CVE - CVE-2025-38193

CVE-ID
CVE-2025-38193	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0357da9149eac621f39e235a135ebf155f01f7c3 URL:https://git.kernel.org/stable/c/0357da9149eac621f39e235a135ebf155f01f7c3 MISC:https://git.kernel.org/stable/c/590b2d7d0beadba2aa576708a05a05f0aae39295 URL:https://git.kernel.org/stable/c/590b2d7d0beadba2aa576708a05a05f0aae39295 MISC:https://git.kernel.org/stable/c/7ca52541c05c832d32b112274f81a985101f9ba8 URL:https://git.kernel.org/stable/c/7ca52541c05c832d32b112274f81a985101f9ba8 MISC:https://git.kernel.org/stable/c/956b5aebb349449b38d920d444ca1392d43719d1 URL:https://git.kernel.org/stable/c/956b5aebb349449b38d920d444ca1392d43719d1 MISC:https://git.kernel.org/stable/c/b11a50544af691b787384089b68f740ae20a441b URL:https://git.kernel.org/stable/c/b11a50544af691b787384089b68f740ae20a441b MISC:https://git.kernel.org/stable/c/f9b97d466e6026ccbdda30bb5b71965b67ccbc82 URL:https://git.kernel.org/stable/c/f9b97d466e6026ccbdda30bb5b71965b67ccbc82
Assigning CNA
kernel.org
Date Record Created
20250416	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250416)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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