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CVE-2024-40995— net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于 net/sched:act_api 组件在 tcf_idr_check_alloc 函数中存在潜在的无限循环问题。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.29% · P20

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 0190c1d452a91c38a3462abdd81752be1b9006a8< 0d8a2d287c8a394c0d4653f0c6c7be4c688e5a74 affected
0190c1d452a91c38a3462abdd81752be1b9006a8< c6a7da65a296745535a964be1019ec7691b0cb90 affected
0190c1d452a91c38a3462abdd81752be1b9006a8< 25987a97eec4d5f897cd04ee1b45170829c610da affected
0190c1d452a91c38a3462abdd81752be1b9006a8< 6fc78d67f51aeb9a542d39a8714e16bc411582d4 affected
0190c1d452a91c38a3462abdd81752be1b9006a8< 5f926aa96b08b6c47178fe1171e7ae331c695fc2 affected
0190c1d452a91c38a3462abdd81752be1b9006a8< 7a0e497b597df7c4cf2b63fc6e9188b6cabe5335 affected
0190c1d452a91c38a3462abdd81752be1b9006a8< d864319871b05fadd153e0aede4811ca7008f5d6 affected
4.19 affected
… +8 more rows
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I. Basic Information for CVE-2024-40995

Vulnerability Information
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Vulnerability Title
net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc()
Source: CVE Program / CVE List V5
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
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于 net/sched:act_api 组件在 tcf_idr_check_alloc 函数中存在潜在的无限循环问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 0190c1d452a91c38a3462abdd81752be1b9006a8 ~ 0d8a2d287c8a394c0d4653f0c6c7be4c688e5a74 -
Linux Linux 4.19 -

II. Public POCs for CVE-2024-40995

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III. Intelligence Information for CVE-2024-40995

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Other References for CVE-2024-40995 (7)

Same Patch Batch · Linux · 2024-07-12 · 122 CVEs total

CVE-2024-40907 9.8 CRITICAL ionic: fix kernel panic in XDP_TX action
CVE-2024-40923 9.8 CRITICAL vmxnet3: disable rx data ring on dma allocation failure
CVE-2024-40983 9.8 CRITICAL tipc: force a dst refcount before doing decryption
CVE-2024-40999 9.8 CRITICAL net: ena: Add validation for completion descriptors consistency
CVE-2024-40937 9.8 CRITICAL gve: Clear napi->skb before dev_kfree_skb_any()
CVE-2024-40910 8.8 HIGH ax25: Fix refcount imbalance on inbound connections
CVE-2024-40911 8.8 HIGH wifi: cfg80211: Lock wiphy in cfg80211_get_station
CVE-2024-40941 8.1 HIGH wifi: iwlwifi: mvm: don't read past the mfuart notifcation
CVE-2024-40953 7.9 HIGH KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin()
CVE-2024-39495 7.8 HIGH greybus: Fix use-after-free bug in gb_interface_release due to race condition.
CVE-2024-40943 7.8 HIGH ocfs2: fix races between hole punching and AIO+DIO
CVE-2024-40958 7.8 HIGH netns: Make get_net_ns() handle zero refcount net
CVE-2024-40956 7.8 HIGH dmaengine: idxd: Fix possible Use-After-Free in irq_process_work_list
CVE-2024-40991 7.8 HIGH dmaengine: ti: k3-udma-glue: Fix of_k3_udma_glue_parse_chn_by_id()
CVE-2024-40990 7.8 HIGH RDMA/mlx5: Add check for srq max_sge attribute
CVE-2024-40989 7.8 HIGH KVM: arm64: Disassociate vcpus from redistributor region on teardown
CVE-2024-40986 7.8 HIGH dmaengine: xilinx: xdma: Fix data synchronisation in xdma_channel_isr()
CVE-2024-40918 7.8 HIGH parisc: Try to fix random segmentation faults in package builds
CVE-2024-40947 7.8 HIGH ima: Avoid blocking in RCU read-side critical section
CVE-2024-40979 7.8 HIGH wifi: ath12k: fix kernel crash during resume

Showing top 20 of 122 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-40995

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