CVE-2022-50499
N/A
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 9db28659aa893c68f162b11fd63bb7f6a713e52f < 0588b12c418c3e4f927ced11f27b02ef4a5bfb07 | affected |
| Linux | Linux | 1399a136127bfe1b9bb7c951d9851da62a519121 < e9a78485b658361fab6a5547377be6c1af6f1b3d | affected |
| Linux | Linux | 4df2427a5148093987437054bb82da4d014dcd59 < 70bc51303871159796b55ba1a8f16637b46c2511 | affected |
| Linux | Linux | fcd5ce4b3936242e6679875a4d3c3acfc8743e15 < b21f62b49ee9c3e0216d685d9cfd6003e5727271 | affected |
| Linux | Linux | fcd5ce4b3936242e6679875a4d3c3acfc8743e15 < 7dd5a68cdbbbe7fc67ba701cb52ba10d8ba149f8 | affected |
| Linux | Linux | fcd5ce4b3936242e6679875a4d3c3acfc8743e15 < acf984a3718c2458eb9e08b6714490a04f213c58 | affected |
| Linux | Linux | fcd5ce4b3936242e6679875a4d3c3acfc8743e15 < 772892b29ac50c2c5e918fc80104aa6ede81d837 | affected |
| Linux | Linux | fcd5ce4b3936242e6679875a4d3c3acfc8743e15 < 123eddf92a114e03919942641d2c2b1f4ca56ea6 | affected |
| Linux | Linux | fcd5ce4b3936242e6679875a4d3c3acfc8743e15 < 6b0d0477fce747d4137aa65856318b55fba72198 | affected |
| Linux | Linux | 8c17f6f5d0d6aab72a2af25c9911ac66e984be06 | affected |
| Linux | Linux | 202be5d6e46f682b9d1d79cd4dc6ab726e62ef1c | affected |
| Linux | Linux | 4.9.195 < 4.9.337 | affected |
| Linux | Linux | 4.14.147 < 4.14.303 | affected |
| Linux | Linux | 4.19.77 < 4.19.270 | affected |
| Linux | Linux | 5.2.19 < 5.3 | affected |
| Linux | Linux | 5.3.4 < 5.4 | affected |
| Linux | Linux | 5.4 | affected |
| Linux | Linux | 0 < 5.4 | unaffected |
| Linux | Linux | 4.9.337 <= 4.9.* | unaffected |
| Linux | Linux | 4.14.303 <= 4.14.* | unaffected |
| Linux | Linux | 4.19.270 <= 4.19.* | unaffected |
| Linux | Linux | 5.4.229 <= 5.4.* | unaffected |
| Linux | Linux | 5.10.163 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.87 <= 5.15.* | unaffected |
| Linux | Linux | 6.0.18 <= 6.0.* | unaffected |
| Linux | Linux | 6.1.4 <= 6.1.* | unaffected |
| Linux | Linux | 6.2 <= * | unaffected |
Weaknesses
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
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