CVE-2025-22103

net: fix NULL pointer dereference in l3mdev_l3_rcv

MEDIUM

5.5

CVSS Score

Published: April 16, 2025 at 02:12 PM UTC

Updated: September 14, 2026 at 12:34 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

5.1 ≤ v < 5.10.2705.1 ≤ v < 5.15.2215.1 ≤ v < 6.1.1885.1 ≤ v < 6.12.465.1 ≤ v < 6.14.25.1 ≤ v < 6.155.1 ≤ v < 6.6.1176.13 ≤ v < 6.14.25.1c675e06a98a474f7ad0af32ce467613da818da52

Vendor states this is fixed in 0032c99e83b9ce6d5995d65900aa4b6ffb501cce (fixed)

Vendor states this is fixed in 1da52878f7fb74ace304f74325bb89e3e5546b55 (fixed)

Vendor states this is fixed in 52b44d8c653459c658b733d13658afdde45f6836 (fixed)

Vendor states this is fixed in 59599bce44af3df7a215ebc81cb166426e1c9204 (fixed)

Vendor states this is fixed in 8da4d7f9141e8dbd3ece2f0e6930a0ea8812c862 (fixed)

Vendor states this is fixed in d97d6b1bd2b7f2a188d261d44c4519a13b8c406a (fixed)

Vendor states this is fixed in f9dff65140efc289f01bcf39c3ca66a8806b6132 (fixed)

Vendor states this is fixed in 5.1 (unaffected)

Vendor states this is fixed in 5.10.270 (unaffected)

Vendor states this is fixed in 5.15.221 (unaffected)

Vendor states this is fixed in 6.1.188 (unaffected)

Vendor states this is fixed in 6.12.46 (unaffected)