Is there a public exploit for CVE-2026-87044?

No public exploit for CVE-2026-87044 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-87044?

CVE-2026-87044 scores CVSS 6.5 (v3.1), rated medium.

What does CVE-2026-87044 affect?

CVE-2026-87044 affects zephyrproject Zephyr.

6.5 Medium

The Mbed TLS crypto shim driver in drivers/crypto/cryptombedtlsshim.c drives PSA multipart cipher and AEAD operations.

CVE-2026-87044

The Mbed TLS crypto shim driver in drivers/crypto/cryptombedtlsshim.c drives PSA multipart cipher and AEAD operations. In mbedtlscbc() and mbedtlsaead(), every error path after a successful psacipherencryptsetup() / psaaeaddecryptsetup() returned directly without calling psacipherabort() / psaaeadabort(). Because the abort is the only thing that reaches mbedtlscipherfree(), each failed operation permanently leaked the heap-allocated mbedtlsaescontext (roughly 288 bytes) that setup had allocated from Mbed TLS's fixed static heap (mbedtlsheap[CONFIGMBEDTLSHEAPSIZE], default 512 bytes). With CONFIGPSACRYPTOPROVIDERTFM the leaked object is instead a finite secure-partition multipart-operation slot. The failure is chosen by an unauthenticated attacker. With CONFIGNETL2IEEE802154SECURITY backed by this driver, ieee802154decryptauth() in subsys/net/l2/ieee802154/ieee802154security.c invokes cipherccmop() on every received secured frame, with no authentication ahead of the MIC check. A device in radio range can transmit a stream of syntactically valid 802.15.4 frames carrying a bogus MIC; each one makes psaaeadverify() fail and leaks a block. The CBC path is reachable the same way through…

Assessment

CVSS: 6.5 (v3.1)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 4 November 2026
Last updated: 4 November 2026
Affected: zephyrproject · Zephyr
Assigner: zephyr

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

At the source

EUVD (ENISA)

References

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