CVE-2026-45946power: supply: ab8500: Fix use-after-free in power_supply_changed()
- 7.8HighCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 95% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: power: supply: ab8500: 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()`. Commit 1c1f13a006ed ("power: supply: ab8500: Move to componentized binding") introduced this issue during a refactorization. Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `power_supply` handle.
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb – < 43cbb78ee047b9b12d096d40e3be265969d4c1f8
- affected 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb – < 551672981fe227122258a25a385a05f5c0746ad6
- affected 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb – < f50433f2603def08b21a4bf2fd238687fb5cbde9
- affected 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb – < 847eeb6c0efcd76c7def73857cf798a4fcd8f79b
- affected 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb – < 709db4b476e254579d9c48ec34d397a41ca0c407
- affected 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb – < 46dbda27b028d78087667e8280966b99cec015ca
- affected 1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb – < c4af8a98bb52825a5331ae1d0604c0ea6956ba4b
- affected 341db343768bc44f3512facc464021730d64071c
- affected 5.13.4 – < 5.14
- affected 5.14
- unaffected < 5.14
- unaffected 5.15.202 – ≤ 5.15.*
- unaffected 6.1.165 – ≤ 6.1.*
- unaffected 6.6.128 – ≤ 6.6.*
- unaffected 6.12.75 – ≤ 6.12.*
- unaffected 6.18.14 – ≤ 6.18.*
- unaffected 6.19.4 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References7
- https://git.kernel.org/stable/c/43cbb78ee047b9b12d096d40e3be265969d4c1f8 (opens in a new tab)
- https://git.kernel.org/stable/c/551672981fe227122258a25a385a05f5c0746ad6 (opens in a new tab)
- https://git.kernel.org/stable/c/f50433f2603def08b21a4bf2fd238687fb5cbde9 (opens in a new tab)
- https://git.kernel.org/stable/c/847eeb6c0efcd76c7def73857cf798a4fcd8f79b (opens in a new tab)
- https://git.kernel.org/stable/c/709db4b476e254579d9c48ec34d397a41ca0c407 (opens in a new tab)
- https://git.kernel.org/stable/c/46dbda27b028d78087667e8280966b99cec015ca (opens in a new tab)
- https://git.kernel.org/stable/c/c4af8a98bb52825a5331ae1d0604c0ea6956ba4b (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-32230 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-45946)Record last updated .