Buffer overflow in Linux Kernel
CVE-2023-42753
An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the `h->nets` array offset, providing attackers with the primitive to arbitrarily increment/decrement a memory buffer out-of-bound. This issue may allow a local user to crash the system or potentially escalate their privileges on the system.
Vulnerability class: Buffer Overflow
EPSS: 0.005 (40.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux Linux_kernel
- Debian Debian_linux — versions 10.0
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7 — versions 0:3.10.0-1160.108.1.rt56.1259.el7, 0:3.10.0-1160.108.1.el7
- Red Hat Enterprise Linux 7.7 Advanced Update Support — versions 0:3.10.0-1062.85.1.el7
- Red Hat Enterprise Linux 8 — versions 0:4.18.0-513.11.1.rt7.313.el8_9, 0:4.18.0-513.11.1.el8_9
- Red Hat Enterprise Linux 8.2 Advanced Update Support — versions 0:4.18.0-193.120.1.el8_2
- Red Hat Enterprise Linux 8.2 Telecommunications Update Service — versions 0:4.18.0-193.120.1.rt13.171.el8_2, 0:4.18.0-193.120.1.el8_2
- Red Hat Enterprise Linux 8.2 Update Services For Sap Solutions — versions 0:4.18.0-193.120.1.el8_2
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support — versions 0:4.18.0-305.120.1.el8_4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-42753?
- CVE-2023-42753 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 7.0/10. Published 2023-09-25.
- How severe is CVE-2023-42753?
- High severity. CVSS v3 base score is 7.0 out of 10.
- Is CVE-2023-42753 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.