CVE-2023-42754
Kernel: ipv4: null pointer dereference in ipv4_send_dest_unreach()
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
A NULL pointer dereference flaw was found in the Linux kernel ipv4 stack. The socket buffer (skb) was assumed to be associated with a device before calling __ip_options_compile, which is not always the case if the skb is re-routed by ipvs. This issue may allow a local user with CAP_NET_ADMIN privileges to crash the system.
| CWE | CWE-476 |
| Vendor | red hat |
| Product | red hat enterprise linux 8 |
| Published | Oct 5, 2023 |
| Last Updated | Nov 6, 2025 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2024:2394 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:2950 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:3138 access.redhat.com: https://access.redhat.com/security/cve/CVE-2023-42754 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2239845 seclists.org: https://seclists.org/oss-sec/2023/q4/14 lists.debian.org: https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/GISYSL3F6WIEVGHJGLC2MFNTUXHPTKQH/ lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/GPMICQ2HVZO5UAM5KPXHAZKA2U3ZDOO6/ lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/V5PDNWPKAP3WL5RQZ4RIDS6MG32OHH5R/