🛡️ CVE-2023-34256
🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-125 NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE CWE-125
Public Exploit ✅ No
Source NVD
Published 2023-05-31
Updated 2026-06-08
Modified 2025-03-11

Affected Packages

Software From version Fixed in
debian-linux
linux-enterprise
linux-kernel 6.3.3

References

Issue Tracking, Patch, Third Party Advisory https://bugzilla.suse.com/show_bug.cgi?id=1211895
Issue Tracking, Patch, Third Party Advisory https://bugzilla.suse.com/show_bug.cgi?id=1211895

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