Out-of-bounds read in coredump shell when printing stored-dump target code

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-10684
StatePUBLISHED
Assignerzephyr
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-29 19:16:43 UTC
Updated2026-07-29 19:16:43 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 3 LOW from [email protected]

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

Problem Types: CWE-125 | CWE-125 bounds

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3LOWCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:L
3.1CNACVSS3LOWCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
Low

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Zephyrproject Zephyr affected 4.2.0 4.3.1 semver Not specified
CNA Zephyrproject Zephyr affected 4.4.0 4.4.1 semver Not specified

References

ReferenceSourceLinkTags
github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-9fw2-4429-... [email protected] github.com
github.com/zephyrproject-rtos/zephyr/commit/a9226324e8bd1f8adecafb1b6e06... [email protected] github.com
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