CVE-2026-45867
Description
In the Linux kernel, the following vulnerability has been resolved: power: supply: act8945a: Fix use-after-free in power_supply_changed() Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `power_supply` handle, means that the `power_supply` handle will be deallocated/unregistered _before_ the interrupt handler (since `devm_` naturally deallocates in reverse allocation order). This means that during removal, there is a race condition where an interrupt can fire just _after_ the `power_supply` handle has been freed, *but* just _before_ the corresponding unregistration of the IRQ handler has run. This will lead to the IRQ handler calling `power_supply_changed()` with a freed `power_supply` handle. Which usually crashes the system or otherwise silently corrupts the memory... Note that there is a similar situation which can also happen during `probe()`; the possibility of an interrupt firing _before_ registering the `power_supply` handle. This would then lead to the nasty situation of using the `power_supply` handle *uninitialized* in `power_supply_changed()`. Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `power_supply` handle.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 6.1.170-1 |
| debian | bullseye | fixed | 5.10.257-1 |
| debian | forky | fixed | 6.18.14-1 |
| debian | sid | fixed | 6.18.14-1 |
| debian | trixie | fixed | 6.12.85-1 |
| sles | affected | |
References
- https://git.kernel.org/stable/c/f2a0777b1e5a3cee1712c4d3e9095c0df8fc8cb3
- https://git.kernel.org/stable/c/0768e8525a46df103647ca5059b32320d7fd17e4
- https://git.kernel.org/stable/c/d023ef9f748b2090f7a9dbdd5c622b6ad99088ea
- https://git.kernel.org/stable/c/697bb5dc0cb4791e244f3970b067bc1ef33be9d9
- https://git.kernel.org/stable/c/76a42ba547a9b2e2337894f67a4d9247445007d5
- https://git.kernel.org/stable/c/f27eb76def5c07e4d7cc468b40741f19dafc83ce
- https://git.kernel.org/stable/c/83c1bd466c514cb24ca6ef347c5aac76a13c4e1e
- https://git.kernel.org/stable/c/3291c51d4684d048dd2eb91b5b65fcfdaf72141f
- https://security-tracker.debian.org/tracker/CVE-2026-45867
- https://www.suse.com/security/cve/CVE-2026-45867.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.