CVE-2025-39997: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2025-39997DEBIAN-CVE-2025-39997
Published 15-10-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2025-39997 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 10.8% 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 18 · Related 18
OPENSUSE-SU-2025:15671-1OPENSUSE-SU-2025:20091-1OPENSUSE-SU-2026:10301-1SUSE-SU-2025:21040-1SUSE-SU-2025:21052-1SUSE-SU-2025:21056-1

Timeline

  1. 15-10-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: fix race condition to UAF in snd_usbmidi_free The previous commit 0718a78f6a9f ("ALSA: usb-audio: Kill timer properly at removal") patched a UAF issue caused by the error timer. However, because the error timer kill added in this patch occurs after the endpoint delete, a race condition to UAF still occurs, albeit rarely. Additionally, since kill-cleanup for urb is also missing, freed memory can be accessed in interrupt context related to urb, which can cause UAF. Therefore, to prevent this, error timer and urb must be killed before freeing the heap memory.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

0.00 pp

From 0.21% on 21-09-2026

21-09-202621-10-2026
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

Ubuntu97 products
  • linux< 6.17.0-6.6
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.17.0-1003.3
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.176-1 | < 6.16.11-1
Linux1 product
  • linux≥ 06513dd6d32c37d0364db8488cfdf3e14da238a8, < e63f049c7764b615d1d50cb486745fa63372b42d | ≥ efaf61052b8ff9ee8968912fbaf02c2847c78ede, < e16985513e89466a236d2a7c202783b4dd0c5a46 | ≥ 647410a7da46067953a53c0d03f8680eff570959, < dc4874366cf6cf4a31d8fa4b7f0e2a5b2d7647ba | ≥ c611b9e55174e439dcd85a72969b43a95f3827a4, < 647d6b8d22be12842fde6ed0c56859ebc615f21e | ≥ 0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1, < af600e7f5526d16146b3ae99f6ad57bfea79ca33 | ≥ 0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1, < 353d8c715cc951a980728133c9dd64ca5a0a186c | ≥ 0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1, < 9f2c0ac1423d5f267e7f1d1940780fc764b0fee3 | 62066758d2ae169278e5d6aea5995b1b6f6ddeb5 | ≥ 6.1.167, < 6.1.175 | ≥ 6.15.3, < 6.16 | 6.16

3 vendors · 99 products

References

12 links
Show all 12 references