5.5

CVE-2026-23228: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-23228DEBIAN-CVE-2026-23228
Published 18-02-2026Last modified 02-06-2026
Open JSON

Vulnerability summary

CVE-2026-23228 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 2.9% 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
0.14%
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 31 · Related 26
DLA-4499-1DSA-6141-1DSA-6163-1MGASA-2026-0097MGASA-2026-0098OPENSUSE-SU-2026:10387-1

Timeline

  1. 18-02-2026
    PublishedVulnerability first disclosed.
  2. 02-06-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection() On kthread_run() failure in ksmbd_tcp_new_connection(), the transport is freed via free_transport(), which does not decrement active_num_conn, leaking this counter. Replace free_transport() with ksmbd_tcp_disconnect().

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

+0.02 pp

From 0.12% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.14%

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

Ubuntu145 products
  • linux< 5.15.0-186.196 | < 6.8.0-134.134 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1060.63 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 4210c3555db4b38bade92331b153e583261f05f9, < 6dd2645cf080a75be31fa66063c7332b291f46f0 | ≥ d5d7847e57ac69fa99c18b363a34419bcdb5a281, < 7ddd69cd1338c6197e1b6b19cec60d99c8633e4f | ≥ 0d0d4680db22eda1eea785c47bbf66a9b33a8b16, < 787769c8cc50416af7b8b1a36e6bcd6aaa7680aa | ≥ 0d0d4680db22eda1eea785c47bbf66a9b33a8b16, < baf664fc90a6139a39a58333e4aaa390c10d45dc | ≥ 0d0d4680db22eda1eea785c47bbf66a9b33a8b16, < cd25e0d809531a67e9dd53b19012d27d2b13425f | ≥ 0d0d4680db22eda1eea785c47bbf66a9b33a8b16, < 599271110c35f6b16e2e4e45b9fbd47ed378c982 | ≥ 0d0d4680db22eda1eea785c47bbf66a9b33a8b16, < 77ffbcac4e569566d0092d5f22627dfc0896b553 | ≥ 5.15.91, < 5.15.201 | ≥ 6.1.9, < 6.1.164 | 6.2
  • linux_kernelEOL≥ 5.15.91, < 5.15.201 | ≥ 6.1.9, < 6.1.164 | ≥ 6.2.1, < 6.6.125 | ≥ 6.7, < 6.12.72 | ≥ 6.13, < 6.18.11 | ≥ 6.19, < 6.19.1 | 6.2 | 6.2:rc6 | 6.2:rc7 | 6.2:rc8
Debian1 product
  • linux< 6.1.164-1 | < 6.12.73-1 | < 6.18.12-1

3 vendors · 148 products

References

37 links
Show all 37 references