parses the AG's +CIND: response in cind_handle(), which assigns a per-entry counter index and calls cind_handle_values() for each list element. cind_handle_values() then wrote hf->ind_table[index] = i without verifying that index is wit

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.1 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-06-17
Last modified	2026-10-25

Publisher (CNA): Zephyr Project · Vendor: zephyrproject

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-17 14:17 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

zephyrproject zephyr UPGRADE

Affected: >= 3.7.0 and < 3.7.3 · >= 4.0.0 and < 4.3.1 · >= 4.4.0 and < 4.4.2

Fixed in: 3.7.3, 4.3.1, 4.4.2

Safe to downgrade to: a release before 3.7.0

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-2026-10641?

zephyr: upgrade to 3.7.3, 4.3.1, 4.4.2. Exact commands for each OS are on this page.

Is CVE-2026-10641 being exploited?

CVE-2026-10641 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-2026-10641 affect?

CVE-2026-10641 affects zephyr. Severity is high (CVSS 7.1). Zephyr's Bluetooth Classic Hands-Free Profile (HFP) Hands-Free role parser (subsys/bluetooth/host/classic/hfp_hf.c) contains an out-of-bounds write. During Service Level Connection setup the HF sends AT+CIND=? and parses the AG's +CIND: res

How urgent is CVE-2026-10641?

Priority 35/100. High severity; Public exploit reference

Software pages

Bluetooth vulnerabilities

Related CVEs

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CVE-2026-10658 HIGH 7.1 UPGRADE bt_iso_recv() in subsys/bluetooth/host/iso.c pulled the ISO SDU header (4 bytes) or, when the timestamp flag i
CVE-2026-10636 LOW 3.7 UPGRADE In Zephyr's IPv4 IGMP implementation, igmp_send() in subsys/net/ip/igmp.c read the network interface back out
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References

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