CVE-2024-56712

In the Linux kernel, the following vulnerability has been resolved: udmabuf: fix memory leak on last export_udmabuf() error path In export_udmabuf(), if dma_buf_fd() fails because the FD table is full, a dma_buf owning the udmabuf has already been created; but the error handling in udmabuf_create() will tear down the udmabuf without doing anything about the containing dma_buf. This leaves a dma_buf in memory that contains a dangling pointer; though that doesn't seem to lead to anything bad except a memory leak. Fix it by moving the dma_buf_fd() call out of export_udmabuf() so that we can give it different error handling. Note that the shape of this code changed a lot in commit 5e72b2b41a21 ("udmabuf: convert udmabuf driver to use folios"); but the memory leak seems to have existed since the introduction of udmabuf.

The following products are affected by CVE-2024-56712 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2024-56712.

URL	Resource
https://git.kernel.org/stable/c/c9fc8428d4255c2128da9c4d5cd92e554d0150cf
https://git.kernel.org/stable/c/f49856f525acd5bef52ae28b7da2e001bbe7439e
https://lore.kernel.org/linux-cve-announce/2024122914-CVE-2024-56712-d62a@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2024-56712
https://www.cve.org/CVERecord?id=CVE-2024-56712