CVE-2025-22103

net: fix NULL pointer dereference in l3mdev_l3_rcv

Published Apr 16, 2025 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Description

In the Linux kernel, the following vulnerability has been resolved:

net: fix NULL pointer dereference in l3mdev_l3_rcv

When delete l3s ipvlan:

ip link del link eth0 ipvlan1 type ipvlan mode l3s

This may cause a null pointer dereference:

Call trace:
ip_rcv_finish+0x48/0xd0
ip_rcv+0x5c/0x100
__netif_receive_skb_one_core+0x64/0xb0
__netif_receive_skb+0x20/0x80
process_backlog+0xb4/0x204
napi_poll+0xe8/0x294
net_rx_action+0xd8/0x22c
__do_softirq+0x12c/0x354

This is because l3mdev_l3_rcv() visit dev->l3mdev_ops after
ipvlan_l3s_unregister() assign the dev->l3mdev_ops to NULL. The process
like this:

(CPU1) | (CPU2)
l3mdev_l3_rcv() |
check dev->priv_flags: |
master = skb->dev; |
|
| ipvlan_l3s_unregister()
| set dev->priv_flags
| dev->l3mdev_ops = NULL;
|
visit master->l3mdev_ops |

To avoid this by do not set dev->l3mdev_ops when unregister l3s ipvlan.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`c675e06a98a474f7ad0af32ce467613da818da52`	affected	< 1da52878f7fb74ace304f74325bb89e3e5546b55
`c675e06a98a474f7ad0af32ce467613da818da52`	affected	< d97d6b1bd2b7f2a188d261d44c4519a13b8c406a
`c675e06a98a474f7ad0af32ce467613da818da52`	affected	< 8da4d7f9141e8dbd3ece2f0e6930a0ea8812c862
`c675e06a98a474f7ad0af32ce467613da818da52`	affected	< 52b44d8c653459c658b733d13658afdde45f6836
`c675e06a98a474f7ad0af32ce467613da818da52`	affected	< 59599bce44af3df7a215ebc81cb166426e1c9204
`c675e06a98a474f7ad0af32ce467613da818da52`	affected	< f9dff65140efc289f01bcf39c3ca66a8806b6132
`c675e06a98a474f7ad0af32ce467613da818da52`	affected	< 0032c99e83b9ce6d5995d65900aa4b6ffb501cce

Linux

affected

Version	Status	Constraints
`5.1`	affected	—
`0`	unaffected	< 5.1
`5.10.270`	unaffected	≤ 5.10.*
`5.15.221`	unaffected	≤ 5.15.*
`6.1.188`	unaffected	≤ 6.1.*
`6.6.117`	unaffected	≤ 6.6.*
`6.12.46`	unaffected	≤ 6.12.*
`6.14.2`	unaffected	≤ 6.14.*
`6.15`	unaffected	≤ *

Configuration 1 [-]

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
Debian DLA	DLA-4841-1	linux security update
Debian DSA	DSA-6008-1	linux security update
EUVD	EUVD-2025-11207	In the Linux kernel, the following vulnerability has been resolved: net: fix NULL pointer dereference in l3mdev_l3_rcv When delete l3s ipvlan: ip link del link eth0 ipvlan1 type ipvlan mode l3s This may cause a null pointer dereference: Call trace: ip_rcv_finish+0x48/0xd0 ip_rcv+0x5c/0x100 __netif_receive_skb_one_core+0x64/0xb0 __netif_receive_skb+0x20/0x80 process_backlog+0xb4/0x204 napi_poll+0xe8/0x294 net_rx_action+0xd8/0x22c __do_softirq+0x12c/0x354 This is because l3mdev_l3_rcv() visit dev->l3mdev_ops after ipvlan_l3s_unregister() assign the dev->l3mdev_ops to NULL. The process like this: (CPU1) \| (CPU2) l3mdev_l3_rcv() \| check dev->priv_flags: \| master = skb->dev; \| \| \| ipvlan_l3s_unregister() \| set dev->priv_flags \| dev->l3mdev_ops = NULL; \| visit master->l3mdev_ops \| To avoid this by do not set dev->l3mdev_ops when unregister l3s ipvlan.
Ubuntu USN	USN-7594-1	Linux kernel vulnerabilities
Ubuntu USN	USN-7594-2	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-7594-3	Linux kernel vulnerabilities
Ubuntu USN	USN-8095-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8095-2	Linux kernel (FIPS) vulnerabilities
Ubuntu USN	USN-8100-1	Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN	USN-8095-3	Linux kernel (Real-time) vulnerabilities
Ubuntu USN	USN-8095-4	Linux kernel (AWS) vulnerabilities
Ubuntu USN	USN-8125-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8126-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8095-5	Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN	USN-8165-1	Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN	USN-8261-1	Linux kernel (Xilinx) vulnerabilities
Ubuntu USN	USN-8961-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9029-1	Linux kernel (Raspberry Pi) vulnerabilities

