# CVE-2024-26749: linux: In the Linux kernel, the following vulnerability has been resolved:  usb: cdns3: fixed memory use after free at cdns3...

CVE-2024-26749 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-26749, released April 3, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2024-26749
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 3, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  usb: cdns3: fixed memory use after free at cdns3_gadget_ep_disable()    ...   cdns3_gadget_ep_free_request(&priv_ep->endpoint, &priv_req->request);   list_del_init(&priv_req->list);   ...  'priv_req' actually free at cdns3_gadget_ep_free_request(). But list_del_init() use priv_req->list after it.  [ 1542.642868][  T534] BUG: KFENCE: use-after-free read in __list_del_entry_valid+0x10/0xd4 [ 1542.642868][  T534] [ 1542.653162][  T534] Use-after-free read at 0x000000009ed0ba99 (in kfence-#3): [ 1542.660311][  T534]  __list_del_entry_valid+0x10/0xd4 [ 1542.665375][  T534]  cdns3_gadget_ep_disable+0x1f8/0x388 [cdns3] [ 1542.671571][  T534]  usb_ep_disable+0x44/0xe4 [ 1542.675948][  T534]  ffs_func_eps_disable+0x64/0xc8 [ 1542.680839][  T534]  ffs_func_set_alt+0x74/0x368 [ 1542.685478][  T534]  ffs_func_disable+0x18/0x28  Move list_del_init() before cdns3_gadget_ep_free_request() to resolve this problem.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.82-1 | [DEBIAN-CVE-2024-26749](https://patchblox.com/security/data/fix/linux/debian-cve-2024-26749.md) | Apr 3, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.7.7-1 | [DEBIAN-CVE-2024-26749](https://patchblox.com/security/data/fix/linux/debian-cve-2024-26749.md) | Apr 3, 2024 |
| Linux | linux Debian 14 | 6.7.7-1 | [DEBIAN-CVE-2024-26749](https://patchblox.com/security/data/fix/linux/debian-cve-2024-26749.md) | Apr 3, 2024 |

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