CVE-2025-38083 Details
Description
In the Linux kernel, the following vulnerability has been resolved: net_sched: prio: fix a race in prio_tune() Gerrard Tai reported a race condition in PRIO, whenever SFQ perturb timer fires at the wrong time. The race is as follows: CPU 0 CPU 1 [1]: lock root [2]: qdisc_tree_flush_backlog() [3]: unlock root | | [5]: lock root | [6]: rehash | [7]: qdisc_tree_reduce_backlog() | [4]: qdisc_put() This can be abused to underflow a parent's qlen. Calling qdisc_purge_queue() instead of qdisc_tree_flush_backlog() should fix the race, because all packets will be purged from the qdisc before releasing the lock.
A race condition vulnerability has been identified in the Linux kernel's PRIO scheduling component, in versions prior to 6.5.3. This vulnerability arises when the SFQ perturb timer activates at an inopportune moment, creating a timing conflict. The issue can be exploited to cause an underflow in a parent's queue length.
Users can upgrade to Linux kernel version 6.5.3 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://cert-portal.siemens.com/productcert/html/ssa-082556.html | siemens-SADP | |
| https://git.kernel.org/stable/c/20f68e6a9e41693cb0e55e5b9ebbcb40983a4b8f | kernel.org | Patch |
| https://git.kernel.org/stable/c/3aaa7c01cf19d9b9bb64b88b65c3a6fd05da2eb4 | kernel.org | Patch |
| https://git.kernel.org/stable/c/4483d8b9127591c60c4eb789d6cab953bc4522a9 | kernel.org | Patch |
| https://git.kernel.org/stable/c/46c15c9d0f65c9ba857d63f53264f4b17e8a715f | kernel.org | Patch |
| https://git.kernel.org/stable/c/53d11560e957d53ee87a0653d258038ce12361b7 | kernel.org | Patch |
| https://git.kernel.org/stable/c/93f9eeb678d4c9c1abf720b3615fa8299a490845 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d35acc1be3480505b5931f17e4ea9b7617fea4d3 | kernel.org | Patch |
| https://git.kernel.org/stable/c/e3f6745006dc9423d2b065b90f191cfa11b1b584 | kernel.org | Patch |
| https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html | CVE | Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html | CVE | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-362 | Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.0, < 5.4.295 >= 5.5, < 5.10.239 >= 5.11, < 5.15.186 >= 5.16, < 6.1.142 >= 6.2, < 6.6.94 >= 6.7, < 6.12.34 >= 6.13, < 6.15.3 6.16 rc1 |
CPE
Remediation
| |
| debian debian linux | 11.0 |
CPE
Remediation
| |
Change History
8 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 30, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | siemens-SADP |
| May 12, 2026 | CVE Modified | siemens-SADP |
| Dec 17, 2025 | Initial Analysis | [email protected] |
| Nov 3, 2025 | CVE Modified | CVE |
| Jun 27, 2025 | CVE Modified | kernel.org |
| Jun 20, 2025 | New CVE Received | kernel.org |