Debian/libcoap3: critical 9.8
libcoap contains out-of-bounds read vulnerabilities in OSCORE Appendix B.2 CBOR unwrap handling where get_byte_inc() in src/oscore/oscore_cbor.c relies solely on assert() for bounds checking, which is
Action: Upgrade libcoap3 to 4.3.5-3 or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 4.3.5-3 | - |
Fixed versions
| 4.3.5-3 |
Sources
- osv: DEBIAN-CVE-2026-29013#Debian:14/libcoap3
- https://security-tracker.debian.org/tracker/CVE-2026-29013
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