CVE-2026-45902 (GCVE-0-2026-45902)
Vulnerability from cvelistv5 – Published: 2026-05-27 12:17 – Updated: 2026-05-27 12:17
VLAI
EPSS
VEX
Title
power: supply: bq256xx: Fix use-after-free in power_supply_changed()
Summary
In the Linux kernel, the following vulnerability has been resolved:
power: supply: bq256xx: 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.
Severity
7.8 (High)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
32e4978bb920d047fe5de3ea42d176f267c01f63 , < 81d3688c9a2158329391e08f2d0b8ba204216044
(git)
Affected: 32e4978bb920d047fe5de3ea42d176f267c01f63 , < 74b5a88318db97d51bb40f774736553c2acd1514 (git) Affected: 32e4978bb920d047fe5de3ea42d176f267c01f63 , < cb5c743936edcebc51880eeb6bf04979b5c9438b (git) Affected: 32e4978bb920d047fe5de3ea42d176f267c01f63 , < 83c27fdd696ac13d023ef7a0345301be93209c53 (git) Affected: 32e4978bb920d047fe5de3ea42d176f267c01f63 , < 4b6fb0b6124f558131e502e3ffd03e6583b3ace6 (git) Affected: 32e4978bb920d047fe5de3ea42d176f267c01f63 , < 8796910131a32ff29275052df768ef022929a394 (git) Affected: 32e4978bb920d047fe5de3ea42d176f267c01f63 , < 8005843369723d9c8975b7c4202d1b85d6125302 (git) |
guessed | |
| Linux | Linux |
Affected:
5.12
Unaffected: 0 , < 5.12 (semver) Unaffected: 5.15.202 , ≤ 5.15.* (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.14 , ≤ 6.18.* (semver) Unaffected: 6.19.4 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
guessed |
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},
{
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: bq256xx: Fix use-after-free in power_supply_changed()\n\nUsing the `devm_` variant for requesting IRQ _before_ the `devm_`\nvariant for allocating/registering the `power_supply` handle, means that\nthe `power_supply` handle will be deallocated/unregistered _before_ the\ninterrupt handler (since `devm_` naturally deallocates in reverse\nallocation order). This means that during removal, there is a race\ncondition where an interrupt can fire just _after_ the `power_supply`\nhandle has been freed, *but* just _before_ the corresponding\nunregistration of the IRQ handler has run.\n\nThis will lead to the IRQ handler calling `power_supply_changed()` with\na freed `power_supply` handle. Which usually crashes the system or\notherwise silently corrupts the memory...\n\nNote that there is a similar situation which can also happen during\n`probe()`; the possibility of an interrupt firing _before_ registering\nthe `power_supply` handle. This would then lead to the nasty situation\nof using the `power_supply` handle *uninitialized* in\n`power_supply_changed()`.\n\nFix this racy use-after-free by making sure the IRQ is requested _after_\nthe registration of the `power_supply` handle."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-27T12:17:10.508Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"url": "https://git.kernel.org/stable/c/81d3688c9a2158329391e08f2d0b8ba204216044"
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"url": "https://git.kernel.org/stable/c/8005843369723d9c8975b7c4202d1b85d6125302"
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"datePublished": "2026-05-27T12:17:10.508Z",
"dateReserved": "2026-05-13T15:03:33.084Z",
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"date": "2026-09-14",
"epss": "0.00164",
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This means that during removal, there is a race\\ncondition where an interrupt can fire just _after_ the `power_supply`\\nhandle has been freed, *but* just _before_ the corresponding\\nunregistration of the IRQ handler has run.\\n\\nThis will lead to the IRQ handler calling `power_supply_changed()` with\\na freed `power_supply` handle. Which usually crashes the system or\\notherwise silently corrupts the memory...\\n\\nNote that there is a similar situation which can also happen during\\n`probe()`; the possibility of an interrupt firing _before_ registering\\nthe `power_supply` handle. This would then lead to the nasty situation\\nof using the `power_supply` handle *uninitialized* in\\n`power_supply_changed()`.\\n\\nFix this racy use-after-free by making sure the IRQ is requested _after_\\nthe registration of the `power_supply` 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"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-06-28T07:40:01+00:00",
"cve": "CVE-2026-45902",
"id": "CVE-2026-45902",
"initial_release_date": "2026-05-27T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: power: supply: bq256xx: Fix use-after-free in power_supply_changed()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45902.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-31T16:59:25Z",
"cve": "CVE-2026-45902",
"id": "CVE-2026-45902",
"initial_release_date": "2026-05-28T03:56:32Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "528",
"product_status:known_not_affected": "190",
"product_status:recommended": "250",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-45902",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-45902.json",
"version": "9"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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