Riskcovery

CVE-2022-50499

media: dvb-core: Fix double free in dvb_register_device()

State
Published
Severity
Not scored
Published
Oct 4, 2025
Updated
May 23, 2026
Reserved
Oct 4, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

media: dvb-core: Fix double free in dvb_register_device()

In function dvb_register_device() -> dvb_register_media_device() -> dvb_create_media_entity(), dvb->entity is allocated and initialized. If the initialization fails, it frees the dvb->entity, and return an error code. The caller takes the error code and handles the error by calling dvb_media_device_free(), which unregisters the entity and frees the field again if it is not NULL. As dvb->entity may not NULLed in dvb_create_media_entity() when the allocation of dvbdev->pad fails, a double free may occur. This may also cause an Use After free in media_device_unregister_entity().

Fix this by storing NULL to dvb->entity when it is freed.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 9db28659aa893c68f162b11fd63bb7f6a713e52f to before 0588b12c418c3e4f927ced11f27b02ef4a5bfb07Affected
  • 1399a136127bfe1b9bb7c951d9851da62a519121 to before e9a78485b658361fab6a5547377be6c1af6f1b3dAffected
  • 4df2427a5148093987437054bb82da4d014dcd59 to before 70bc51303871159796b55ba1a8f16637b46c2511Affected
  • fcd5ce4b3936242e6679875a4d3c3acfc8743e15 to before b21f62b49ee9c3e0216d685d9cfd6003e5727271Affected
  • fcd5ce4b3936242e6679875a4d3c3acfc8743e15 to before 7dd5a68cdbbbe7fc67ba701cb52ba10d8ba149f8Affected
  • fcd5ce4b3936242e6679875a4d3c3acfc8743e15 to before acf984a3718c2458eb9e08b6714490a04f213c58Affected
  • fcd5ce4b3936242e6679875a4d3c3acfc8743e15 to before 772892b29ac50c2c5e918fc80104aa6ede81d837Affected
  • fcd5ce4b3936242e6679875a4d3c3acfc8743e15 to before 123eddf92a114e03919942641d2c2b1f4ca56ea6Affected
  • fcd5ce4b3936242e6679875a4d3c3acfc8743e15 to before 6b0d0477fce747d4137aa65856318b55fba72198Affected
  • 8c17f6f5d0d6aab72a2af25c9911ac66e984be06Affected
  • 202be5d6e46f682b9d1d79cd4dc6ab726e62ef1cAffected
  • 4.9.195 to before 4.9.337Affected
  • 4.14.147 to before 4.14.303Affected
  • 4.19.77 to before 4.19.270Affected
  • 5.2.19 to before 5.3Affected
  • 5.3.4 to before 5.4Affected
LinuxLinux
  • 5.4Affected
  • before 5.4Not affected
  • 4.9.337 through 4.9.*Not affected
  • 4.14.303 through 4.14.*Not affected
  • 4.19.270 through 4.19.*Not affected
  • 5.4.229 through 5.4.*Not affected
  • 5.10.163 through 5.10.*Not affected
  • 5.15.87 through 5.15.*Not affected
  • 6.0.18 through 6.0.*Not affected
  • 6.1.4 through 6.1.*Not affected
  • 6.2 and laterNot affected

References

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