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CVE-2023-34256 Details

Description

An issue was discovered in the Linux kernel before 6.3.3. There is an out-of-bounds read in crc16 in lib/crc16.c when called from fs/ext4/super.c because ext4_group_desc_csum does not properly check an offset. NOTE: this is disputed by third parties because the kernel is not intended to defend against attackers with the stated "When modifying the block device while it is mounted by the filesystem" access.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA: CISA-ADPCVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://bugzilla.suse.com/show_bug.cgi?id=1211895 CVEIssue TrackingPatchThird Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.3 CVEMailing ListPatch
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f04351888a83e595571de672e0a4a8b74f4fb31 CVEMailing ListPatch
https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html CVEMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html CVEMailing ListThird Party Advisory

see all 12 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-125Out-of-bounds Read[email protected]
CWE-125Out-of-bounds ReadCISA-ADP

Affected Products

ProductVersions
linux linux kernel
< 6.3.3

CPE

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
suse linux enterprise
12.0 sp5
15.0 sp4
15.0 sp5

CPE

  • cpe:2.3:o:suse:linux_enterprise:12.0:sp5:*:*:*:*:*:*
  • cpe:2.3:o:suse:linux_enterprise:15.0:sp4:*:*:*:*:*:*
  • cpe:2.3:o:suse:linux_enterprise:15.0:sp5:*:*:*:*:*:*

Remediation

  • No remediation found in references.
debian debian linux
10.0

CPE

  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

15 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2023-34256
NVD Published Date:
May 31, 2023
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2023-34256 Details - Not Deferred