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CVE-2026-10684— Out-of-bounds read in coredump shell when printing stored-dump target code

Quick assessment

Affected
zephyrproject zephyr
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

zephyrproject zephyr是zephyrproject组织开源的一款实时操作系统内核。 Zephyr Project zephyr 4.2.0版本至4.3.1之前版本和4.4.0版本至4.4.1及之前版本存在缓冲区错误漏洞，该漏洞源于print_coredump_hdr()函数直接使用存储的16位tgt_code字段作为索引访问固定7元素数组，没有边界检查，可能导致设备内存内容泄露或崩溃。

CVSS 3.0 · Low EPSS 0.14% · P3

Affected Version Matrix 2

VendorProduct Version RangeStatus
zephyrproject zephyr 4.2.0< 4.3.1 affected
4.4.0< 4.4.2 affected
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I. Basic Information for CVE-2026-10684

Vulnerability Information
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Vulnerability Title
Out-of-bounds read in coredump shell when printing stored-dump target code
Source: CVE Program / CVE List V5
Vulnerability Description
In subsys/debug/coredump/coredump_shell.c, print_coredump_hdr() used the 16-bit tgt_code field of a stored Zephyr coredump header directly as an index into coredump_target_code2str[], a fixed 7-element array of string pointers, with no bounds check. A stored coredump whose tgt_code is >= 7 causes an out-of-bounds read of a char* up to ~64K entries past the array; that value is passed as the %s argument to shell_print, which dereferences and walks it as a string. The result is either disclosure of device memory contents to the shell user or a crash when the out-of-bounds pointer is unmapped. The defect is reached via the coredump print shell command (cmd_coredump_print_stored_dump -> pretty_print_coredump -> parse_and_print_coredump -> print_coredump_hdr). The tgt_code field is device-generated and in-range during normal crash handling, so triggering requires local shell access plus the ability to stage or corrupt the stored coredump in the flash/in-memory backend. Introduced in v4.2.0 (commit 13abd7fe730) and present through v4.4.0; fixed by clamping out-of-range codes to the 'unknown' (index 0) entry.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Zephyr Project zephyr 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
zephyrproject zephyr是zephyrproject组织开源的一款实时操作系统内核。 Zephyr Project zephyr 4.2.0版本至4.3.1之前版本和4.4.0版本至4.4.1及之前版本存在缓冲区错误漏洞，该漏洞源于print_coredump_hdr()函数直接使用存储的16位tgt_code字段作为索引访问固定7元素数组，没有边界检查，可能导致设备内存内容泄露或崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
zephyrproject zephyr 4.2.0 ~ 4.3.1 -

II. Public POCs for CVE-2026-10684

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III. Intelligence Information for CVE-2026-10684

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Patches & Fixes for CVE-2026-10684 (1)

Vendor Advisories for CVE-2026-10684 (1)

IV. Related Vulnerabilities

Same product: zephyr
Same vendor: zephyrproject
Same weakness: CWE-125

V. Comments for CVE-2026-10684

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