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Vulnerability record · CVE-2023-4260 · published 27 September 2023

CVE-2023-4260: Zephyrproject zephyr classic buffer overflow vulnerability

Zephyrproject · Zephyr

Potential off-by-one buffer overflow vulnerability in the Zephyr fuse file system.

10.0 CVSS 3.1 Critical EPSS 0.77% · top 46.1% CWE-120 · Classic buffer overflowCWE-193 · CWE-193
10.0CVSS 3.1 base score
0.77%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Potential off-by-one buffer overflow vulnerability in the Zephyr fuse file system.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/175657/Zephyr-RTOS-3.x.0-Buffer-Overflows.html Third Party Advisory
http://seclists.org/fulldisclosure/2023/Nov/1 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/11/07/1 Mailing List
https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-gj27-862r-55wh ExploitVendor Advisory
http://packetstormsecurity.com/files/175657/Zephyr-RTOS-3.x.0-Buffer-Overflows.html Third Party Advisory
http://seclists.org/fulldisclosure/2023/Nov/1 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/11/07/1 Mailing List
https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-gj27-862r-55wh ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-10666Zephyrproject zephyr stack-based buffer overflow vulnerabilityparse_ipv4() in subsys/net/ip/utils.c (reached via net_ipaddr_parse() for strings of the form "a.b.c.d:port") copies the port substring into a fixed …EPSS 0.65%9.8CVE-2026-5067Zephyrproject zephyr out-of-bounds write vulnerabilityA remote, unauthenticated attacker can trigger memory corruption in Zephyr's HTTP server WebSocket upgrade path by sending a crafted Sec-WebSocket-Ke…EPSS 0.87%9.8CVE-2026-1678Zephyrproject zephyr out-of-bounds write vulnerabilitydns_unpack_name() caches the buffer tailroom once and reuses it while appending DNS labels. As the buffer grows, the cached size becomes incorrect, a…EPSS 0.38%9.8CVE-2023-6881Zephyrproject zephyr classic buffer overflow vulnerabilityPossible buffer overflow in is_mount_pointEPSS 0.44%9.8CVE-2023-6249Zephyrproject zephyr vulnerabilitySigned to unsigned conversion esp32_ipm_sendEPSS 0.44%9.8CVE-2023-5779Zephyrproject zephyr out-of-bounds write vulnerabilitycan: out of bounds in remove_rx_filter functionEPSS 0.44%9.8CVE-2023-6749Zephyrproject zephyr stack-based buffer overflow vulnerabilityUnchecked length coming from user input in settings shellEPSS 0.44%9.8CVE-2023-5055Zephyrproject zephyr stack-based buffer overflow vulnerabilityPossible variant of CVE-2021-3434 in function le_ecred_reconf_req.EPSS 0.75%

Source: NIST National Vulnerability Database (record CVE-2023-4260), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.