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.208% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/0032c99e83b9ce6d5995d65900aa4b6ffb501cce
https://git.kernel.org/stable/c/1da52878f7fb74ace304f74325bb89e3e5546b55
https://git.kernel.org/stable/c/52b44d8c653459c658b733d13658afdde45f6836
https://git.kernel.org/stable/c/59599bce44af3df7a215ebc81cb166426e1c9204
https://git.kernel.org/stable/c/8da4d7f9141e8dbd3ece2f0e6930a0ea8812c862
https://git.kernel.org/stable/c/d97d6b1bd2b7f2a188d261d44c4519a13b8c406a
https://git.kernel.org/stable/c/f9dff65140efc289f01bcf39c3ca66a8806b6132
https://lore.kernel.org/linux-cve-announce/2025041621-CVE-2025-22103-b3a2@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2025-22103
https://www.cve.org/CVERecord?id=CVE-2025-22103

History

Sep 14, 2026 12:00 PM Added references View changes

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/1da52878f7fb74ace304f74325bb89e3e5546b55 https://git.kernel.org/stable/c/8da4d7f9141e8dbd3ece2f0e6930a0ea8812c862 https://git.kernel.org/stable/c/d97d6b1bd2b7f2a188d261d44c4519a13b8c406a

Nov 24, 2025 10:00 AM Added references View changes

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/52b44d8c653459c658b733d13658afdde45f6836

Nov 4, 2025 5:15 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel

Sep 9, 2025 5:15 PM Added references View changes

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/59599bce44af3df7a215ebc81cb166426e1c9204

Apr 30, 2025 3:15 PM Weaknesses updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-476

Apr 19, 2025 2:00 AM Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2025041621-CVE-2025-22103-b3a2@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2025-22103 https://www.cve.org/CVERecord?id=CVE-2025-22103
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Moderate`

Apr 16, 2025 2:30 PM Description updated. Title updated. Added references View changes

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: net: fix NULL pointer dereference in l3mdev_l3_rcv When delete l3s ipvlan: ip link del link eth0 ipvlan1 type ipvlan mode l3s This may cause a null pointer dereference: Call trace: ip_rcv_finish+0x48/0xd0 ip_rcv+0x5c/0x100 __netif_receive_skb_one_core+0x64/0xb0 __netif_receive_skb+0x20/0x80 process_backlog+0xb4/0x204 napi_poll+0xe8/0x294 net_rx_action+0xd8/0x22c __do_softirq+0x12c/0x354 This is because l3mdev_l3_rcv() visit dev->l3mdev_ops after ipvlan_l3s_unregister() assign the dev->l3mdev_ops to NULL. The process like this: (CPU1) \| (CPU2) l3mdev_l3_rcv() \| check dev->priv_flags: \| master = skb->dev; \| \| \| ipvlan_l3s_unregister() \| set dev->priv_flags \| dev->l3mdev_ops = NULL; \| visit master->l3mdev_ops \| To avoid this by do not set dev->l3mdev_ops when unregister l3s ipvlan.
Title		net: fix NULL pointer dereference in l3mdev_l3_rcv
References		https://git.kernel.org/stable/c/0032c99e83b9ce6d5995d65900aa4b6ffb501cce https://git.kernel.org/stable/c/f9dff65140efc289f01bcf39c3ca66a8806b6132