medium5.5
CVE-2023-34256
An issue was discovered in the Linux kernel before 6.3.3.
Impact
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
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | before 6.3.3 |
| Suse | Linux Enterprise | Versions 12.0, 15.0 |
| Debian | Debian Linux | Version 10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://bugzilla.suse.com/show_bug.cgi?id=1211895
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.3
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f04351888a83e595571de672e0a4a8b74f4fb31
- https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- https://syzkaller.appspot.com/bug?extid=8785e41224a3afd04321
- https://bugzilla.suse.com/show_bug.cgi?id=1211895
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.3
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f04351888a83e595571de672e0a4a8b74f4fb31
- https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- https://syzkaller.appspot.com/bug?extid=8785e41224a3afd04321