CVE-2024-40942

MEDIUM EPSS 17.2%
Published Jul 12, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jul 12, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

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 Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
17.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥2.6.26  –  <4.19.317
linuxlinux_kernel*≥4.20  –  <5.4.279
linuxlinux_kernel*≥5.5  –  <5.10.221
linuxlinux_kernel*≥5.11  –  <5.15.162
linuxlinux_kernel*≥5.16  –  <6.1.95
linuxlinux_kernel*≥6.2  –  <6.6.35
linuxlinux_kernel*≥6.7  –  <6.9.6
linuxlinux_kernel6.10any
linuxlinux_kernel6.10any

References 11

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-265688.html
  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-355557.html
  • git.kernel.org https://git.kernel.org/stable/c/377dbb220edc8421b7960691876c5b3bef62f89b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/617dadbfb2d3e152c5753e28356d189c9d6f33c0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/63d5f89bb5664d60edbf8cf0df911aaae8ed96a4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7518e20a189f8659b8b83969db4d33a4068fcfc3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b7d7f11a291830fdf69d3301075dd0fb347ced84
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c4c865f971fd4a255208f57ef04d814c2ae9e0dc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d81e244af521de63ad2883e17571b789c39b6549
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ec79670eae430b3ffb7e0a6417ad7657728b8f95
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/377dbb220edc8421b7960691876c5b3bef62f89b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/617dadbfb2d3e152c5753e28356d189c9d6f33c0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/63d5f89bb5664d60edbf8cf0df911aaae8ed96a4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7518e20a189f8659b8b83969db4d33a4068fcfc3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b7d7f11a291830fdf69d3301075dd0fb347ced84
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c4c865f971fd4a255208f57ef04d814c2ae9e0dc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d81e244af521de63ad2883e17571b789c39b6549
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ec79670eae430b3ffb7e0a6417ad7657728b8f95
    Patch