SECUFOCUSNOW
Home›CVE index›CVE-2023-53536
Review reviewHigh

CVE-2023-53536

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: blk-crypto: make blk_crypto_evict_key() more robust If blk_crypto_evict_key() sees that the key is still in-use (due to a bug) or that ->keyslot_evict failed, it currently just returns while leaving the key linked into the keyslot management structures. However, blk_crypto_evict_key() is only called in contexts such as inode eviction where failure is not an option. So actually the caller proceeds with freeing the blk_crypto_key regardless of the return value of blk_crypto_evict_key(). These two assumptions don't match, and...

CVSS
7.8
EPSS
0.15%
4.61% percentile
CISA KEV
Not listed
Published
2025.10.05
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.15%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: blk-crypto: make blk_crypto_evict_key() more robust If blk_crypto_evict_key() sees that the key is still in-use (due to a bug) or that ->keyslot_evict failed, it currently just returns while leaving the key linked into the keyslot management structures. However, blk_crypto_evict_key() is only called in contexts such as inode eviction where failure is not an option. So actually the caller proceeds with freeing the blk_crypto_key regardless of the return value of blk_crypto_evict_key(). These two assumptions don't match, and...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 1b2628397058ebce7277480960b29c788138de90 < 701a8220762ff90615dc91d3543f789391b63298, >= 1b2628397058ebce7277480960b29c788138de90 < 5bb4005fb667c6e2188fa87950f8d5faf2994410, >= 1b2628397058ebce7277480960b29c788138de90 < 64ef787bb1588475163069c2e62fdd8f6c27b1f6, >= 1b2628397058ebce7277480960b29c788138de90 < 809a5be62e92a444a3c3d7b9f438019d0b322f55, >= 1b2628397058ebce7277480960b29c788138de90 < 5c62852942667c613de0458fc797c5b8c36112b5, >= 1b2628397058ebce7277480960b29c788138de90 < 5c7cb94452901a93e90c2230632e2c12a681bc92, >= 5.8, >= 5.8 < 5.10.180, >= 5.11 < 5.15.111, >= 5.16 < 6.1.28, >= 6.2 < 6.2.15, >= 6.3 < 6.3.2
Fixed versions
5.10.180, 5.15.111, 6.1.28, 6.2.15, 6.3.2

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
CVE-2023-53536 — Linux Linux, linux kernel | SECUFOCUS NOW