CVE-2024-56712 - Linux udmabuf Memory Leak Vulnerability

CVE-2024-56712 - Linux udmabuf Memory Leak Vulnerability

https://cvefeed.io/rssfeed/latest.atom / Sun, 12/29/2024 - 12:22
CVE ID : CVE-2024-56712
Published : Dec. 29, 2024, 9:15 a.m. | 2 hours, 7 minutes ago
Description : 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.
Severity: 0.0 | NA
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