Medium 5.5Published Jul 12, 2024

CVE-2024-40942wifi: mac80211: mesh: Fix leak of mesh_preq_queue objects

Updated under an hour ago (2026-10-19 08:00 UTC)

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In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: mesh: Fix leak of mesh_preq_queue objects The hwmp code use objects of type mesh_preq_queue, added to a list in ieee80211_if_mesh, to keep track of mpath we need to resolve. If the mpath gets deleted, ex mesh interface is removed, the entries in that list will never get cleaned. Fix this by flushing all corresponding items of the preq_queue in mesh_path_flush_pending(). This should take care of KASAN reports like this: unreferenced object 0xffff00000668d800 (size 128): comm "kworker/u8:4", pid 67, jiffies 4295419552 (age 1836.444s) hex dump (first 32 bytes): 00 1f 05 09 00 00 ff ff 00 d5 68 06 00 00 ff ff ..........h..... 8e 97 ea eb 3e b8 01 00 00 00 00 00 00 00 00 00 ....>........... backtrace: [<000000007302a0b6>] __kmem_cache_alloc_node+0x1e0/0x35c [<00000000049bd418>] kmalloc_trace+0x34/0x80 [<0000000000d792bb>] mesh_queue_preq+0x44/0x2a8 [<00000000c99c3696>] mesh_nexthop_resolve+0x198/0x19c [<00000000926bf598>] ieee80211_xmit+0x1d0/0x1f4 [<00000000fc8c2284>] __ieee80211_subif_start_xmit+0x30c/0x764 [<000000005926ee38>] ieee80211_subif_start_xmit+0x9c/0x7a4 [<000000004c86e916>] dev_hard_start_xmit+0x174/0x440 [<0000000023495647>] __dev_queue_xmit+0xe24/0x111c [<00000000cfe9ca78>] batadv_send_skb_packet+0x180/0x1e4 [<000000007bacc5d5>] batadv_v_elp_periodic_work+0x2f4/0x508 [<00000000adc3cd94>] process_one_work+0x4b8/0xa1c [<00000000b36425d1>] worker_thread+0x9c/0x634 [<0000000005852dd5>] kthread+0x1bc/0x1c4 [<000000005fccd770>] ret_from_fork+0x10/0x20 unreferenced object 0xffff000009051f00 (size 128): comm "kworker/u8:4", pid 67, jiffies 4295419553 (age 1836.440s) hex dump (first 32 bytes): 90 d6 92 0d 00 00 ff ff 00 d8 68 06 00 00 ff ff ..........h..... 36 27 92 e4 02 e0 01 00 00 58 79 06 00 00 ff ff 6'.......Xy..... backtrace: [<000000007302a0b6>] __kmem_cache_alloc_node+0x1e0/0x35c [<00000000049bd418>] kmalloc_trace+0x34/0x80 [<0000000000d792bb>] mesh_queue_preq+0x44/0x2a8 [<00000000c99c3696>] mesh_nexthop_resolve+0x198/0x19c [<00000000926bf598>] ieee80211_xmit+0x1d0/0x1f4 [<00000000fc8c2284>] __ieee80211_subif_start_xmit+0x30c/0x764 [<000000005926ee38>] ieee80211_subif_start_xmit+0x9c/0x7a4 [<000000004c86e916>] dev_hard_start_xmit+0x174/0x440 [<0000000023495647>] __dev_queue_xmit+0xe24/0x111c [<00000000cfe9ca78>] batadv_send_skb_packet+0x180/0x1e4 [<000000007bacc5d5>] batadv_v_elp_periodic_work+0x2f4/0x508 [<00000000adc3cd94>] process_one_work+0x4b8/0xa1c [<00000000b36425d1>] worker_thread+0x9c/0x634 [<0000000005852dd5>] kthread+0x1bc/0x1c4 [<000000005fccd770>] ret_from_fork+0x10/0x20

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e before 377dbb220edc8421b7960691876c5b3bef62f89b; from 050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e before ec79670eae430b3ffb7e0a6417ad7657728b8f95; from 050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e before 7518e20a189f8659b8b83969db4d33a4068fcfc3; from 050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e before c4c865f971fd4a255208f57ef04d814c2ae9e0dc; from 050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e before 617dadbfb2d3e152c5753e28356d189c9d6f33c0; from 050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e before 63d5f89bb5664d60edbf8cf0df911aaae8ed96a4; from 050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e before d81e244af521de63ad2883e17571b789c39b6549; from 050ac52cbe1f3de2fb0d06f02c7919ae1f691c9e before b7d7f11a291830fdf69d3301075dd0fb347ced84	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	before V1.1.1	CISA ADP
linux linux_kernel linux:linux_kernel	from 2.6.26 before 4.19.317; from 4.20 before 5.4.279; from 5.5 before 5.10.221; from 5.11 before 5.15.162; from 5.16 before 6.1.95; from 6.2 before 6.6.35; from 6.7 before 6.9.6; 6.10; and 1 more ranges	NVD

References

https://git.kernel.org/stable/c/377dbb220edc8421b7960691876c5b3bef62f89bpatch
https://git.kernel.org/stable/c/ec79670eae430b3ffb7e0a6417ad7657728b8f95patch
https://git.kernel.org/stable/c/7518e20a189f8659b8b83969db4d33a4068fcfc3patch
https://git.kernel.org/stable/c/c4c865f971fd4a255208f57ef04d814c2ae9e0dcpatch
https://git.kernel.org/stable/c/617dadbfb2d3e152c5753e28356d189c9d6f33c0patch
https://git.kernel.org/stable/c/63d5f89bb5664d60edbf8cf0df911aaae8ed96a4patch
https://git.kernel.org/stable/c/d81e244af521de63ad2883e17571b789c39b6549patch
https://git.kernel.org/stable/c/b7d7f11a291830fdf69d3301075dd0fb347ced84patch
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
https://cert-portal.siemens.com/productcert/html/ssa-265688.html
https://cert-portal.siemens.com/productcert/html/ssa-355557.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.