4.6

CVE-2026-31620: ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0

Analyzed
AliasesUBUNTU-CVE-2026-31620DEBIAN-CVE-2026-31620CGA-5pc5-45w2-xmgp
Published 24-04-2026Last modified 14-06-2026

Vulnerability summary

CVE-2026-31620 is a medium (CVSS 4.6) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 4.6, physical access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.6/10
010
Medium · v3.1 (NVD)
EPSS score
0.20%
0%100%
Low · -0.08 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 7
OPENSUSE-SU-2026:10703-1USN-8488-1USN-8488-2USN-8507-1USN-8569-1USN-8603-1

Timeline

  1. 24-04-2026
    PublishedVulnerability first disclosed.
  2. 14-06-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0 A malicious USB device with the TASCAM US-144MKII device id can have a configuration containing bInterfaceNumber=1 but no interface 0. USB configuration descriptors are not required to assign interface numbers sequentially, so usb_ifnum_to_if(dev, 0) returns will NULL, which will then be dereferenced directly. Fix this up by checking the return value properly.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

Decrease -0.08 pp

From 0.27% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: physical access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu98 products
  • linux< 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard6 products
  • linux-aws-6.18< 6.18.31-r0
  • linux-azure-6.18< 6.18.31-r0
  • linux-gcp-6.18< 6.18.31-r0
  • linux-qemu-6.18< 6.18.31-r0
  • linux-qemu-6.18-bootc-boot-installed< 6.18.31-r0
Linux2 products
  • linux≥ dee1bcf28a3dd13ddb2e9200407864f73e9c4d63, < 09b145c1f1331c40dc955c0024d636f25417cddb | ≥ dee1bcf28a3dd13ddb2e9200407864f73e9c4d63, < fbaf29ce00e7bce683f3faf4f2b326bd0a9e6602 | ≥ dee1bcf28a3dd13ddb2e9200407864f73e9c4d63, < d04dd67ab10dc978c6c843c6bd6a2a66a9444f51 | ≥ dee1bcf28a3dd13ddb2e9200407864f73e9c4d63, < 48bd344e1040b9f2eb512be73c13f5db83efc191 | 6.18
  • linux_kernel≥ 6.18, < 6.18.24 | ≥ 6.19, < 6.19.14 | ≥ 7.0, < 7.0.1
Debian1 product
  • linux< 6.19.14-1

4 vendors · 107 products

References

14 links
Show all 14 references