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.
References
Configurations
Configuration 1 (hide)
|
History
16 Jan 2025, 15:18
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/45fe76573a2557f632e248cc141342233f422b9a - Patch | |
| References | () https://git.kernel.org/stable/c/8c2c8445cda8f59c38dec7dc10509bcb23ae26a0 - Patch | |
| References | () https://git.kernel.org/stable/c/f36b01994d68ffc253c8296e2228dfe6e6431c03 - Patch | |
| CWE | CWE-667 | |
| Summary |
|
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:* |
11 Jan 2025, 13:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-01-11 13:15
Updated : 2025-01-16 15:18
NVD link : CVE-2024-54683
Mitre link : CVE-2024-54683
CVE.ORG link : CVE-2024-54683
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-667
Improper Locking