What’s Vulnerable › Vulnerabilities

CVE-2023-53799: crypto: api - Use work queue in crypto_destroy_instance

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-09 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: api - Use work queue in crypto_destroy_instance The function crypto_drop_spawn expects to be called in process context. However, when an instance is unregistered while it still has active users, the last user may cause the instance to be freed in atomic context. Fix this by delaying the freeing to a work queue.

Affected products

• Linux kernel: 2.6.19 — fixed in 6.6

How to fix

Upgrade to a fixed version: Linux kernel 6.6. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/048545d9fc6424b0a11e7e8771225bb9afe09422
• https://git.kernel.org/stable/c/625bf86bf53eb7a8ee60fb9dc45b272b77e5ce1c
• https://git.kernel.org/stable/c/867a146690960ac7b89ce40f4ee60dd32eeb1682
• https://git.kernel.org/stable/c/9ae4577bc077a7e32c3c7d442c95bc76865c0f17
• https://git.kernel.org/stable/c/c0dbcebc7f390ec7dbe010dcc22c60f0c6bfc26d
• https://git.kernel.org/stable/c/c4cb61c5f976183c07d16b0071f0c60bc212ef1f

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