What’s Vulnerable › Vulnerabilities

CVE-2026-80924: crypto: krb5 - use kfree_sensitive() for derived key buffers

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-09 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: krb5 - use kfree_sensitive() for derived key buffers crypto_krb5_prepare_encryption() and crypto_krb5_prepare_checksum() free the buffer holding the freshly derived keys with plain kfree(), leaving the key material behind in the freed slab object.

Affected products

• Linux kernel: 6.15 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/731a5b6fb4c1705f9405d9029dd64ea81e336207
• https://git.kernel.org/stable/c/91b96dc9cc250cd16751f53de525cf3442ca0962
• https://git.kernel.org/stable/c/a1bf79365794783b19f5b09e8a23f7ee311e8931
• https://git.kernel.org/stable/c/f7d53dd3f267e46a784f219a75072f2f400d42b9

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