Revert "media: v4l2-dev: fix error handling in __video_register_device()"
In the Linux kernel, the following vulnerability has been resolved: Revert "media: v4l2-dev: fix error handling in __video_register_device()" This reverts commit 2a934fdb01db6458288fc9386d3d8ceba6dd551a. The intentions of that patch were good, but it doesn't work. The idea is that if device_register fails, you have to do a put_device to let the ref counter release resources. However, the V4L2 API says that if video_register_device() fails, then you have to call video_device_release(), which kfree()s the video_device struct. But the put_device() will already have freed the struct, so you end up in a double-free scenario. There is not really a good way of fixing this without breaking video_register_device() into two parts, one that initializes everything, and one that does the actual device_register, and then converting all V4L2 drivers to this new model. That is a massive job, and it is very unlikely that device_register will fail. So rather than ending up in a double-free scenario, just revert this patch, and in that case we'll have a small memory leak. Which is a lot more robust.
CVE-2026-89741
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-2026-89741
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": "e5c8e62ae551e0ad2e15412aa0c57c2856d59677",
"lessThan": "8b998c171ed875e402e1fd1c5cd619e4ca05e9c1",
"versionType": "git"
},
{
"status": "affected",
"version": "8b451a9a46f2bfc510e6d5c2492df91647586184",
"lessThan": "3de14b4f681a1b3c6d375d98d9d37a55ebb85349",
"versionType": "git"
},
{
"status": "affected",
"version": "b6be1f5633eae200af2527e9eeb7f51be5739b0f",
"lessThan": "8027f82c0f5474ed72448e160ee9778051fa1f49",
"versionType": "git"
},
{
"status": "affected",
"version": "ae7b143e05b36fc69d6571751855946cc45064c6",
"lessThan": "2ac009a65d2385e9f0799eaf9d9694a29153a161",
"versionType": "git"
},
{
"status": "affected",
"version": "2429bb9fad88c8fa84c4956b0a21cf5afe5e92b7",
"lessThan": "712ca1cf756de2557a116e0df55791bac0c9f99e",
"versionType": "git"
},
{
"status": "affected",
"version": "2a934fdb01db6458288fc9386d3d8ceba6dd551a",
"lessThan": "aad08b5f67d2a8116e1a00bce2611c1513b10bce",
"versionType": "git"
},
{
"status": "affected",
"version": "2a934fdb01db6458288fc9386d3d8ceba6dd551a",
"lessThan": "ce792b94e03882108019ba996c1a7c4d4e09be2c",
"versionType": "git"
},
{
"status": "affected",
"version": "2a934fdb01db6458288fc9386d3d8ceba6dd551a",
"lessThan": "e7600f5cee5de14065f950807931d6e6d40fb2d7",
"versionType": "git"
},
{
"status": "affected",
"version": "ee141706e701356dda41c6fed9ee18bf427c28e3",
"versionType": "git"
},
{
"status": "affected",
"version": "4451412739ed33a49b34624299394ee575116d0c",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.239",
"lessThan": "5.10.270",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.186",
"lessThan": "5.15.221",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.142",
"lessThan": "6.1.188",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.95",
"lessThan": "6.6.157",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.35",
"lessThan": "6.12.109",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.295",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.15.4",
"lessThan": "6.16",
"versionType": "semver"
}
],
"programFiles": [
"drivers/media/v4l2-core/v4l2-dev.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/media/v4l2-core/v4l2-dev.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89741
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #35215 · Revision 1
- Added to Heist Feed
- Publisher date