Answer in brief
CVE-2024-56712 records a Low severity (CVSS 3.3) vulnerability in udmabuf: fix memory leak on last export_udmabuf() error path. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 3.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=fbb0de795078190a9834b3409e4b009cfb18a6d4 <e469922fbdf6ad729e5dc8d49289b5036a0ecdf8 || >=fbb0de795078190a9834b3409e4b009cfb18a6d4 <c9fc8428d4255c2128da9c4d5cd92e554d0150cf || >=fbb0de795078190a9834b3409e4b009cfb18a6d4 <f49856f525acd5bef52ae28b7da2e001bbe7439e | e469922fbdf6ad729e5dc8d49289b5036a0ecdf8, c9fc8428d4255c2128da9c4d5cd92e554d0150cf, f49856f525acd5bef52ae28b7da2e001bbe7439e |
| Linux/Linuxgeneric | 4.20 | Not reported |
Published upstream
Dec 29, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 21, 2026
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.
Quoted source text, attributed separately from HOL analysis.