CVE-2025-40275: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2025-40275DEBIAN-CVE-2025-40275
Published 06-12-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-40275 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.6% 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
0.19%
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 39
DLA-4404-1DLA-4436-1MGASA-2026-0017MGASA-2026-0018OPENSUSE-SU-2026:20145-1SUSE-SU-2026:0278-1

Timeline

  1. 06-12-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix NULL pointer dereference in snd_usb_mixer_controls_badd In snd_usb_create_streams(), for UAC version 3 devices, the Interface Association Descriptor (IAD) is retrieved via usb_ifnum_to_if(). If this call fails, a fallback routine attempts to obtain the IAD from the next interface and sets a BADD profile. However, snd_usb_mixer_controls_badd() assumes that the IAD retrieved from usb_ifnum_to_if() is always valid, without performing a NULL check. This can lead to a NULL pointer dereference when usb_ifnum_to_if() fails to find the interface descriptor. This patch adds a NULL pointer check after calling usb_ifnum_to_if() in snd_usb_mixer_controls_badd() to prevent the dereference. This issue was discovered by syzkaller, which triggered the bug by sending a crafted USB device descriptor.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.19% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.19%

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

Ubuntu149 products
  • linuxAll versions (No fix recorded) | < 5.15.0-173.183 | < 6.8.0-106.106 | < 6.17.0-14.14
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1103.110 | < 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< 6.1.159-1 | < 6.12.63-1 | < 6.17.9-1
Linux1 product
  • linux≥ 17156f23e93c0f59e06dd2aaffd06221341caaee, < 23aea9c74aeea2625aaf4fbcc6beb9d09e30f9e4 | ≥ 17156f23e93c0f59e06dd2aaffd06221341caaee, < c5c08965ab96b16361e69a1e2a0e89dbcb99b5a6 | ≥ 17156f23e93c0f59e06dd2aaffd06221341caaee, < 9f282104627be5fbded3102ff9004f753c55a063 | ≥ 17156f23e93c0f59e06dd2aaffd06221341caaee, < 2762d3ea9c929ca4094541ca517c317ffa94625b | ≥ 17156f23e93c0f59e06dd2aaffd06221341caaee, < 57f607c112966c21240c424b33e2cb71e121dcf0 | ≥ 17156f23e93c0f59e06dd2aaffd06221341caaee, < cbdbfc756f2990942138ed0138da9303b4dbf9ff | ≥ 17156f23e93c0f59e06dd2aaffd06221341caaee, < 85568535893600024d7d8794f4f8b6428b521e0c | ≥ 17156f23e93c0f59e06dd2aaffd06221341caaee, < 632108ec072ad64c8c83db6e16a7efee29ebfb74 | 4.18

3 vendors · 151 products

References

38 links
Show all 38 references