Executive Summary



This vulnerability is currently undergoing analysis and not all information is available. Please check back soon to view the completed vulnerability summary
Informations
Name CVE-2025-38193 First vendor Publication 2025-07-04
Vendor Cve Last vendor Modification 2025-07-04

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
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Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

In the Linux kernel, the following vulnerability has been resolved:

net_sched: sch_sfq: reject invalid perturb period

Gerrard Tai reported that SFQ perturb_period has no range check yet, and this can be used to trigger a race condition fixed in a separate patch.

We want to make sure ctl->perturb_period * HZ will not overflow and is positive.

tc qd add dev lo root sfq perturb -10 # negative value : error Error: sch_sfq: invalid perturb period.

tc qd add dev lo root sfq perturb 1000000000 # too big : error Error: sch_sfq: invalid perturb period.

tc qd add dev lo root sfq perturb 2000000 # acceptable value tc -s -d qd sh dev lo qdisc sfq 8005: root refcnt 2 limit 127p quantum 64Kb depth 127 flows 128 divisor 1024 perturb 2000000sec
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-38193

Sources (Detail)

https://git.kernel.org/stable/c/0357da9149eac621f39e235a135ebf155f01f7c3
https://git.kernel.org/stable/c/590b2d7d0beadba2aa576708a05a05f0aae39295
https://git.kernel.org/stable/c/7ca52541c05c832d32b112274f81a985101f9ba8
https://git.kernel.org/stable/c/956b5aebb349449b38d920d444ca1392d43719d1
https://git.kernel.org/stable/c/b11a50544af691b787384089b68f740ae20a441b
https://git.kernel.org/stable/c/f9b97d466e6026ccbdda30bb5b71965b67ccbc82
Source Url

Alert History

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0
Date Informations
2025-07-04 21:20:35
  • First insertion