CVE-2026-23293

MEDIUM EPSS 2.4%
Published Mar 25, 20263mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Mar 25, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: net: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled When booting with the 'ipv6.disable=1' parameter, the nd_tbl is never initialized because inet6_init() exits before ndisc_init() is called which initializes it. If an IPv6 packet is injected into the interface, route_shortcircuit() is called and a NULL pointer dereference happens on neigh_lookup(). BUG: kernel NULL pointer dereference, address: 0000000000000380 Oops: Oops: 0000 [#1] SMP NOPTI [...] RIP: 0010:neigh_lookup+0x20/0x270 [...] Call Trace: <TASK> vxlan_xmit+0x638/0x1ef0 [vxlan] dev_hard_start_xmit+0x9e/0x2e0 __dev_queue_xmit+0xbee/0x14e0 packet_sendmsg+0x116f/0x1930 __sys_sendto+0x1f5/0x200 __x64_sys_sendto+0x24/0x30 do_syscall_64+0x12f/0x1590 entry_SYSCALL_64_after_hwframe+0x76/0x7e Fix this by adding an early check on route_shortcircuit() when protocol is ETH_P_IPV6. Note that ipv6_mod_enabled() cannot be used here because VXLAN can be built-in even when IPv6 is built as a module.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
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

Threat Intelligence

EPSS Exploit Probability
2.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥3.12  –  <5.10.253
linuxlinux_kernel*≥5.11  –  <5.15.203
linuxlinux_kernel*≥5.16  –  <6.1.167
linuxlinux_kernel*≥6.2  –  <6.6.130
linuxlinux_kernel*≥6.7  –  <6.12.77
linuxlinux_kernel*≥6.13  –  <6.18.17
linuxlinux_kernel*≥6.19  –  <6.19.7
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/168ff39e4758897d2eee4756977d036d52884c7e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5f93e6b4d12bd3a4517a6d447ea675f448f21434
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/649e2bb74da54c96cf20729001e283626a2fefa0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/abcd48ecdeb2e12eccb8339a35534c757782afcd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b5190fcd75a1f1785c766a8d1e44d3938e168f45
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dc3e62cf3bbf66280a907ec379f373d0c3b8b2bc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f0373e9317bc904e7bdb123d3106fe4f3cea2fb7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fbbd2118982c55fb9b0a753ae0cf7194e77149fb
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/168ff39e4758897d2eee4756977d036d52884c7e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5f93e6b4d12bd3a4517a6d447ea675f448f21434
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/649e2bb74da54c96cf20729001e283626a2fefa0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/abcd48ecdeb2e12eccb8339a35534c757782afcd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b5190fcd75a1f1785c766a8d1e44d3938e168f45
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dc3e62cf3bbf66280a907ec379f373d0c3b8b2bc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f0373e9317bc904e7bdb123d3106fe4f3cea2fb7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fbbd2118982c55fb9b0a753ae0cf7194e77149fb
    Patch