5.5

CVE-2026-23298: linux Infinite Loop

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-23298DEBIAN-CVE-2026-23298
Published 25-03-2026Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2026-23298 is a medium (CVSS 5.5) Infinite Loop vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.8% 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
0.12%
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 31 · Related 29
MGASA-2026-0097MGASA-2026-0098SUSE-SU-2026:21834-1SUSE-SU-2026:2238-1USN-8567-1USN-8574-1

Timeline

  1. 25-03-2026
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: can: ucan: Fix infinite loop from zero-length messages If a broken ucan device gets a message with the message length field set to 0, then the driver will loop for forever in ucan_read_bulk_callback(), hanging the system. If the length is 0, just skip the message and go on to the next one. This has been fixed in the kvaser_usb driver in the past in commit 0c73772cd2b8 ("can: kvaser_usb: leaf: Fix potential infinite loop in command parsers"), so there must be some broken devices out there like this somewhere.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.12%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.12% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.12%

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≥ 9f2d3eae88d26c29d96e42983b755940d9169cd9, < ca07d3c6eef14d34e6fdeefe55058db045be29dc | ≥ 9f2d3eae88d26c29d96e42983b755940d9169cd9, < e7bb6e0606b5f233531aaaad9542d69fbb792115 | ≥ 9f2d3eae88d26c29d96e42983b755940d9169cd9, < ab6f075492d37368b4c7b0df7f7fdc2b666887fc | ≥ 9f2d3eae88d26c29d96e42983b755940d9169cd9, < 13b646eec3ba1131180803f5aaf1fee23540ad8f | ≥ 9f2d3eae88d26c29d96e42983b755940d9169cd9, < bd85f21a6219aeae4389d700c54f1799f4b814e0 | ≥ 9f2d3eae88d26c29d96e42983b755940d9169cd9, < aa9e0a7fe5efc2f74327fd37d828e9a51d9ff588 | ≥ 9f2d3eae88d26c29d96e42983b755940d9169cd9, < c7bc62be6c1a60bb21301692009590b1ffda91d9 | ≥ 9f2d3eae88d26c29d96e42983b755940d9169cd9, < 1e446fd0582ad8be9f6dafb115fc2e7245f9bea7 | 4.19
  • linux_kernel≥ 4.19, < 5.10.253 | ≥ 5.11, < 5.15.203 | ≥ 5.16, < 6.1.167 | ≥ 6.2, < 6.6.130 | ≥ 6.7, < 6.12.77 | ≥ 6.13, < 6.18.17 | ≥ 6.19, < 6.19.7 | 7.0:rc1 | 7.0:rc2
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.8-1

3 vendors · 156 products

References

40 links
Show all 40 references