What’s Vulnerable › Vulnerabilities

CVE-2024-50215: nvmet-auth: assign dh_key to NULL after kfree_sensitive

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-11-09 · updated 2026-08-04
• Weakness: CWE-415

Description

In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: assign dh_key to NULL after kfree_sensitive ctrl->dh_key might be used across multiple calls to nvmet_setup_dhgroup() for the same controller. So it's better to nullify it after release on error path in order to avoid double free later in nvmet_destroy_auth(). Found by Linux Verification Center (linuxtesting.org) with Svace.

Affected products

• Linux kernel: from 6.0 before 6.1.116; from 6.2 before 6.6.60; from 6.7 before 6.11.7; 6.12-rc1, 6.12-rc2, 6.12-rc3, 6.12-rc4, 6.12-rc5 — fixed in 6.1.116, 6.11.7, 6.6.60

How to fix

Upgrade to a fixed version: Linux kernel 6.1.116, 6.11.7, 6.6.60. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/c60af16e1d6cc2237d58336546d6adfc067b6b8f
• https://git.kernel.org/stable/c/c94e965f766321641ec38e4eece9ce8884543244
• https://git.kernel.org/stable/c/d2f551b1f72b4c508ab9298419f6feadc3b5d791
• https://git.kernel.org/stable/c/e61bd51e44409495d75847e9230736593e4c8710
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

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