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CVE-2023-34256

Public on 2023-05-31
Modified on 2024-01-14
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.

Severity
Medium
See what this means
CVSS v3 Base Score
4.0
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2023-06-21 19:11 ALAS-2023-1773
Amazon Linux 2 - Core kernel 2023-06-21 19:11 ALAS2-2023-2100
Amazon Linux 2 - Kernel-5.10 Extra kernel 2023-06-21 19:12 ALAS2KERNEL-5.10-2023-034
Amazon Linux 2 - Kernel-5.15 Extra kernel 2023-06-21 19:12 ALAS2KERNEL-5.15-2023-021
Amazon Linux 2 - Kernel-5.4 Extra kernel 2023-06-21 19:12 ALAS2KERNEL-5.4-2023-047
Amazon Linux 2023 kernel 2023-05-25 17:41 ALAS2023-2023-184

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 4.0 CVSSv3.1:AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD CVSSv3 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H