Skip to content
CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-89741

Revert "media: v4l2-dev: fix error handling in __video_register_device()"

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • e5c8e62ae551e0ad2e15412aa0c57c2856d59677 to < 8b998c171ed875e402e1fd1c5cd619e4ca05e9c1affected
  • 8b451a9a46f2bfc510e6d5c2492df91647586184 to < 3de14b4f681a1b3c6d375d98d9d37a55ebb85349affected
  • b6be1f5633eae200af2527e9eeb7f51be5739b0f to < 8027f82c0f5474ed72448e160ee9778051fa1f49affected
  • ae7b143e05b36fc69d6571751855946cc45064c6 to < 2ac009a65d2385e9f0799eaf9d9694a29153a161affected
  • 2429bb9fad88c8fa84c4956b0a21cf5afe5e92b7 to < 712ca1cf756de2557a116e0df55791bac0c9f99eaffected
  • 2a934fdb01db6458288fc9386d3d8ceba6dd551a to < aad08b5f67d2a8116e1a00bce2611c1513b10bceaffected
  • 2a934fdb01db6458288fc9386d3d8ceba6dd551a to < ce792b94e03882108019ba996c1a7c4d4e09be2caffected
  • 2a934fdb01db6458288fc9386d3d8ceba6dd551a to < e7600f5cee5de14065f950807931d6e6d40fb2d7affected
  • ee141706e701356dda41c6fed9ee18bf427c28e3affected
  • 4451412739ed33a49b34624299394ee575116d0caffected
  • 5.10.239 to < 5.10.270affected
  • 5.15.186 to < 5.15.221affected
  • 6.1.142 to < 6.1.188affected
  • 6.6.95 to < 6.6.157affected
  • 6.12.35 to < 6.12.109affected
  • 5.4.295 to < 5.5affected
  • 6.15.4 to < 6.16affected

Linux Linux

Default version status: affected

  • 6.16affected
  • 0 to < 6.16unaffected
  • 5.10.270 to ≤ 5.10.*unaffected
  • 5.15.221 to ≤ 5.15.*unaffected
  • 6.1.188 to ≤ 6.1.*unaffected
  • 6.6.157 to ≤ 6.6.*unaffected
  • 6.12.109 to ≤ 6.12.*unaffected
  • 6.18.50 to ≤ 6.18.*unaffected
  • 7.2.4 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References