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.
                
            Metrics
Affected Vendors & Products
Advisories
    | Source | ID | Title | 
|---|---|---|
|  Debian DLA | DLA-3508-1 | linux security update | 
|  Debian DLA | DLA-3623-1 | linux-5.10 security update | 
|  Ubuntu USN | USN-6700-1 | Linux kernel vulnerabilities | 
|  Ubuntu USN | USN-6700-2 | Linux kernel (AWS) vulnerabilities | 
|  Ubuntu USN | USN-6701-1 | Linux kernel vulnerabilities | 
|  Ubuntu USN | USN-6701-2 | Linux kernel (GCP) vulnerabilities | 
|  Ubuntu USN | USN-6701-3 | Linux kernel vulnerabilities | 
|  Ubuntu USN | USN-6701-4 | Linux kernel (Azure) vulnerabilities | 
Fixes
    Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
        History
                    Tue, 11 Mar 2025 16:15:00 +0000
| Type | Values Removed | Values Added | 
|---|---|---|
| Metrics | ssvc 
 | 
 MITRE
                        MITRE
                    Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2025-03-11T15:34:27.715Z
Reserved: 2023-05-31T00:00:00.000Z
Link: CVE-2023-34256
 Vulnrichment
                        Vulnrichment
                    Updated: 2024-08-02T16:01:54.343Z
 NVD
                        NVD
                    Status : Modified
Published: 2023-05-31T20:15:10.817
Modified: 2025-03-11T16:15:14.927
Link: CVE-2023-34256
 Redhat
                        Redhat
                    No data.
 OpenCVE Enrichment
                        OpenCVE Enrichment
                    No data.