CVE-2024-54683

netfilter: IDLETIMER: Fix for possible ABBA deadlock

Published Jan 11, 2025 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Description

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.

Analysis

No analysis available yet

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`0902b469bd25065aa0688c3cee6f11744c817e7c`	affected	< 5493d84a40f0e61da74e1b0db640845997836b4e
`0902b469bd25065aa0688c3cee6f11744c817e7c`	affected	< 8c2c8445cda8f59c38dec7dc10509bcb23ae26a0
`0902b469bd25065aa0688c3cee6f11744c817e7c`	affected	< 45fe76573a2557f632e248cc141342233f422b9a
`0902b469bd25065aa0688c3cee6f11744c817e7c`	affected	< f36b01994d68ffc253c8296e2228dfe6e6431c03

Linux

affected

Version	Status	Constraints
`2.6.36`	affected	—
`0`	unaffected	< 2.6.36
`6.1.191`	unaffected	≤ 6.1.*
`6.6.67`	unaffected	≤ 6.6.*
`6.12.6`	unaffected	≤ 6.12.*
`6.13`	unaffected	≤ *

Configuration 1 [-]

OR	cpe:2.3:o:linux:linux_kernel::::::::
	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::::::

No data.

No data available yet.

Remediation

No remediation available yet

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2024-52653	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.
Ubuntu USN	USN-7379-1	Linux kernel vulnerabilities
Ubuntu USN	USN-7379-2	Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN	USN-7380-1	Linux kernel (Low Latency) vulnerabilities
Ubuntu USN	USN-7381-1	Linux kernel (Low Latency) vulnerabilities
Ubuntu USN	USN-7382-1	Linux kernel (OEM) vulnerabilities
Ubuntu USN	USN-7513-1	Linux kernel vulnerabilities
Ubuntu USN	USN-7513-2	Linux kernel (Real-time) vulnerabilities
Ubuntu USN	USN-7513-3	Linux kernel vulnerabilities
Ubuntu USN	USN-7513-4	Linux kernel (HWE) vulnerabilities
Ubuntu USN	USN-7513-5	Linux kernel (Oracle) vulnerabilities
Ubuntu USN	USN-7514-1	Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN	USN-7515-1	Linux kernel (GKE) vulnerabilities
Ubuntu USN	USN-7515-2	Linux kernel vulnerabilities
Ubuntu USN	USN-7522-1	Linux kernel (Azure, N-Series) vulnerabilities
Ubuntu USN	USN-7523-1	Linux kernel (Raspberry Pi Real-time) vulnerabilities
Ubuntu USN	USN-7524-1	Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN	USN-8961-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9029-1	Linux kernel (Raspberry Pi) vulnerabilities

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.162% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://git.kernel.org/stable/c/45fe76573a2557f632e248cc141342233f422b9a
https://git.kernel.org/stable/c/5493d84a40f0e61da74e1b0db640845997836b4e
https://git.kernel.org/stable/c/8c2c8445cda8f59c38dec7dc10509bcb23ae26a0
https://git.kernel.org/stable/c/f36b01994d68ffc253c8296e2228dfe6e6431c03
https://lore.kernel.org/linux-cve-announce/2025011159-CVE-2024-54683-042e@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2024-54683
https://www.cve.org/CVERecord?id=CVE-2024-54683

History

Oct 30, 2026 12:30 PM Added references View changes

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/5493d84a40f0e61da74e1b0db640845997836b4e

Oct 2, 2025 9:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Jul 16, 2025 1:45 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	epss `{'score': 0.00017}`	epss `{'score': 0.00018}`

Jan 16, 2025 3:45 PM First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Linux Linux linux Kernel
Weaknesses		CWE-667
CPEs		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::::::
Vendors & Products		Linux Linux linux Kernel

Jan 14, 2025 8:45 AM Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2025011159-CVE-2024-54683-042e@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2024-54683 https://www.cve.org/CVERecord?id=CVE-2024-54683
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Moderate`

Jan 11, 2025 12:45 PM Description updated. Title updated. Added references View changes

Type	Values Removed	Values Added
Description		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.
Title		netfilter: IDLETIMER: Fix for possible ABBA deadlock
References		https://git.kernel.org/stable/c/45fe76573a2557f632e248cc141342233f422b9a https://git.kernel.org/stable/c/8c2c8445cda8f59c38dec7dc10509bcb23ae26a0 https://git.kernel.org/stable/c/f36b01994d68ffc253c8296e2228dfe6e6431c03