5.5

CVE-2026-31755: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-31755DEBIAN-CVE-2026-31755
Published 01-05-2026Last modified 04-07-2026
Open JSON

Vulnerability summary

CVE-2026-31755 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.16%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 41 · Related 39
MGASA-2026-0108MGASA-2026-0110OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1

Timeline

  1. 01-05-2026
    PublishedVulnerability first disclosed.
  2. 04-07-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: gadget: fix NULL pointer dereference in ep_queue When the gadget endpoint is disabled or not yet configured, the ep->desc pointer can be NULL. This leads to a NULL pointer dereference when __cdns3_gadget_ep_queue() is called, causing a kernel crash. Add a check to return -ESHUTDOWN if ep->desc is NULL, which is the standard return code for unconfigured endpoints. This prevents potential crashes when ep_queue is called on endpoints that are not ready.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

+0.04 pp

From 0.12% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.16%

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

Affected systems

Ubuntu153 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < 3cf0580a09d417eab41ce914a11f9cde3a121871 | ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < 3d1433fe34b224b90259e207e5389e95b504ef04 | ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < fb2ad0c1334a3eccfe4ed203f9eef5a4879226f6 | ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < 9ab9b0e5fcdac325f950fc8b6caa08a9e22a0db9 | ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < d61446dfc9d387775bb1b95b081953201b9222af | ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < 390536cc6af4ca5566bc3bf1f8b704700380cd2c | ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < 14bf08ab2cdfcdfd3f13e799d06692a1b3e0745f | ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < 7f6f127b9bc34bed35f56faf7ecb1561d6b39000 | 5.4
  • linux_kernel≥ 5.4, < 5.15.203 | ≥ 5.16, < 6.1.168 | ≥ 6.2, < 6.6.134 | ≥ 6.7, < 6.12.81 | ≥ 6.13, < 6.18.22 | ≥ 6.19, < 6.19.12 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.12-1

3 vendors · 156 products

References

39 links
Show all 39 references