PRIOn knowledge basePRION:CVE-2023-34256Out-of-bounds
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.8 Medium
AI Score
Confidence
High
1.7 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:S/C:N/I:N/A:P
0.0004 Low
EPSS
Percentile
5.4%
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.
| CPE | Name | Operator | Version |
|---|---|---|---|
| debian_linux | eq | 10.0 | |
| linux_kernel | lt | 6.3.3 | |
| linux_enterprise | eq | 15.0 sp4 | |
| linux_enterprise | eq | 15.0 sp5 | |
| linux_enterprise | eq | 12.0 sp5 |
References
bugzilla.suse.com/show_bug.cgi?id=1211895
cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.3
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f04351888a83e595571de672e0a4a8b74f4fb31
lists.debian.org/debian-lts-announce/2023/07/msg00030.html
lists.debian.org/debian-lts-announce/2023/10/msg00027.html
syzkaller.appspot.com/bug?extid=8785e41224a3afd04321
Related
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.8 Medium
AI Score
Confidence
High
1.7 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:S/C:N/I:N/A:P
0.0004 Low
EPSS
Percentile
5.4%