CVE-2026-46291 crypto: caam - guard HMAC key hex dumps in hash_digest_key
Attackers can leak sensitive HMAC key bytes from the Linux kernel CAAM driver if dynamic debug is enabled, exposing cryptographic secrets.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46291?
CVE-2026-46291 is a medium-severity vulnerability in Linux kernel, published on 8 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
crypto: caam - guard HMAC key hex dumps in hash_digest_key
Use print_hex_dump_devel() for dumping sensitive HMAC key bytes in hash_digest_key() to avoid leaking secrets at runtime when CONFIG_DYNAMIC_DEBUG is enabled.
Which versions are affected by CVE-2026-46291?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46291?
Apply the vendor's patch.
Is CVE-2026-46291 being exploited?
There is no known exploitation of CVE-2026-46291 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-89633, BELL-CVE-2026-46291, DEBIAN-CVE-2026-46291, GHSA-66f6-qxv2-c6gr, ROOT-OS-DEBIAN-11-CVE-2026-46291, ROOT-OS-DEBIAN-12-CVE-2026-46291 and 1 more.