power: supply: bq256xx: Fix use-after-free in power_supply_changed()
Published May 27, 2026
7.8
HIGHCVSS 3.1
EPSS 0.17%
Description
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.
Affected products
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- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
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- Version 5.12StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<5.12
- Version 5.15.202StatusunaffectedConstraints<=5.15.*
- Version 6.1.165StatusunaffectedConstraints<=6.1.*
- Version 6.12.75StatusunaffectedConstraints<=6.12.*
- Version 6.18.14StatusunaffectedConstraints<=6.18.*
- Version 6.19.4StatusunaffectedConstraints<=6.19.*
- Version 6.6.128StatusunaffectedConstraints<=6.6.*
- Version 7.0StatusunaffectedConstraints<=*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
| ||||||||||||||||||||||||||||||
| Linux | Linux | affected |
|
- ≥ 5.12 · < 5.15.202
- ≥ 5.16 · < 6.1.165
- ≥ 6.2 · < 6.6.128
- ≥ 6.7 · < 6.12.75
- ≥ 6.13 · < 6.18.14
- ≥ 6.19 · < 6.19.4
No data.
Red Hat Enterprise Linux 10
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (12)
- https://access.redhat.com/security/cve/CVE-2026-45902 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2481953 Issue Tracking
- https://git.kernel.org/stable/c/4b6fb0b6124f558131e502e3ffd03e6583b3ace6 Patch
- https://git.kernel.org/stable/c/74b5a88318db97d51bb40f774736553c2acd1514 Patch
- https://git.kernel.org/stable/c/8005843369723d9c8975b7c4202d1b85d6125302 Patch
- https://git.kernel.org/stable/c/81d3688c9a2158329391e08f2d0b8ba204216044 Patch
- https://git.kernel.org/stable/c/83c27fdd696ac13d023ef7a0345301be93209c53 Patch
- https://git.kernel.org/stable/c/8796910131a32ff29275052df768ef022929a394 Patch
- https://git.kernel.org/stable/c/cb5c743936edcebc51880eeb6bf04979b5c9438b Patch
- https://lore.kernel.org/linux-cve-announce/2026052720-CVE-2026-45902-bfec@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2026-45902
- https://www.cve.org/CVERecord?id=CVE-2026-45902
Change history (0)
No recorded changes yet.