iio: buffer: Tie IIO dma fence lock lifetime to the fence
In the Linux kernel, the following vulnerability has been resolved: iio: buffer: Tie IIO dma fence lock lifetime to the fence The `iio_dma_fence` implementation currently uses a lock embedded in the `iio_dmabuf_priv`. But the `iio_dma_fence` can outlive the `iio_dmabuf_priv`, which can cause a use-after-free. Tie the lifetime of the lock to the lifetime of the fence by embedding them in the same struct. We can't just hold a reference to the `iio_dmabuf_priv` from the `iio_dma_fence` since `iio_buffer_dmabuf_release()` might sleep and the fence release callback is not allowed to sleep. Note that the `dma_fence` framework now has an internal lock that gets used when the passing `NULL` for `lock` in `dma_fence_init()`, but in order to allow this patch to be backportable use an external lock.
CVE-2026-89940
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-2026-89940
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": "3e26d9f08fbe0b73e951a5e810fdb7a332b7e37f",
"lessThan": "6865d79fca17a80fbd60c12550ca9a5e0e20e0eb",
"versionType": "git"
},
{
"status": "affected",
"version": "3e26d9f08fbe0b73e951a5e810fdb7a332b7e37f",
"lessThan": "510497e31be4f241103507315a859e2085ccb081",
"versionType": "git"
},
{
"status": "affected",
"version": "3e26d9f08fbe0b73e951a5e810fdb7a332b7e37f",
"lessThan": "8b3e221590181a8beb3735bbabf166df02c839b5",
"versionType": "git"
},
{
"status": "affected",
"version": "3e26d9f08fbe0b73e951a5e810fdb7a332b7e37f",
"lessThan": "f25ec4627d935dedfb5fe83bd2c2678cdcc19611",
"versionType": "git"
}
],
"programFiles": [
"drivers/iio/industrialio-buffer.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.110",
"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/iio/industrialio-buffer.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89940
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #36382 · Revision 1
- Added to Heist Feed
- Publisher date