MEDIUM 5.5 Microsoft
CVE-2023-34256
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.
Microsoft Security Update 2023-May: 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 Products
- cm1 kernel 5.10.183.1-1 on CBL Mariner 1.0
- cbl2 kernel 5.15.116.1-1 on CBL Mariner 2.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-34256
- https://nvd.nist.gov/vuln/detail/CVE-2023-34256
This medium severity vulnerability with a CVSS score of 5.5 was published on 2023-05-09 via Microsoft. Affected: cm1 kernel 5.10.183.1-1 on CBL Mariner 1.0, cbl2 kernel 5.15.116.1-1 on CBL Mariner 2.0.
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