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Description

Golioth Pouch version 0.1.0, prior to commit 1b2219a1, contains a heap-based buffer overflow in BLE GATT server certificate handling. server_cert_write() allocates a heap buffer of size CONFIG_POUCH_SERVER_CERT_MAX_LEN when receiving the first fragment, then appends subsequent fragments using memcpy() without verifying that sufficient capacity remains. An adjacent BLE client can send unauthenticated fragments whose combined size exceeds the allocated buffer, causing a heap overflow and crash; integrity impact is also possible due to memory corruption.

PUBLISHED Reserved 2026-01-15 | Published 2026-02-26 | Updated 2026-02-26 | Assigner VulnCheck




HIGH: 7.2CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

HIGH: 8.1CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Problem types

CWE-122 Heap-based Buffer Overflow

Product status

Default status
unaffected

0.1.0 (semver)
affected

commit 1b2219a1
unaffected

Credits

SecMate (https://secmate.dev) finder

References

secmate.dev/disclosures/SECMATE-2025-0018 technical-description

github.com/golioth/pouch/commit/1b2219a1 patch

www.vulncheck.com/...uch-ble-gatt-heap-based-buffer-overflow third-party-advisory

cve.org (CVE-2026-23750)

nvd.nist.gov (CVE-2026-23750)

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