How severe is CVE-2023-6249?

CVE-2023-6249 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability high.

Is CVE-2023-6249 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-6249?

CVE-2023-6249 primarily affects Zephyrproject Zephyr. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-6249?

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-2023-6249 have an EU (EUVD) identifier?

Yes. CVE-2023-6249 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-58494.

When was CVE-2023-6249 published?

CVE-2023-6249 was published on 2024-02-18 and last updated on 2026-06-17.

CVE-2023-6249

CVE-2023-6249 is a high-severity vulnerability in Zephyrproject Zephyr with a CVSS 3.x base score of 8.0. 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-704.

Key facts

Severity: High (CVSS 3.x base score 8.0)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-58494
Weakness: CWE-704
Affected product: Zephyrproject Zephyr
Published: 2024-02-18
Last modified: 2026-06-17

Description

Signed to unsigned conversion esp32_ipm_send

Frequently asked questions

What is CVE-2023-6249?: Signed to unsigned conversion esp32_ipm_send
How severe is CVE-2023-6249?: CVE-2023-6249 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability high.
Is CVE-2023-6249 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-6249?: CVE-2023-6249 primarily affects Zephyrproject Zephyr. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-6249?: 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-2023-6249 have an EU (EUVD) identifier?: Yes. CVE-2023-6249 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-58494.
When was CVE-2023-6249 published?: CVE-2023-6249 was published on 2024-02-18 and last updated on 2026-06-17.

References

https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-32f5-3p9h-2rqc

Affected products (5)

cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*
cpe:2.3:o:zephyrproject:zephyr:3.5.0:-:*:*:*:*:*:*
cpe:2.3:o:zephyrproject:zephyr:3.5.0:rc1:*:*:*:*:*:*
cpe:2.3:o:zephyrproject:zephyr:3.5.0:rc2:*:*:*:*:*:*
cpe:2.3:o:zephyrproject:zephyr:3.5.0:rc3:*:*:*:*:*:*

More vulnerabilities in Zephyrproject Zephyr

CVE-2026-5067 — Critical (CVSS 9.8): A remote, unauthenticated attacker can trigger memory corruption in Zephyr's HTTP server WebSocket upgrade path by…
CVE-2022-3806 — Critical (CVSS 9.8): Inconsistent handling of error cases in bluetooth hci may lead to a double free condition of a network buffer.
CVE-2017-14199 — Critical (CVSS 9.8): A buffer overflow has been found in the Zephyr Project's getaddrinfo() implementation in 1.9.0 and 1.10.0.
CVE-2018-1000800 — Critical (CVSS 9.8): zephyr-rtos version 1.12.0 contains a NULL base pointer reference vulnerability in sys_ring_buf_put(),…
CVE-2021-3329 — Critical (CVSS 9.6): Lack of proper validation in HCI Host stack initialization can cause a crash of the bluetooth stack
CVE-2023-0397 — Critical (CVSS 9.6): A malicious / defect bluetooth controller can cause a Denial of Service due to unchecked input in…

All CVEs affecting Zephyrproject Zephyr →

Other CWE-704 (Incorrect Type Conversion or Cast) vulnerabilities

CVE-2015-3120 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.302 and 14.x through 18.x before 18.0.0.203 on Windows and OS X and before…
CVE-2025-41648 — Critical (CVSS 9.8): An unauthenticated remote attacker can bypass the login to the web application of the affected devices making it…
CVE-2025-41646 — Critical (CVSS 9.8): An unauthorized remote attacker can bypass the authentication of the affected software package by misusing an incorrect…
CVE-2021-33318 — Critical (CVSS 9.8): An Input Validation Vulnerability exists in Joel Christner .NET C# packages WatsonWebserver, IpMatcher 1.0.4.1 and…
CVE-2020-25576 — Critical (CVSS 9.8): An issue was discovered in the rand_core crate before 0.4.2 for Rust. Casting of byte slices to integer slices…
CVE-2020-6151 — Critical (CVSS 9.8): A memory corruption vulnerability exists in the TIFF handle_COMPRESSION_PACKBITS functionality of Accusoft ImageGear…

Browse all CWE-704 (Incorrect Type Conversion or Cast) vulnerabilities →