Kernel: tun: bugs for oversize packet when napi frags enabled in tun_napi_alloc_frags
CVE-2023-3812

7.8HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8.1 Update Services For SAP Solutions
Red Hat Enterprise Linux 8.2 Advanced Update Support
Red Hat Enterprise Linux 8.2 Telecommunications Update Service
Vendor
CVE Published:
24 July 2023

What is CVE-2023-3812?

An out-of-bounds memory access issue exists in the TUN/TAP device driver within the Linux kernel. This vulnerability allows a local user to exploit the generated networking packets that are excessively large when the 'napi frags' feature is enabled. If successfully exploited, this could lead to a system crash or potential escalation of privileges, compromising the system's overall security and integrity.

Affected Version(s)

Red Hat Enterprise Linux 8 0:4.18.0-513.9.1.rt7.311.el8_9

Red Hat Enterprise Linux 8 0:4.18.0-513.9.1.el8_9

Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions 0:4.18.0-147.94.1.el8_1

References

https://access.redhat.com/errata/RHSA-2023:6799
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:6813
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:7370
vendor-advisoryx_refsource_REDHAT

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.