CVE-2023-34256 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Debian	Debian Linux
Linux	Linux Kernel
Suse	Linux Enterprise

Configuration 1 [-]

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

Configuration 2 [-]

OR	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::::::

Configuration 3 [-]

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

No data.

References

Link	Providers
https://bugzilla.suse.com/show_bug.cgi?id=1211895
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.3
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f04351888a83e595571de672e0a4a8b74f4fb31
https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
https://syzkaller.appspot.com/bug?extid=8785e41224a3afd04321

History

Tue, 11 Mar 2025 16:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2023-05-31T00:00:00.000Z

Updated: 2025-03-11T15:34:27.715Z

Reserved: 2023-05-31T00:00:00.000Z

Link: CVE-2023-34256

Vulnrichment

Updated: 2024-08-02T16:01:54.343Z

NVD

Status : Modified

Published: 2023-05-31T20:15:10.817

Modified: 2025-03-11T16:15:14.927

Link: CVE-2023-34256

Redhat

No data.

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