CVE-2025-38107 - CVE House
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Status published Unknown CVE-2025-38107

net_sched: ets: fix a race in ets_qdisc_change()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: net_sched: ets: fix a race in ets_qdisc_change() Gerrard Tai reported a race condition in ETS, 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
699d82e9a6db29d509a71f1f2f4316231e6232e6, ce881ddbdc028fb1988b66e40e45ca0529c23b46, b05972f01e7d30419987a1f221b5593668fd6448, fffa19b5e58c34004a0d6f642d9c24b11d213994, fb155f6597cd7bc3aeed668c3bb15fc3b7cb257d, 5.10.142, 5.15.66, 5.4.213, 5.19.8, 6.0, 0, 5.10.239, 5.15.186, 6.1.142, 6.6.94, 6.12.34, 6.15.3, 6.16

Timeline

Official Publish: July 3rd, 2025
Last Modified: May 23rd, 2026
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.