CVE-2023-54046
Unknown Unknown - Not Provided

Use-After-Free in Linux Kernel ESSIV Crypto Handling EBUSY

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: crypto: essiv - Handle EBUSY correctly As it is essiv only handles the special return value of EINPROGERSS, which means that in all other cases it will free data related to the request. However, as the caller of essiv may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free.

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Meta Information

Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-07-06
AI Q&A
2025-12-24
EPSS Evaluated
2026-07-05
NVD
CVE-2023-54046
EUVD
EUVD-2023-60280

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is in the Linux kernel's crypto essiv module. The essiv function only handled the special return value EINPROGRESS correctly, freeing data related to the request in other cases. However, it did not properly handle the EBUSY return value, which can occur when the caller specifies MAY_BACKLOG. This improper handling can lead to a use-after-free condition when backlogged requests trigger EBUSY but are not treated correctly.

Impact Analysis

The vulnerability can lead to a use-after-free condition in the Linux kernel's crypto essiv module. Use-after-free bugs can cause system instability, crashes, or potentially allow an attacker to execute arbitrary code or escalate privileges, depending on the context and exploitability.

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