CVE-2025-64096 CryptoLib vulnerable to Stack Buffer Overflow in Crypto_Key_Update due to missing TLV length check
A remote attacker can trigger a stack buffer overflow in CryptoLib via a spoofed TLV length, potentially leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-64096?
CVE-2025-64096 is a high-severity memory corruption vulnerability in nasa CryptoLib, published on 30 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between a spacecraft running the core Flight System (cFS) and a ground station. Prior to 1.4.2, there is a missing bounds check in Crypto_Key_update() (crypto_key_mgmt.c) which allows a remote attacker to trigger a stack-based buffer overflow by supplying a TLV packet with a spoofed length field. The function calculates the number of keys from an attacker-controlled field (pdu_len), which may exceed the static array size (kblk[98]), leading to an out-of-bounds write and potential memory corruption. This vulnerability is fixed in 1.4.2.
Weakness: CWE-121
Which versions are affected by CVE-2025-64096?
It affects 1 product.
Products include Nasa Cryptolib.
How do I fix CVE-2025-64096?
No fix has been published for CVE-2025-64096 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-64096 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-64096 exists.
Other vulnerabilities in nasa CryptoLib
- CVE-2025-30216 CryptoLib Has Heap Overflow in Crypto_TM_ProcessSecurity due to Unchecked Secondary Header Length
- CVE-2025-30356 Heap Buffer Overflow via Incomplete Length Check in `Crypto_TC_ApplySecurity`
- CVE-2025-29909 CryptoLib's Crypto_TC_ApplySecurity() Has a Heap Buffer Overflow Vulnerability
- CVE-2025-29911 CryptoLib Has Heap Buffer Overflow in Crypto_AOS_ProcessSecurity Function
- CVE-2025-29912 CryptoLib Has Heap Buffer Overflow Due to Unsigned Integer Underflow in Crypto_TC_ProcessSecurity
Sources
Also known as GHSA-w6c3-pxvr-6m6j.