5.5
MEDIUM
CVE-2024-40995
Linux kernel NetDevice Action API Infinite Loop Vulnerability
Description

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc() syzbot found hanging tasks waiting on rtnl_lock [1] A reproducer is available in the syzbot bug. When a request to add multiple actions with the same index is sent, the second request will block forever on the first request. This holds rtnl_lock, and causes tasks to hang. Return -EAGAIN to prevent infinite looping, while keeping documented behavior. [1] INFO: task kworker/1:0:5088 blocked for more than 143 seconds. Not tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:23744 pid:5088 tgid:5088 ppid:2 flags:0x00004000 Workqueue: events_power_efficient reg_check_chans_work Call Trace: <TASK> context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6746 __schedule_loop kernel/sched/core.c:6823 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6838 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 wiphy_lock include/net/cfg80211.h:5953 [inline] reg_leave_invalid_chans net/wireless/reg.c:2466 [inline] reg_check_chans_work+0x10a/0x10e0 net/wireless/reg.c:2481

INFO

Published Date :

July 12, 2024, 1:15 p.m.

Last Modified :

Aug. 21, 2024, 4:33 p.m.

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Remotely Exploitable :

No

Impact Score :

3.6

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2024-40995 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2024-40995.

URL Resource
https://git.kernel.org/stable/c/0d8a2d287c8a394c0d4653f0c6c7be4c688e5a74 Patch
https://git.kernel.org/stable/c/25987a97eec4d5f897cd04ee1b45170829c610da Patch
https://git.kernel.org/stable/c/5f926aa96b08b6c47178fe1171e7ae331c695fc2 Patch
https://git.kernel.org/stable/c/6fc78d67f51aeb9a542d39a8714e16bc411582d4 Patch
https://git.kernel.org/stable/c/7a0e497b597df7c4cf2b63fc6e9188b6cabe5335 Patch
https://git.kernel.org/stable/c/c6a7da65a296745535a964be1019ec7691b0cb90 Patch
https://git.kernel.org/stable/c/d864319871b05fadd153e0aede4811ca7008f5d6 Patch

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2024-40995 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2024-40995 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Aug. 21, 2024

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://git.kernel.org/stable/c/0d8a2d287c8a394c0d4653f0c6c7be4c688e5a74 No Types Assigned https://git.kernel.org/stable/c/0d8a2d287c8a394c0d4653f0c6c7be4c688e5a74 Patch
    Changed Reference Type https://git.kernel.org/stable/c/25987a97eec4d5f897cd04ee1b45170829c610da No Types Assigned https://git.kernel.org/stable/c/25987a97eec4d5f897cd04ee1b45170829c610da Patch
    Changed Reference Type https://git.kernel.org/stable/c/5f926aa96b08b6c47178fe1171e7ae331c695fc2 No Types Assigned https://git.kernel.org/stable/c/5f926aa96b08b6c47178fe1171e7ae331c695fc2 Patch
    Changed Reference Type https://git.kernel.org/stable/c/6fc78d67f51aeb9a542d39a8714e16bc411582d4 No Types Assigned https://git.kernel.org/stable/c/6fc78d67f51aeb9a542d39a8714e16bc411582d4 Patch
    Changed Reference Type https://git.kernel.org/stable/c/7a0e497b597df7c4cf2b63fc6e9188b6cabe5335 No Types Assigned https://git.kernel.org/stable/c/7a0e497b597df7c4cf2b63fc6e9188b6cabe5335 Patch
    Changed Reference Type https://git.kernel.org/stable/c/c6a7da65a296745535a964be1019ec7691b0cb90 No Types Assigned https://git.kernel.org/stable/c/c6a7da65a296745535a964be1019ec7691b0cb90 Patch
    Changed Reference Type https://git.kernel.org/stable/c/d864319871b05fadd153e0aede4811ca7008f5d6 No Types Assigned https://git.kernel.org/stable/c/d864319871b05fadd153e0aede4811ca7008f5d6 Patch
    Added CWE NIST CWE-835
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.19 up to (excluding) 5.4.279 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.221 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.162 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.96 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.36 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.9.7 *cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:*
  • CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 12, 2024

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc() syzbot found hanging tasks waiting on rtnl_lock [1] A reproducer is available in the syzbot bug. When a request to add multiple actions with the same index is sent, the second request will block forever on the first request. This holds rtnl_lock, and causes tasks to hang. Return -EAGAIN to prevent infinite looping, while keeping documented behavior. [1] INFO: task kworker/1:0:5088 blocked for more than 143 seconds. Not tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:23744 pid:5088 tgid:5088 ppid:2 flags:0x00004000 Workqueue: events_power_efficient reg_check_chans_work Call Trace: <TASK> context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6746 __schedule_loop kernel/sched/core.c:6823 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6838 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 wiphy_lock include/net/cfg80211.h:5953 [inline] reg_leave_invalid_chans net/wireless/reg.c:2466 [inline] reg_check_chans_work+0x10a/0x10e0 net/wireless/reg.c:2481
    Added Reference kernel.org https://git.kernel.org/stable/c/0d8a2d287c8a394c0d4653f0c6c7be4c688e5a74 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/c6a7da65a296745535a964be1019ec7691b0cb90 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/25987a97eec4d5f897cd04ee1b45170829c610da [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/6fc78d67f51aeb9a542d39a8714e16bc411582d4 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/5f926aa96b08b6c47178fe1171e7ae331c695fc2 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/7a0e497b597df7c4cf2b63fc6e9188b6cabe5335 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/d864319871b05fadd153e0aede4811ca7008f5d6 [No types assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2024-40995 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2024-40995 weaknesses.

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
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