CVE-2026-64328
CVE CVE-2026-64328EUVD EUVD-2026-48872Published 2026-07-25T08:49:56.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: Fix DMA fence leak In ffs_dmabuf_transfer(), a ffs_dma_fence object is kmalloc'd, with the underlying dma_fence later initialized by dma_fence_init(), which sets its kref counter to 1. Then, dma_resv_add_fence() gets a second reference, and a pointer to the ffs_dma_fence is passed as the usb_request's "context" field. The dma-resv mechanism will manage the second reference, but the first reference is never properly released; the ffs_dmabuf_cleanup() function decreases the reference count, but only to balance with the reference grab in ffs_dmabuf_signal_done(). The code will then slowly leak memory as more ffs_dma_fence objects are created without being ever freed. Address this issue by transferring ownership of the fence to the DMA reservation object, by calling dma_fence_put() right after dma_resv_add_fence(). The ffs_dma_fence then gets properly discarded after being signalled.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 7b07a2a7ca02a20124b552be96c5a56910795488 <b7475b2dce5e121e687280ba5732ccefe77ffd2f; 7b07a2a7ca02a20124b552be96c5a56910795488 <0cae3d6109427c455bad0a18dfb3e2a91657e38a; patch: 6.18.39; 7b07a2a7ca02a20124b552be96c5a56910795488 <baa6b6068a3f2bf2ed525a1cb37975905dadc658; patch: 7.2-rc3; 7b07a2a7ca02a20124b552be96c5a56910795488 <e086c16962a1b0142e2675610e9c06fcfcd4c3a8; 6.9; patch: 0; patch: 7.1.4; patch: 6.12.96
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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