CVE-2023-42754

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.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-25)

CWE

CWE-476

Published

2023-10-05

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• fedoraproject:fedora
• linux:linux_kernel
• redhat:enterprise_linux

References

• https://access.redhat.com/errata/RHSA-2024:2394
• https://access.redhat.com/errata/RHSA-2024:2950
• https://access.redhat.com/errata/RHSA-2024:3138
• https://access.redhat.com/security/cve/CVE-2023-42754
• https://bugzilla.redhat.com/show_bug.cgi?id=2239845

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