CVE-2024-6443
zephyr: out-of-bound read in utf8_trunc
In utf8_trunc in zephyr/lib/utils/utf8.c, last_byte_p can point to one byte before the string pointer if the string is empty.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
zephyr: out-of-bound read in utf8_trunc
In utf8_trunc in zephyr/lib/utils/utf8.c, last_byte_p can point to one byte before the string pointer if the string is empty.
- Record
CVE-2024-6443- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-125, CWE-787
- Updated
- 2026-11-02
EUVDEUVD-2024-47542
In utf8_trunc in zephyr/lib/utils/utf8.c, last_byte_p can point to one byte before the string pointer if the string is empty.
- Record
EUVD-2024-47542- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-03
NVD
In utf8_trunc in zephyr/lib/utils/utf8.c, last_byte_p can point to one byte before the string pointer if the string is empty.
- Record
CVE-2024-6443- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-125, CWE-787
- Updated
- 2026-11-02
OSV
zephyr: out-of-bound read in utf8_trunc
In utf8_trunc in zephyr/lib/utils/utf8.c, last_byte_p can point to one byte before the string pointer if the string is empty.
- Record
CVE-2024-6443- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-125, CWE-787
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2024-6443
In utf8_trunc in zephyr/lib/utils/utf8.c, last_byte_p can point to one byte before the string pointer if the string is empty.
- Record
UBUNTU-CVE-2024-6443- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
zephyrUbuntu:16.04:LTS |
All versions, plus listed versions 3.1.2-13.1.2-1build1 |
None known |
zephyrUbuntu:18.04:LTS |
All versions, plus listed versions 3.1.2-1build13.1.2-1build2 |
None known |
zephyrUbuntu:20.04:LTS |
All versions, plus listed versions 3.1.2-1build3 |
None known |
zephyrUbuntu:22.04:LTS |
All versions, plus listed versions 3.1.2-1build3 |
None known |
zephyrUbuntu:24.04:LTS |
All versions, plus listed versions 3.1.2-1.13.1.2-1.1build1 |
None known |
zephyrUbuntu:25.10 |
All versions, plus listed versions 3.1.2-1.1build1 |
None known |
zephyrUbuntu:26.10 |
All versions, plus listed versions 3.1.2-4 |
None known |
zephyrUbuntu:26.04:LTS |
All versions, plus listed versions 3.1.2-1.1build13.1.2-4 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-6443 is a medium vulnerability (CVSS 6.3) in Zephyrproject Zephyr, published October 4, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.61%, the 49th percentile. No source names a fixed version.