CVE-2024-56712udmabuf: fix memory leak on last export_udmabuf() error path
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 3.3 LOW (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- Weakness (CWE)
- CWE-401
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 21, 2026
- First seen by InfoSec Signals
- Oct 21, 2026
Affected products
Linux Linux linux:linux (from the name) | from fbb0de795078190a9834b3409e4b009cfb18a6d4 before e469922fbdf6ad729e5dc8d49289b5036a0ecdf8; from fbb0de795078190a9834b3409e4b009cfb18a6d4 before c9fc8428d4255c2128da9c4d5cd92e554d0150cf; from fbb0de795078190a9834b3409e4b009cfb18a6d4 before f49856f525acd5bef52ae28b7da2e001bbe7439e | CNA record |
linux linux_kernel linux:linux_kernel | from 4.20 before 6.12.7; 6.13; 6.13; 6.13 | NVD |
References
- https://git.kernel.org/stable/c/e469922fbdf6ad729e5dc8d49289b5036a0ecdf8
- https://git.kernel.org/stable/c/c9fc8428d4255c2128da9c4d5cd92e554d0150cfpatch
- https://git.kernel.org/stable/c/f49856f525acd5bef52ae28b7da2e001bbe7439epatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.