CVE-2026-89464
Description
In the Linux kernel, the following vulnerability has been resolved: power: supply: twl4030_charger: cancel workers via devm bci is devm-allocated. Two workers (bci->work and bci->current_worker) dereference it. twl4030_bci_remove() disables charging and masks interrupts. It cancels neither worker. A worker pending at remove() can run after devm frees bci. The USB transceiver comes from devm_usb_get_phy_by_node(). devm unregisters its notifier only after remove() returns. A cancel_work_sync() in remove() can then race a notifier reschedule. devm_work_autocancel() and devm_delayed_work_autocancel() avoid that. They cancel the workers during devm release, before bci is freed. The current_worker is registered first, since devm will cancel in reverse order and bci->work can reschedule current_worker. [Move comment about order into the commit message]
How to fix
- Linux Linux9644c96ef8646c65d46caa5139a6631e29b79d6c, e9fffe10bd791082263c1678f2f6cdd6d7b487e0, c46c205bab0dfce4dd54aeb49da3f183e1fdfc63, 72a2d6cd049f892853e4e2d8d8fc5e7d0244a458, a4460e89d4088cfec2da5be33e265ef1a8e780e9, b955da82db4170bdf1c784dc457287aa0c977378, 6eba34732524067da2aad5ddfdfbc641ded10e9e or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | d6ccc442b12102414c1343f0adacaa8a1aaa516c ≤ v < 9644c96ef8646c65d46caa5139a6631e29b79d6c, d6ccc442b12102414c1343f0adacaa8a1aaa516c ≤ v < e9fffe10bd791082263c1678f2f6cdd6d7b487e0, d6ccc442b12102414c1343f0adacaa8a1aaa516c ≤ v < c46c205bab0dfce4dd54aeb49da3f183e1fdfc63, d6ccc442b12102414c1343f0adacaa8a1aaa516c ≤ v < 72a2d6cd049f892853e4e2d8d8fc5e7d0244a458, d6ccc442b12102414c1343f0adacaa8a1aaa516c ≤ v < a4460e89d4088cfec2da5be33e265ef1a8e780e9, d6ccc442b12102414c1343f0adacaa8a1aaa516c ≤ v < b955da82db4170bdf1c784dc457287aa0c977378, d6ccc442b12102414c1343f0adacaa8a1aaa516c ≤ v < 6eba34732524067da2aad5ddfdfbc641ded10e9e, 2.6.39 | 9644c96ef8646c65d46caa5139a6631e29b79d6c, e9fffe10bd791082263c1678f2f6cdd6d7b487e0, c46c205bab0dfce4dd54aeb49da3f183e1fdfc63, 72a2d6cd049f892853e4e2d8d8fc5e7d0244a458, a4460e89d4088cfec2da5be33e265ef1a8e780e9, b955da82db4170bdf1c784dc457287aa0c977378, 6eba34732524067da2aad5ddfdfbc641ded10e9e |
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