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Review reviewHigh

CVE-2023-53494

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: crypto: xts - Handle EBUSY correctly As it is xts only handles the special return value of EINPROGRESS, which means that in all other cases it will free data related to the request. However, as the caller of xts 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.

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2025.10.01
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: crypto: xts - Handle EBUSY correctly As it is xts only handles the special return value of EINPROGRESS, which means that in all other cases it will free data related to the request. However, as the caller of xts 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.

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 8083b1bf8163e7ae7d8c90f221106d96450b8aa8 < 92a07ba4f0af2cccdc2aa5ee32679c9c9714db90, >= 8083b1bf8163e7ae7d8c90f221106d96450b8aa8 < 912eb10b65646ffd222256c78a1c566a3dac177d, >= 8083b1bf8163e7ae7d8c90f221106d96450b8aa8 < 57c3e1d63b63dc0841d41df729297cd7c1c35808, >= 8083b1bf8163e7ae7d8c90f221106d96450b8aa8 < d5870848879291700fe6c5257dcb48aadd10425c, >= 8083b1bf8163e7ae7d8c90f221106d96450b8aa8 < 51c082514c2dedf2711c99d93c196cc4eedceb40, >= 5.4, >= 5.4 < 5.10.173, >= 5.11 < 5.15.99, >= 5.16 < 6.1.16, >= 6.2 < 6.2.3
Fixed versions
5.10.173, 5.15.99, 6.1.16, 6.2.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416