CVE-2023-52907

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2024-08-21. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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)

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

August 21, 2024

Last Modified

August 5, 2026

Advisory Details (7)

Auto-updated Aug 5, 2026
No patch confirmed yet.
generic

nfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9dab880d675b9d0dd56c6428e4e8352a3339371d
generic

nfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8998db5021a28ad67aa8d627bdb4226e4046ccc4
generic

nfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/39ae73e581112cfe27ba50aecb1c891ce57cecb1
generic

nfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0ca78c99656f5c448567db1e148367aa3b01c80a
generic

nfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9424d2205fe94a095fb9365ec0c6137f0b394a2b
generic

nfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/321db5131c92983dac4f3338e8fbb6df214238c0
generic

nfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/35529d6b827eedb6bf7e81130e4b7e0aba9e58d2

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 4.14.303—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 119 total refreshes for this CVE.

  1. 2026-08-07 16:25 UTCEPSS rescore
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  4. 2026-08-05 10:23 UTCEG score recompute
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Frequently asked(5)

What is CVE-2023-52907?
CVE-2023-52907 is a medium vulnerability published on August 21, 2024. In the Linux kernel, the following vulnerability has been resolved: nfc: pn533: Wait for outurb's completion in pn533usbsendframe() Fix a use-after-free that occurs in hcd when in_urb sent from pn533usbsendframe() is completed earlier than outurb. Its callback frees the skb data in…
When was CVE-2023-52907 disclosed?
CVE-2023-52907 was first published in the National Vulnerability Database on August 21, 2024, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-52907 actively exploited?
CVE-2023-52907 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 84.6% of all scored CVEs.
What is the CVSS score of CVE-2023-52907?
CVE-2023-52907 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2023-52907?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-52907, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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