CVE-2025-22103None▾ SunlitIn 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 deref…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 14.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
5.5 → —
medium → none
0.2% → 0.2%
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.
Linux >= c675e06a98a474f7ad0af32ce467613da818da52 < 1da52878f7fb74ace304f74325bb89e3e5546b55Linux >= c675e06a98a474f7ad0af32ce467613da818da52 < d97d6b1bd2b7f2a188d261d44c4519a13b8c406aLinux >= c675e06a98a474f7ad0af32ce467613da818da52 < 8da4d7f9141e8dbd3ece2f0e6930a0ea8812c862Linux >= c675e06a98a474f7ad0af32ce467613da818da52 < 52b44d8c653459c658b733d13658afdde45f6836Linux >= c675e06a98a474f7ad0af32ce467613da818da52 < 59599bce44af3df7a215ebc81cb166426e1c9204Linux >= c675e06a98a474f7ad0af32ce467613da818da52 < f9dff65140efc289f01bcf39c3ca66a8806b6132Linux >= c675e06a98a474f7ad0af32ce467613da818da52 < 0032c99e83b9ce6d5995d65900aa4b6ffb501cceLinux 5.1Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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