CVEvulnerability

CVE-2023-34256

5.5 MEDIUM Published 2023-05-31 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2023-05-31
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-125

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.

Affected configurations

• linux linux kernel (< 6.3.3) • suse linux enterprise 12.0 • suse linux enterprise 15.0 • debian debian linux 10.0

Related

Weakness · CWE (1)

  • CWE-125 Out-of-bounds Read weakness

References