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CVE-2025-38108
published 2025-07-03

CVE-2025-38108: In the Linux kernel, the following vulnerability has been resolved: net_sched: red: fix a race in __red_change() Gerrard Tai reported a race condition in RED…

high7CVSS 3.1
AVLACHPRLUINSUCHIHAH
In the Linux kernel, the following vulnerability has been resolved: net_sched: red: fix a race in __red_change() Gerrard Tai reported a race condition in RED, 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.

Affected

37 ranges· showing 25
VendorProductVersion rangeFixed in
debiandebian_linux
debianlinux< linux 6.1.147-1 (bookworm)linux 6.1.147-1 (bookworm)
debianlinux-6.1< linux 6.1.147-1 (bookworm)linux 6.1.147-1 (bookworm)
linuxlinux
linuxlinux>= 0c8d13ac96070000da33f394f45e9c19638483c5 < 2790c4ec481be45a80948d059cd7c9a06bc374932790c4ec481be45a80948d059cd7c9a06bc37493
linuxlinux>= 0c8d13ac96070000da33f394f45e9c19638483c5 < a1bf6a4e9264a685b0e642994031f9c5aad72414a1bf6a4e9264a685b0e642994031f9c5aad72414
linuxlinux>= 0c8d13ac96070000da33f394f45e9c19638483c5 < 110a47efcf23438ff8d31dbd9c854fae2a48bf98110a47efcf23438ff8d31dbd9c854fae2a48bf98
linuxlinux>= 0c8d13ac96070000da33f394f45e9c19638483c5 < f569984417a4e12c67366e69bdcb752970de921df569984417a4e12c67366e69bdcb752970de921d
linuxlinux>= 0c8d13ac96070000da33f394f45e9c19638483c5 < 2a71924ca4af59ffc00f0444732b6cd54b153d0e2a71924ca4af59ffc00f0444732b6cd54b153d0e
linuxlinux>= 0c8d13ac96070000da33f394f45e9c19638483c5 < 4b755305b2b0618e857fdadb499365b5f2e478d14b755305b2b0618e857fdadb499365b5f2e478d1
linuxlinux>= 0c8d13ac96070000da33f394f45e9c19638483c5 < 444ad445df5496a785705019268a8a84b84484bb444ad445df5496a785705019268a8a84b84484bb
linuxlinux>= 0c8d13ac96070000da33f394f45e9c19638483c5 < 85a3e0ede38450ea3053b8c45d28cf55208409b885a3e0ede38450ea3053b8c45d28cf55208409b8
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.244-15.10.244-1
linuxlinux_kernel>= 0 < 6.1.147-16.1.147-1
linuxlinux_kernel>= 0 < 6.12.35-16.12.35-1
linuxlinux_kernel>= 0 < 6.12.35-16.12.35-1
linuxlinux_kernel>= 0 < 5.15.0-156.1665.15.0-156.166
linuxlinux_kernel>= 0 < 6.8.0-100.1006.8.0-100.100
linuxlinux_kernel>= 5.0 < 5.4.2955.4.295
linuxlinux_kernel>= 5.11 < 5.15.1865.15.186
linuxlinux_kernel>= 5.16 < 6.1.1426.1.142
linuxlinux_kernel>= 5.5 < 5.10.2395.10.239
linuxlinux_kernel>= 6.13 < 6.15.36.15.3
linuxlinux_kernel>= 6.2 < 6.6.946.6.94

CVSS provenance

nvdv3.17.0HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.0HIGH