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Review reviewHigh

CVE-2024-27061

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: crypto: sun8i-ce - Fix use after free in unprepare sun8i_ce_cipher_unprepare should be called before crypto_finalize_skcipher_request, because client callbacks may immediately free memory, that isn't needed anymore. But it will be used by unprepare after free. Before removing prepare/unprepare callbacks it was handled by crypto engine in crypto_finalize_request. Usually that results in a pointer dereference problem during a in crypto selftest. Unable to handle kernel NULL pointer dereference at virtual address 0000000000000...

CVSS
7.8
EPSS
0.23%
13.4% percentile
CISA KEV
Not listed
Published
2024.05.01
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.23%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: crypto: sun8i-ce - Fix use after free in unprepare sun8i_ce_cipher_unprepare should be called before crypto_finalize_skcipher_request, because client callbacks may immediately free memory, that isn't needed anymore. But it will be used by unprepare after free. Before removing prepare/unprepare callbacks it was handled by crypto engine in crypto_finalize_request. Usually that results in a pointer dereference problem during a in crypto selftest. Unable to handle kernel NULL pointer dereference at virtual address 0000000000000...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 4136212ab18eb3dce6efb6e18108765c36708f71 < dc60b25540c82fc4baa95d1458ae96ead21859e0, >= 4136212ab18eb3dce6efb6e18108765c36708f71 < 51a7d338c212e0640b1aca52ba6590d5bea49879, >= 4136212ab18eb3dce6efb6e18108765c36708f71 < 183420038444547c149a0fc5f58e792c2752860c, >= 6.6, >= 6.6 < 6.6.24, >= 6.7 < 6.7.12, 6.8
Fixed versions
6.6.24, 6.7.12

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, CWE-476