# CVE-2023-52907: linux: In the Linux kernel, the following vulnerability has been resolved:  nfc: pn533: Wait for out_urb's completion in pn5...

CVE-2023-52907 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52907, released August 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-52907
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 21, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  nfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame()  Fix a use-after-free that occurs in hcd when in_urb sent from pn533_usb_send_frame() is completed earlier than out_urb. Its callback frees the skb data in pn533_send_async_complete() that is used as a transfer buffer of out_urb. Wait before sending in_urb until the callback of out_urb is called. To modify the callback of out_urb alone, separate the complete function of out_urb and ack_urb.  Found by a modified version of syzkaller.  BUG: KASAN: use-after-free in dummy_timer Call Trace:  memcpy (mm/kasan/shadow.c:65)  dummy_perform_transfer (drivers/usb/gadget/udc/dummy_hcd.c:1352)  transfer (drivers/usb/gadget/udc/dummy_hcd.c:1453)  dummy_timer (drivers/usb/gadget/udc/dummy_hcd.c:1972)  arch_static_branch (arch/x86/include/asm/jump_label.h:27)  static_key_false (include/linux/jump_label.h:207)  timer_expire_exit (include/trace/events/timer.h:127)  call_timer_fn (kernel/time/timer.c:1475)  expire_timers (kernel/time/timer.c:1519)  __run_timers (kernel/time/timer.c:1790)  run_timer_softirq (kernel/time/timer.c:1803)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.7-1 | [DEBIAN-CVE-2023-52907](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52907.md) | Aug 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.1.7-1 | [DEBIAN-CVE-2023-52907](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52907.md) | Aug 21, 2024 |
| Linux | linux Debian 14 | 6.1.7-1 | [DEBIAN-CVE-2023-52907](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52907.md) | Aug 21, 2024 |

---

Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.