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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-74661

mac802154: fix netdev use-after-free in beacon worker

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: mac802154: fix netdev use-after-free in beacon worker mac802154_beacon_worker() reads local->beacon_req under RCU and derives the sub-interface from the request, but then drops the RCU read lock and continues to use both sdata and the embedded wpan_dev. mac802154_stop_beacons_locked() cancels only pending beacon work, clears local->beacon_req and frees the request. A beacon worker that is already running can therefore continue after interface teardown and dereference the freed netdev private area. The scan worker already pins the netdev before leaving RCU. Apply the same lifetime rule to the beacon worker: take a netdev reference while the request is still protected by RCU, and release it on all paths that continue after the reference is acquired.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 3accf4762734a69ebd03cba989249c78ac7dfc7e to < fe820dcc1d8ff77783a9d2bcc93b98c99ac6d517affected
  • 3accf4762734a69ebd03cba989249c78ac7dfc7e to < e5fb0e03bc7f45508c182a427357bf6b389a9033affected
  • 3accf4762734a69ebd03cba989249c78ac7dfc7e to < e6cd416a899edc912b428c4ba399bd73f516cb31affected
  • 3accf4762734a69ebd03cba989249c78ac7dfc7e to < 9d067e581597c462c51fee8a30b51bc48a68c4e1affected
  • 3accf4762734a69ebd03cba989249c78ac7dfc7e to < 5f26a690e8efa54315e4922368daf54e0b8f5515affected

Linux Linux

Default version status: affected

  • 6.3affected
  • 0 to < 6.3unaffected
  • 6.6.152 to ≤ 6.6.*unaffected
  • 6.12.104 to ≤ 6.12.*unaffected
  • 6.18.45 to ≤ 6.18.*unaffected
  • 7.1.9 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References