CVE-2025-21689

Advisory lineage Upstream: 0 Downstream: 48
Modified
Published: 10 Feb 2025, 15:58
Last modified:11 May 2026, 21:04

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (cve.org)
EPSS Score
0.2% LOW
0% probability +0.17%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

10 Feb 2025, 15:58
Published
Vulnerability first disclosed
11 May 2026, 21:04
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: USB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb() This patch addresses a null-ptr-deref in qt2_process_read_urb() due to an incorrect bounds check in the following: if (newport > serial->num_ports) { dev_err(&port->dev, "%s - port change to invalid port: %i\n", __func__, newport); break; } The condition doesn't account for the valid range of the serial->port buffer, which is from 0 to serial->num_ports - 1. When newport is equal to serial->num_ports, the assignment of "port" in the following code is out-of-bounds and NULL: serial_priv->current_port = newport; port = serial->port[serial_priv->current_port]; The fix checks if newport is greater than or equal to serial->num_ports indicating it is out-of-bounds.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.20%• Percentile: 10%

Techniques & Countermeasures

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • linux•linux

    ≥ f7a33e608d9ae022b7f49307921627e34e9484ed, < fa4c7472469d97c4707698b4c0e098f8cfc2bf22 | ≥ f7a33e608d9ae022b7f49307921627e34e9484ed, < 94770cf7c5124f0268d481886829dc2beecc4507 | ≥ f7a33e608d9ae022b7f49307921627e34e9484ed, < 6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe | ≥ f7a33e608d9ae022b7f49307921627e34e9484ed, < 4b9b41fabcd38990f69ef0cee9c631d954a2b530 | ≥ f7a33e608d9ae022b7f49307921627e34e9484ed, < 6377838560c03b36e1153a42ef727533def9b68f | ≥ f7a33e608d9ae022b7f49307921627e34e9484ed, < f371471708c7d997f763b0e70565026eb67cc470 | ≥ f7a33e608d9ae022b7f49307921627e34e9484ed, < 8542b33622571f54dfc2a267fce378b6e3840b8b | ≥ f7a33e608d9ae022b7f49307921627e34e9484ed, < 575a5adf48b06a2980c9eeffedf699ed5534fade | 3.5

  • linux•linux kernel

    ≥ 3.5, < 5.4.290 | ≥ 5.5, < 5.10.234 | ≥ 5.11, < 5.15.178 | ≥ 5.16, < 6.1.128 | ≥ 6.2, < 6.6.75 | ≥ 6.7, < 6.12.12 | 6.13 | 6.13:rc1 | 6.13:rc2 | 6.13:rc3 | 6.13:rc4 | 6.13:rc5 | 6.13:rc6 | 6.13:rc7

References (10)