CVE-2026-23293· NVD / CVE Program· CNA Linux

net: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled

Noroxi assessment

Priority: Monitor (action score 22/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.12% (FIRST EPSS).
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Linux Linux 168ff39e4758897d2eee4756977d036d52884c7e, 5f93e6b4d12bd3a4517a6d447ea675f448f21434, 649e2bb74da54c96cf20729001e283626a2fefa0; azl3 kernel 6.6.126.1-1 on Azure Linux 3.0 6.6.130.1-1.

Low priority for now. Upgrade to Linux Linux 168ff39e4758897d2eee4756977d036d52884c7e, 5f93e6b4d12bd3a4517a6d447ea675f448f21434, 649e2bb74da54c96cf20729001e283626a2fefa0; azl3 kernel 6.6.126.1-1 on Azure Linux 3.0 6.6.130.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.5 · v3.1—No exploit Fix available

Published: Mar 25, 2026
Updated: Oct 15, 2026
EPSS: 0.1% · 2th percentile
CWE: CWE-476

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 22 / 40 · 5.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

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Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernel3.12 and later · before 5.10.253
linux linux kernel5.11 and later · before 5.15.203
linux linux kernel5.16 and later · before 6.1.167
linux linux kernel6.2 and later · before 6.6.130
linux linux kernel6.7 and later · before 6.12.77
linux linux kernel6.13 and later · before 6.18.17
linux linux kernel6.19 and later · before 6.19.7
linux linux kernel7.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

Linux Linux
- 3.12affected
- e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 and later · before 649e2bb74da54c96cf20729001e283626a2fefa0affected · git
- e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 and later · before dc3e62cf3bbf66280a907ec379f373d0c3b8b2bcaffected · git
- e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 and later · before b5190fcd75a1f1785c766a8d1e44d3938e168f45affected · git
- e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 and later · before 5f93e6b4d12bd3a4517a6d447ea675f448f21434affected · git
- e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 and later · before f0373e9317bc904e7bdb123d3106fe4f3cea2fb7affected · git
- e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 and later · before fbbd2118982c55fb9b0a753ae0cf7194e77149fbaffected · git
- e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 and later · before abcd48ecdeb2e12eccb8339a35534c757782afcdaffected · git
- e15a00aafa4b7953ad717d3cb1ad7acf4ff76945 and later · before 168ff39e4758897d2eee4756977d036d52884c7eaffected · git
- before 3.12not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.170-1	6.1.170-1
Debian:13	linux	before 6.12.85-1	6.12.85-1
Debian:14	linux	before 6.19.8-1	6.19.8-1
SUSE:Linux Enterprise Micro 5.2	kernel-default	before 5.3.18-150300.59.241.1	5.3.18-150300.59.241.1
SUSE:Linux Enterprise Micro 5.2	kernel-default-base	before 5.3.18-150300.59.241.1.150300.18.144.1	5.3.18-150300.59.241.1.150300.18.144.1
SUSE:Linux Enterprise Micro 5.2	kernel-rt	before 5.3.18-150300.241.1	5.3.18-150300.241.1
SUSE:Linux Enterprise Micro 5.2	kernel-source	before 5.3.18-150300.59.241.1	5.3.18-150300.59.241.1
SUSE:Linux Enterprise Micro 5.2	kernel-source-rt	before 5.3.18-150300.241.1	5.3.18-150300.241.1

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Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Linux Linux	168ff39e4758897d2eee4756977d036d52884c7e	Vendor (CNA)
Linux Linux	5f93e6b4d12bd3a4517a6d447ea675f448f21434	Vendor (CNA)
Linux Linux	649e2bb74da54c96cf20729001e283626a2fefa0	Vendor (CNA)
Linux Linux	abcd48ecdeb2e12eccb8339a35534c757782afcd	Vendor (CNA)
Linux Linux	b5190fcd75a1f1785c766a8d1e44d3938e168f45	Vendor (CNA)
Linux Linux	dc3e62cf3bbf66280a907ec379f373d0c3b8b2bc	Vendor (CNA)
Linux Linux	f0373e9317bc904e7bdb123d3106fe4f3cea2fb7	Vendor (CNA)
Linux Linux	fbbd2118982c55fb9b0a753ae0cf7194e77149fb	Vendor (CNA)
azl3 kernel 6.6.126.1-1 on Azure Linux 3.0	6.6.130.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
debian:linux	6.1.170-1 · Debian:12	Package registry (OSV)
suse:kernel-default	5.3.18-150300.59.241.1 · SUSE:Linux Enterprise Micro 5.2	Package registry (OSV)
suse:kernel-default-base	5.3.18-150300.59.241.1.150300.18.144.1 · SUSE:Linux Enterprise Micro 5.2	Package registry (OSV)
suse:kernel-rt	5.3.18-150300.241.1 · SUSE:Linux Enterprise Micro 5.2	Package registry (OSV)
suse:kernel-source	5.3.18-150300.59.241.1 · SUSE:Linux Enterprise Micro 5.2	Package registry (OSV)
suse:kernel-source-rt	5.3.18-150300.241.1 · SUSE:Linux Enterprise Micro 5.2	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

Fix✗ → ✓Sep 28, 2026, 10:09 PM UTC

For records you follow, these changes also arrive as notifications. →

References

git.kernel.org/stable/c/168ff39e4758897d2eee4756977d036d52884c7e

Show all references (10 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records