usb: gadget: f_fs: Fix fence cleanup in ffs_dmabuf_transfer() error paths

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-93121
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:18:06 UTC
Updated2026-09-17 17:18:06 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: Fix fence cleanup in ffs_dmabuf_transfer() error paths The error paths for endpoint-disabled (ESHUTDOWN) and request-allocation failure (ENOMEM) in ffs_dmabuf_transfer() jump to err_fence_put which calls dma_fence_put() on the fence. However, at that point the fence has only been kmalloc'd — dma_fence_init() has not been called yet, so the refcount and the fence ops are uninitialized. Calling dma_fence_put() on such an object leads to undefined behavior. Use kfree() instead, since the fence is just a plain allocation at this stage, and rename the label to err_fence_free to reflect the actual cleanup action.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7b07a2a7ca02a20124b552be96c5a56910795488 be539138d9a187af3b884525a395db10797c64f1 git Not specified
CNA Linux Linux affected 7b07a2a7ca02a20124b552be96c5a56910795488 5fd8baacc7dc477df9cac61b45491840247a9b1e git Not specified
CNA Linux Linux affected 7b07a2a7ca02a20124b552be96c5a56910795488 58952c83dfe6ea3294a74734d2d1018c1120779a git Not specified
CNA Linux Linux affected 7b07a2a7ca02a20124b552be96c5a56910795488 621707dc67c9846fd876d7579ec951d92aa033f1 git Not specified
CNA Linux Linux affected 6.9 Not specified
CNA Linux Linux unaffected 6.9 semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/621707dc67c9846fd876d7579ec951d92aa033f1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/be539138d9a187af3b884525a395db10797c64f1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5fd8baacc7dc477df9cac61b45491840247a9b1e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/58952c83dfe6ea3294a74734d2d1018c1120779a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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