High severity · published Jul 24, 2023
CVE-2023-3812
Kernel: tun: bugs for oversize packet when napi frags enabled in tun_napi_alloc_frags
7.8
CVSS
0.3%
EPSS
No
On KEV
Description
An out-of-bounds memory access flaw was found in the Linux kernel’s TUN/TAP device driver functionality in how a user generates a malicious (too big) networking packet when napi frags is enabled. This flaw allows a local user to crash or potentially escalate their privileges on the system.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
4.15 before 4.19.265; 4.20 before 5.4.224; 5.5 before 5.10.154; 5.11 before 5.15.78; 5.16 before 6.0.8 · source: NVD
RH
Red Hat Enterprise Linux 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8.2 Advanced Update Support · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8.2 Telecommunications Update Service · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8.4 Telecommunications Update Service · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8.6 Extended Update Support · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8.8 Extended Update Support · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9 · Red Hat
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-3812
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-3812
Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:6799
Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:6813
Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:7370
Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:7379
Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:7382
Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:7389
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