mac802154: hold an interface reference across the scan worker
Summary
| CVE | CVE-2026-68126 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-10 13:19:57 UTC |
| Updated | 2026-08-17 05:18:12 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: mac802154: hold an interface reference across the scan worker mac802154_scan_worker() captures the scanning sub-interface under RCU and then keeps dereferencing sdata->dev after rcu_read_unlock() and outside the rtnl -- in the failure traces, in mac802154_transmit_beacon_req() (skb->dev = sdata->dev), and in the end_scan cleanup. Nothing keeps that netdev alive across the worker iteration. A concurrent DEL_INTERFACE or PHY removal can unregister the interface once the worker drops the rtnl between its two drv_set_channel() sections. unregister_netdevice() frees the netdev asynchronously from netdev_run_todo() with the rtnl already dropped, so neither holding the rtnl nor the per-PHY IEEE802154_IS_SCANNING flag prevents a stale worker iteration from dereferencing the freed netdev -- a KASAN slab-use-after-free, reachable by racing TRIGGER_SCAN against DEL_INTERFACE (both CAP_NET_ADMIN). Pin the netdev with netdev_hold() while the RCU read lock is still held, and release it at every worker exit. |
Risk And Classification
EPSS: 0.001750000 probability, percentile 0.073170000 (date 2026-08-17)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 57588c71177f0bfc08509c2c3a9bfe32850c0786 bd7110f0caa32426140ff302a209c53294ef2cfd git | Not specified |
| CNA | Linux | Linux | affected 57588c71177f0bfc08509c2c3a9bfe32850c0786 dd4754194a706163294b6141460101b99082c8c7 git | Not specified |
| CNA | Linux | Linux | affected 57588c71177f0bfc08509c2c3a9bfe32850c0786 59c1d5463b7bc5a2cdaae27108d1dfd67edc7d1b git | Not specified |
| CNA | Linux | Linux | affected 57588c71177f0bfc08509c2c3a9bfe32850c0786 5f303f622f6bb8907c405e5123a0ab0f70fb0065 git | Not specified |
| CNA | Linux | Linux | affected 57588c71177f0bfc08509c2c3a9bfe32850c0786 234e5e898b713bc0b3a631b6f002897f43d046c8 git | Not specified |
| CNA | Linux | Linux | affected 6.3 | Not specified |
| CNA | Linux | Linux | unaffected 6.3 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.148 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.101 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.42 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.6 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/234e5e898b713bc0b3a631b6f002897f43d046c8 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/59c1d5463b7bc5a2cdaae27108d1dfd67edc7d1b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/bd7110f0caa32426140ff302a209c53294ef2cfd | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/dd4754194a706163294b6141460101b99082c8c7 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/5f303f622f6bb8907c405e5123a0ab0f70fb0065 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.