CVE-2022-50499
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.16% probability · 6th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-415
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0588b12c418c3e4f927ced11f27b02ef4a5bfb07Patch
- https://git.kernel.org/stable/c/123eddf92a114e03919942641d2c2b1f4ca56ea6Patch
- https://git.kernel.org/stable/c/6b0d0477fce747d4137aa65856318b55fba72198Patch
- https://git.kernel.org/stable/c/70bc51303871159796b55ba1a8f16637b46c2511Patch
- https://git.kernel.org/stable/c/772892b29ac50c2c5e918fc80104aa6ede81d837Patch
- https://git.kernel.org/stable/c/7dd5a68cdbbbe7fc67ba701cb52ba10d8ba149f8Patch
- https://git.kernel.org/stable/c/acf984a3718c2458eb9e08b6714490a04f213c58Patch
- https://git.kernel.org/stable/c/b21f62b49ee9c3e0216d685d9cfd6003e5727271Patch
- https://git.kernel.org/stable/c/e9a78485b658361fab6a5547377be6c1af6f1b3dPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.