power: supply: ab8500_fg: fix use-after-free on remove
In the Linux kernel, the following vulnerability has been resolved: power: supply: ab8500_fg: fix use-after-free on remove ab8500_fg_remove() destroys the driver workqueue while the threaded interrupt handlers are still armed; they are devm-managed and freed only after ->remove() returns, so a handler that fires in that window queues work on the freed workqueue. Tear the workqueue down through devm instead, registering its cleanup after the power supply and before the interrupt requests. devm then frees the interrupts first, so the handlers can no longer queue work, before disabling the delayed and plain work items and destroying the workqueue. Disabling the items, rather than cancelling them, keeps them disabled so no producer (including the power-supply external_power_changed callback) can requeue them. Found by an in-house static analysis tool.
CVE-2026-89797
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89797
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "13151631b5bd06a1511353bb221079bbd76606c3",
"lessThan": "c2ce9b8f325f522e10e4d262b37ae49deb83e79b",
"versionType": "git"
},
{
"status": "affected",
"version": "13151631b5bd06a1511353bb221079bbd76606c3",
"lessThan": "c660c017dec1fd7cd88e1103c5ae1aae6ce636bf",
"versionType": "git"
},
{
"status": "affected",
"version": "13151631b5bd06a1511353bb221079bbd76606c3",
"lessThan": "013731074ab6a8d11ec209eee64c5b2656954479",
"versionType": "git"
},
{
"status": "affected",
"version": "13151631b5bd06a1511353bb221079bbd76606c3",
"lessThan": "75b1e88d34254f4fb7753345e21bfee47abddd7f",
"versionType": "git"
}
],
"programFiles": [
"drivers/power/supply/ab8500_fg.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/power/supply/ab8500_fg.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89797
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36265 · Revision 1
- Added to Heist Feed
- Publisher date