5.5

CVE-2026-23021: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-23021DEBIAN-CVE-2026-23021
Published 31-01-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-23021 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 6.6% 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
0.18%
0%100%
Low · +0.02 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 35
DLA-4475-1DLA-4476-1DSA-6126-1DSA-6127-1MGASA-2026-0097MGASA-2026-0098

Timeline

  1. 31-01-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: usb: pegasus: fix memory leak in update_eth_regs_async() When asynchronously writing to the device registers and if usb_submit_urb() fail, the code fail to release allocated to this point resources.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

+0.02 pp

From 0.16% on 22-09-2026

22-09-202622-10-2026
EPSS score
0.18%

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

Ubuntu156 products
  • linuxAll versions (No fix recorded) | < 5.15.0-173.183 | < 6.8.0-117.117
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1103.110 | < 6.8.0-1055.58
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 323b34963d113efb566635f43858f40cce01d5f9, < 5397ea6d21c35a17707e201a60761bdee00bcc4e | ≥ 323b34963d113efb566635f43858f40cce01d5f9, < a40af9a2904a1ab8ce61866ebe2a894ef30754ba | ≥ 323b34963d113efb566635f43858f40cce01d5f9, < ac5d92d2826dec51e5d4c6854865bc5817277452 | ≥ 323b34963d113efb566635f43858f40cce01d5f9, < 93f18eaa190374e0f2d253e3b1a65cee19a7abe6 | ≥ 323b34963d113efb566635f43858f40cce01d5f9, < 471dfb97599eec74e0476046b3ef8e7037f27b34 | ≥ 323b34963d113efb566635f43858f40cce01d5f9, < ce6eef731aba23a988decea1df3b08cf978f7b01 | ≥ 323b34963d113efb566635f43858f40cce01d5f9, < afa27621a28af317523e0836dad430bec551eb54 | 3.10
  • linux_kernel≥ 3.10.1, < 5.10.248 | ≥ 5.11, < 5.15.198 | ≥ 5.16, < 6.1.161 | ≥ 6.2, < 6.6.121 | ≥ 6.7, < 6.12.66 | ≥ 6.13, < 6.18.6 | 3.10 | 6.19:rc1 | 6.19:rc2 | 6.19:rc3 | 6.19:rc4 | 6.19:rc5 | 6.19:rc6 | 6.19:rc7 | 6.19:rc8
Debian1 product
  • linux< 6.1.162-1 | < 6.12.69-1 | < 6.18.8-1

3 vendors · 159 products

References

37 links
Show all 37 references