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Review reviewHigh

CVE-2023-52669

Linux Linux, linux kernel, debian linux

In the Linux kernel, the following vulnerability has been resolved: crypto: s390/aes - Fix buffer overread in CTR mode When processing the last block, the s390 ctr code will always read a whole block, even if there isn't a whole block of data left. Fix this by using the actual length left and copy it into a buffer first for processing.

CVSS
7.8
EPSS
0.68%
49.1% percentile
CISA KEV
Not listed
Published
2024.05.17
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.68%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: crypto: s390/aes - Fix buffer overread in CTR mode When processing the last block, the s390 ctr code will always read a whole block, even if there isn't a whole block of data left. Fix this by using the actual length left and copy it into a buffer first for processing.

Affected product and versions

Product
Linux Linux, linux kernel, debian linux
Affected versions
>= 0200f3ecc19660bebeabbcbaf212957fcf1dbf8f < cd51e26a3b89706beec64f2d8296cfb1c34e0c79, >= 0200f3ecc19660bebeabbcbaf212957fcf1dbf8f < a7f580cdb42ec3d53bbb7c4e4335a98423703285, >= 0200f3ecc19660bebeabbcbaf212957fcf1dbf8f < dbc9a791a70ea47be9f2acf251700fe254a2ab23, >= 0200f3ecc19660bebeabbcbaf212957fcf1dbf8f < d68ac38895e84446848b7647ab9458d54cacba3e, >= 0200f3ecc19660bebeabbcbaf212957fcf1dbf8f < e78f1a43e72daf77705ad5b9946de66fc708b874, >= 0200f3ecc19660bebeabbcbaf212957fcf1dbf8f < d07f951903fa9922c375b8ab1ce81b18a0034e3b, >= 3.0, >= 3.0 < 5.10.210, >= 5.11 < 5.15.149, >= 5.16 < 6.1.76, >= 6.2 < 6.6.15, >= 6.7 < 6.7.3, 10.0
Fixed versions
5.10.210, 5.15.149, 6.1.76, 6.6.15, 6.7.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel, debian linux 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-787
CVE-2023-52669 — Linux Linux, linux kernel, debian linux | SECUFOCUS NOW