cbcvebase.
CVE-2024-54683
published 2025-01-11

CVE-2024-54683: In the Linux kernel, the following vulnerability has been resolved: netfilter: IDLETIMER: Fix for possible ABBA deadlock Deletion of the last rule referencing…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.16%
5.6th percentile
In the Linux kernel, the following vulnerability has been resolved: netfilter: IDLETIMER: Fix for possible ABBA deadlock Deletion of the last rule referencing a given idletimer may happen at the same time as a read of its file in sysfs: | ====================================================== | WARNING: possible circular locking dependency detected | 6.12.0-rc7-01692-g5e9a28f41134-dirty #594 Not tainted | ------------------------------------------------------ | iptables/3303 is trying to acquire lock: | ffff8881057e04b8 (kn->active#48){++++}-{0:0}, at: __kernfs_remove+0x20 | | but task is already holding lock: | ffffffffa0249068 (list_mutex){+.+.}-{3:3}, at: idletimer_tg_destroy_v] | | which lock already depends on the new lock. A simple reproducer is: | #!/bin/bash | | while true; do | iptables -A INPUT -i foo -j IDLETIMER --timeout 10 --label "testme" | iptables -D INPUT -i foo -j IDLETIMER --timeout 10 --label "testme" | done & | while true; do | cat /sys/class/xt_idletimer/timers/testme >/dev/null | done Avoid this by freeing list_mutex right after deleting the element from the list, then continuing with the teardown.

Affected

11 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.12.6-1 (forky)linux 6.12.6-1 (forky)
linuxlinux
linuxlinux>= 0902b469bd25065aa0688c3cee6f11744c817e7c < 8c2c8445cda8f59c38dec7dc10509bcb23ae26a08c2c8445cda8f59c38dec7dc10509bcb23ae26a0
linuxlinux>= 0902b469bd25065aa0688c3cee6f11744c817e7c < 45fe76573a2557f632e248cc141342233f422b9a45fe76573a2557f632e248cc141342233f422b9a
linuxlinux>= 0902b469bd25065aa0688c3cee6f11744c817e7c < f36b01994d68ffc253c8296e2228dfe6e6431c03f36b01994d68ffc253c8296e2228dfe6e6431c03
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.12.6-16.12.6-1
linuxlinux_kernel>= 0 < 6.12.6-16.12.6-1
linuxlinux_kernel>= 0 < 6.8.0-60.636.8.0-60.63
linuxlinux_kernel>= 2.6.36 < 6.6.676.6.67
linuxlinux_kernel>= 6.7 < 6.12.66.12.6

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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