CVE-2025-38107

Vulnerability overview

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 re...

Affected product and versions

Product

Linux Linux, linux kernel, debian linux

Affected versions

>= 699d82e9a6db29d509a71f1f2f4316231e6232e6 < eb7b74e9754e1ba2088f914ad1f57a778b11894b, >= ce881ddbdc028fb1988b66e40e45ca0529c23b46 < 0b479d0aa488cb478eb2e1d8868be946ac8afb4f, >= b05972f01e7d30419987a1f221b5593668fd6448 < 347867cb424edae5fec1622712c8dd0a2c42918f, >= b05972f01e7d30419987a1f221b5593668fd6448 < 0383b25488a545be168744336847549d4a2d3d6c, >= b05972f01e7d30419987a1f221b5593668fd6448 < 073f64c03516bcfaf790f8edc772e0cfb8a84ec3, >= b05972f01e7d30419987a1f221b5593668fd6448 < fed94bd51d62d2e0e006aa61480e94e5cd0582b0, >= b05972f01e7d30419987a1f221b5593668fd6448 < d92adacdd8c2960be856e0b82acc5b7c5395fddb, >= fffa19b5e58c34004a0d6f642d9c24b11d213994, >= fb155f6597cd7bc3aeed668c3bb15fc3b7cb257d, >= 5.10.142 < 5.10.239, >= 5.15.66 < 5.15.186, >= 5.4.213 < 5.5, >= 5.19.8 < 5.20, >= 6.0, >= 5.19.8 < 6.0, >= 6.0.1 < 6.1.142, >= 6.2 < 6.6.94, >= 6.7 < 6.12.34, >= 6.13 < 6.15.3, 6.0

Fixed versions

5.5, 5.10.239, 5.15.186, 6.0, 6.1.142, 6.6.94, 6.12.34, 6.15.3

Technical data

CVSS vector

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

CWE

CWE-362