CVE-2025-40223: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2025-40223DEBIAN-CVE-2025-40223
Published 04-12-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-40223 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.1% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 43 · Related 42
DLA-4404-1OPENSUSE-SU-2026:20145-1SUSE-SU-2026:0278-1SUSE-SU-2026:0281-1SUSE-SU-2026:0293-1SUSE-SU-2026:0315-1

Timeline

  1. 04-12-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: most: usb: Fix use-after-free in hdm_disconnect hdm_disconnect() calls most_deregister_interface(), which eventually unregisters the MOST interface device with device_unregister(iface->dev). If that drops the last reference, the device core may call release_mdev() immediately while hdm_disconnect() is still executing. The old code also freed several mdev-owned allocations in hdm_disconnect() and then performed additional put_device() calls. Depending on refcount order, this could lead to use-after-free or double-free when release_mdev() ran (or when unregister paths also performed puts). Fix by moving the frees of mdev-owned allocations into release_mdev(), so they happen exactly once when the device is truly released, and by dropping the extra put_device() calls in hdm_disconnect() that are redundant after device_unregister() and most_deregister_interface(). This addresses the KASAN slab-use-after-free reported by syzbot in hdm_disconnect(). See report and stack traces in the bug link below.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

0.00 pp

From 0.21% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.21%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu141 products
  • linux< 5.15.0-170.180 | < 6.8.0-106.106 | < 6.17.0-14.14
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1100.107 | < 6.8.0-1050.53 | < 6.17.0-1007.7
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.158-1 | < 6.12.57-1 | < 6.17.6-1
Linux1 product
  • linux≥ 97a6f772f36b7f52bcfa56a581bbd2470cffe23d, < 5b5c478f09b1b35e7fe6fc9a1786c9bf6030e831 | ≥ 97a6f772f36b7f52bcfa56a581bbd2470cffe23d, < 578eb18cd111addec94c43f61cd4b4429e454809 | ≥ 97a6f772f36b7f52bcfa56a581bbd2470cffe23d, < 33daf469f5294b9d07c4fc98216cace9f4f34cc6 | ≥ 97a6f772f36b7f52bcfa56a581bbd2470cffe23d, < 72427dc6f87523995f4e6ae35a948bb2992cabce | ≥ 97a6f772f36b7f52bcfa56a581bbd2470cffe23d, < f93a84ffb884d761a9d4e869ba29c238711e81f1 | ≥ 97a6f772f36b7f52bcfa56a581bbd2470cffe23d, < 3a3b8e89c7201c5b3b76ac4a4069d1adde1477d6 | ≥ 97a6f772f36b7f52bcfa56a581bbd2470cffe23d, < 4b1270902609ef0d935ed2faa2ea6d122bd148f5 | 5.9

3 vendors · 143 products

References

40 links
Show all 40 references