power: supply: cpcap-battery: Fix use-after-free in power_supply_changed()
Summary
| CVE | CVE-2026-45885 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-27 14:17:02 UTC |
| Updated | 2026-05-27 14:48:31 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: power: supply: cpcap-battery: 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. |
Risk And Classification
EPSS: 0.000240000 probability, percentile 0.073320000 (date 2026-06-01)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 874b2adbed1253a11549cb9b7b912ab65fea9cf2 c549dd3de4b3f6e726d1b8386d40ccf7d3abdbe4 git | Not specified |
| CNA | Linux | Linux | affected 874b2adbed1253a11549cb9b7b912ab65fea9cf2 3ff75cba1c98349a23a8f9333981deba1972cc11 git | Not specified |
| CNA | Linux | Linux | affected 874b2adbed1253a11549cb9b7b912ab65fea9cf2 2ce2334be155bd8bad6377e99984246ce4dbd08c git | Not specified |
| CNA | Linux | Linux | affected 874b2adbed1253a11549cb9b7b912ab65fea9cf2 cbb9b07f88a9ef6518934c41eb3e8cf840d657d5 git | Not specified |
| CNA | Linux | Linux | affected 874b2adbed1253a11549cb9b7b912ab65fea9cf2 f3fbe309c9bfe1aac1e2b26543e9dc4829f3275a git | Not specified |
| CNA | Linux | Linux | affected 874b2adbed1253a11549cb9b7b912ab65fea9cf2 2841bbb5a35c4449c0a0458e8e476b2a62f95147 git | Not specified |
| CNA | Linux | Linux | affected 874b2adbed1253a11549cb9b7b912ab65fea9cf2 e261be6f18929f2397cd54cd583a2df624c129c1 git | Not specified |
| CNA | Linux | Linux | affected 874b2adbed1253a11549cb9b7b912ab65fea9cf2 642f33e34b969eedec334738fd5df95d2dc42742 git | Not specified |
| CNA | Linux | Linux | affected 4.13 | Not specified |
| CNA | Linux | Linux | unaffected 4.13 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.252 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.202 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.165 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.128 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.75 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.14 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19.4 6.19.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/e261be6f18929f2397cd54cd583a2df624c129c1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c549dd3de4b3f6e726d1b8386d40ccf7d3abdbe4 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/2ce2334be155bd8bad6377e99984246ce4dbd08c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/642f33e34b969eedec334738fd5df95d2dc42742 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f3fbe309c9bfe1aac1e2b26543e9dc4829f3275a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/3ff75cba1c98349a23a8f9333981deba1972cc11 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/cbb9b07f88a9ef6518934c41eb3e8cf840d657d5 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/2841bbb5a35c4449c0a0458e8e476b2a62f95147 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.