CVE-2025-38000

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue() When enqueuing the first packet to an HFSC class, hfsc_enqueue() calls the child qdisc's peek() operation before incrementing sch->q.qlen and sch->qstats.backlog. If the child qdisc uses qdisc_peek_dequeued(), this may trigger an immediate dequeue and potential packet drop. In such cases, qdisc_tree_reduce_backlog() is called, but the HFSC qdisc's qlen and backlog have not yet been updated, leading to inconsistent queue accounting. This can leave an empty H...

Affected product and versions

Product

Linux Linux, linux kernel, debian linux

Affected versions

>= 12d0ad3be9c3854e52ec74bb83bb6f43612827c7 < 1034e3310752e8675e313f7271b348914008719a, >= 12d0ad3be9c3854e52ec74bb83bb6f43612827c7 < f9f593e34d2fb67644372c8f7b033bdc622ad228, >= 12d0ad3be9c3854e52ec74bb83bb6f43612827c7 < 89c301e929a0db14ebd94b4d97764ce1d6981653, >= 12d0ad3be9c3854e52ec74bb83bb6f43612827c7 < f1dde3eb17dc1b8bd07aed00004b1e05fc87a3d4, >= 12d0ad3be9c3854e52ec74bb83bb6f43612827c7 < 93c276942e75de0e5bc91576300d292e968f5a02, >= 12d0ad3be9c3854e52ec74bb83bb6f43612827c7 < 49b21795b8e5654a7df3d910a12e1060da4c04cf, >= 12d0ad3be9c3854e52ec74bb83bb6f43612827c7 < 3f3a22eebbc32b4fa8ce9c1d5f9db214b45b9335, >= 12d0ad3be9c3854e52ec74bb83bb6f43612827c7 < 3f981138109f63232a5fb7165938d4c945cc1b9d, >= 4.8, >= 4.8 < 5.4.294, >= 5.5 < 5.10.238, >= 5.11 < 5.15.185, >= 5.16 < 6.1.141, >= 6.2 < 6.6.93, >= 6.7 < 6.12.31, >= 6.13 < 6.14.9, 6.15, 11.0

Fixed versions

5.4.294, 5.10.238, 5.15.185, 6.1.141, 6.6.93, 6.12.31, 6.14.9

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416