CVE-2023-34256
Medium
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.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedMay 31, 2023
First seenMay 31, 2023
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- linux linux_kernel6.3.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v < 6.3.3 | 6.3.3 |
| suse linux_enterprise | 12.0, 15.0 | — |
| debian debian_linux | 10.0 | — |
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