Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 9db28659aa893c68f162b11fd63bb7f6a713e52f before 0588b12c418c3e4f927ced11f27b02ef4a5bfb07; affected 1399a136127bfe1b9bb7c951d9851da62a519121 before e9a78485b658361fab6a5547377be6c1af6f1b3d; affected 4df2427a5148093987437054bb82da4d014dcd59 before 70bc51303871159796b55ba1a8f16637b46c2511; affected fcd5ce4b3936242e6679875a4d3c3acfc8743e15 before b21f62b49ee9c3e0216d685d9cfd6003e5727271; affected fcd5ce4b3936242e6679875a4d3c3acfc8743e15 before 7dd5a68cdbbbe7fc67ba701cb52ba10d8ba149f8; affected fcd5ce4b3936242e6679875a4d3c3acfc8743e15 before acf984a3718c2458eb9e08b6714490a04f213c58; affected fcd5ce4b3936242e6679875a4d3c3acfc8743e15 before 772892b29ac50c2c5e918fc80104aa6ede81d837; affected fcd5ce4b3936242e6679875a4d3c3acfc8743e15 before 123eddf92a114e03919942641d2c2b1f4ca56ea6; affected fcd5ce4b3936242e6679875a4d3c3acfc8743e15 before 6b0d0477fce747d4137aa65856318b55fba72198; affected 8c17f6f5d0d6aab72a2af25c9911ac66e984be06; affected 202be5d6e46f682b9d1d79cd4dc6ab726e62ef1c; affected 4.9.195 before 4.9.337; affected 4.14.147 before 4.14.303; affected 4.19.77 before 4.19.270; affected 5.2.19 before 5.3; affected 5.3.4 before 5.4 |
| Linux / Linux | affected 5.4; unaffected 0 before 5.4; unaffected 4.9.337 through 4.9.*; unaffected 4.14.303 through 4.14.*; unaffected 4.19.270 through 4.19.*; unaffected 5.4.229 through 5.4.*; unaffected 5.10.163 through 5.10.*; unaffected 5.15.87 through 5.15.*; unaffected 6.0.18 through 6.0.*; unaffected 6.1.4 through 6.1.*; unaffected 6.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/0588b12c418c3e4f927ced11f27b02ef4a5bfb07
- https://git.kernel.org/stable/c/e9a78485b658361fab6a5547377be6c1af6f1b3d
- https://git.kernel.org/stable/c/70bc51303871159796b55ba1a8f16637b46c2511
- https://git.kernel.org/stable/c/b21f62b49ee9c3e0216d685d9cfd6003e5727271
- https://git.kernel.org/stable/c/7dd5a68cdbbbe7fc67ba701cb52ba10d8ba149f8
- https://git.kernel.org/stable/c/acf984a3718c2458eb9e08b6714490a04f213c58
- https://git.kernel.org/stable/c/772892b29ac50c2c5e918fc80104aa6ede81d837
- https://git.kernel.org/stable/c/123eddf92a114e03919942641d2c2b1f4ca56ea6
- https://git.kernel.org/stable/c/6b0d0477fce747d4137aa65856318b55fba72198