CVE-2023-34256: Medium severity Linux Linux kernel vulnerability
DISPUTED 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 ext4groupdesccsum 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 Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.223-1Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1Fixed in 6.12.27-1
Event History
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2023-34256.
What is the severity of CVE-2023-34256?
CVE-2023-34256 has a severity rating of 5.5 (medium).
Which software is affected by CVE-2023-34256?
Linux kernel versions before 6.3.3, Suse Linux Enterprise 12.0-sp5, Suse Linux Enterprise 15.0-sp4, and Suse Linux Enterprise 15.0-sp5 are affected by CVE-2023-34256.
What is the CWE-ID associated with CVE-2023-34256?
The CWE-ID associated with CVE-2023-34256 is CWE-125.
Are there any references available for CVE-2023-34256?
Yes, you can find references for CVE-2023-34256 at the following links: [link1](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f04351888a83e595571de672e0a4a8b74f4fb31), [link2](https://syzkaller.appspot.com/bug?extid=8785e41224a3afd04321), [link3](https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.3)