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CVE PROGRAM SOURCE RECORDUnscored

CVE-2022-50499

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

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Status
Published
Published
Updated
Assigning organization
Linux

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.

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

  • 9db28659aa893c68f162b11fd63bb7f6a713e52f to < 0588b12c418c3e4f927ced11f27b02ef4a5bfb07affected
  • 1399a136127bfe1b9bb7c951d9851da62a519121 to < e9a78485b658361fab6a5547377be6c1af6f1b3daffected
  • 4df2427a5148093987437054bb82da4d014dcd59 to < 70bc51303871159796b55ba1a8f16637b46c2511affected
  • fcd5ce4b3936242e6679875a4d3c3acfc8743e15 to < b21f62b49ee9c3e0216d685d9cfd6003e5727271affected
  • fcd5ce4b3936242e6679875a4d3c3acfc8743e15 to < 7dd5a68cdbbbe7fc67ba701cb52ba10d8ba149f8affected
  • fcd5ce4b3936242e6679875a4d3c3acfc8743e15 to < acf984a3718c2458eb9e08b6714490a04f213c58affected
  • fcd5ce4b3936242e6679875a4d3c3acfc8743e15 to < 772892b29ac50c2c5e918fc80104aa6ede81d837affected
  • fcd5ce4b3936242e6679875a4d3c3acfc8743e15 to < 123eddf92a114e03919942641d2c2b1f4ca56ea6affected
  • fcd5ce4b3936242e6679875a4d3c3acfc8743e15 to < 6b0d0477fce747d4137aa65856318b55fba72198affected
  • 8c17f6f5d0d6aab72a2af25c9911ac66e984be06affected
  • 202be5d6e46f682b9d1d79cd4dc6ab726e62ef1caffected
  • 4.9.195 to < 4.9.337affected
  • 4.14.147 to < 4.14.303affected
  • 4.19.77 to < 4.19.270affected
  • 5.2.19 to < 5.3affected
  • 5.3.4 to < 5.4affected

Linux Linux

Default version status: affected

  • 5.4affected
  • 0 to < 5.4unaffected
  • 4.9.337 to ≤ 4.9.*unaffected
  • 4.14.303 to ≤ 4.14.*unaffected
  • 4.19.270 to ≤ 4.19.*unaffected
  • 5.4.229 to ≤ 5.4.*unaffected
  • 5.10.163 to ≤ 5.10.*unaffected
  • 5.15.87 to ≤ 5.15.*unaffected
  • 6.0.18 to ≤ 6.0.*unaffected
  • 6.1.4 to ≤ 6.1.*unaffected
  • 6.2 to ≤ *unaffected

References