High severity · published Sep 20, 2023
CVE-2023-2163
Incorrect Verifier Branch Pruning Logic Leads To Arbitrary Read/Write In Linux Kernel and Lateral Privilege Escalation
8.8
CVSS
3.6%
EPSS
No
On KEV
Description
Incorrect verifier pruning in BPF in Linux Kernel >=5.4 leads to unsafe
code paths being incorrectly marked as safe, resulting in arbitrary read/write in
kernel memory, lateral privilege escalation, and container escape.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)3.6% · higher than 90% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
before 71b547f561247897a0a14f3082730156c0533fed · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-2163
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-2163
Mailing List
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=71b547f561247897a0a14f3082730156c0533fed
bughunters.google.com
https://bughunters.google.com/blog/6303226026131456/a-deep-dive-into-cve-2023-2163-how-we-found-and-fixed-an-ebpf-linux-kernel-vulnerability
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