CVE-2026-45902power: supply: bq256xx: Fix use-after-free in power_supply_changed()
- 7.8HighCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 94% 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: 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.
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 · Undergoing Analysis | 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 94% of all CVEs (12 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 32e4978bb920d047fe5de3ea42d176f267c01f63 – < 81d3688c9a2158329391e08f2d0b8ba204216044
- affected 32e4978bb920d047fe5de3ea42d176f267c01f63 – < 74b5a88318db97d51bb40f774736553c2acd1514
- affected 32e4978bb920d047fe5de3ea42d176f267c01f63 – < cb5c743936edcebc51880eeb6bf04979b5c9438b
- affected 32e4978bb920d047fe5de3ea42d176f267c01f63 – < 83c27fdd696ac13d023ef7a0345301be93209c53
- affected 32e4978bb920d047fe5de3ea42d176f267c01f63 – < 4b6fb0b6124f558131e502e3ffd03e6583b3ace6
- affected 32e4978bb920d047fe5de3ea42d176f267c01f63 – < 8796910131a32ff29275052df768ef022929a394
- affected 32e4978bb920d047fe5de3ea42d176f267c01f63 – < 8005843369723d9c8975b7c4202d1b85d6125302
- affected 5.12
- unaffected < 5.12
- 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/81d3688c9a2158329391e08f2d0b8ba204216044 (opens in a new tab)
- https://git.kernel.org/stable/c/74b5a88318db97d51bb40f774736553c2acd1514 (opens in a new tab)
- https://git.kernel.org/stable/c/cb5c743936edcebc51880eeb6bf04979b5c9438b (opens in a new tab)
- https://git.kernel.org/stable/c/83c27fdd696ac13d023ef7a0345301be93209c53 (opens in a new tab)
- https://git.kernel.org/stable/c/4b6fb0b6124f558131e502e3ffd03e6583b3ace6 (opens in a new tab)
- https://git.kernel.org/stable/c/8796910131a32ff29275052df768ef022929a394 (opens in a new tab)
- https://git.kernel.org/stable/c/8005843369723d9c8975b7c4202d1b85d6125302 (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-2026-32368 (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-2026-45902)Record last updated .