ReviewHigh

CVE-2024-0565

Linux kernel, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.6 Extended Update Support

An out-of-bounds memory read flaw was found in receive_encrypted_standard in fs/smb/client/smb2ops.c in the SMB Client sub-component in the Linux Kernel. This issue occurs due to integer underflow on the memcpy length, leading to a denial of service.

CVSS
7.4
EPSS
2.00%
79.4% percentile
CISA KEV
Not listed
Published
2024.01.16
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability2.00%
Technical severityCVSS 7.4

Vulnerability overview

An out-of-bounds memory read flaw was found in receive_encrypted_standard in fs/smb/client/smb2ops.c in the SMB Client sub-component in the Linux Kernel. This issue occurs due to integer underflow on the memcpy length, leading to a denial of service.

Affected product and versions

Product
Linux kernel, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.6 Extended Update Support
Affected versions
>= 4.19 < 5.10.211, >= 5.11 < 5.15.150, >= 5.16 < 6.1.69, >= 6.2 < 6.6.8, >= 6.1.36 < 6.7, 6.7
Fixed versions
6.7

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux kernel, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.6 Extended Update Support 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:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CWE
CWE-191