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CVE-2024-40942

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_pr…

Published Jul 12, 2024 · updated Oct 15, 2026 · linux linux kernel

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: [ ] __kmem_cache_alloc_node+0x1e0/0x35c [ ] kmalloc_trace+0x34/0x80 [ ] mesh_queue_preq+0x44/0x2a8 [ ] mesh_nexthop_resolve+0x198/0x19c [ ] ieee80211_xmit+0x1d0/0x1f4 [ ] __ieee80211_subif_start_xmit+0x30c/0x764 [ ] ieee80211_subif_start_xmit+0x9c/0x7a4 [ ] dev_hard_start_xmit+0x174/0x440 [ ] __dev_queue_xmit+0xe24/0x111c [ ] batadv_send_skb_packet+0x180/0x1e4 [ ] batadv_v_elp_periodic_work+0x2f4/0x508 [ ] process_one_work+0x4b8/0xa1c [ ] worker_thread+0x9c/0x634 [ ] kthread+0x1bc/0x1c4 [ ] 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: [ ] __kmem_cache_alloc_node+0x1e0/0x35c [ ] kmalloc_trace+0x34/0x80 [ ] mesh_queue_preq+0x44/0x2a8 [ ] mesh_nexthop_resolve+0x198/0x19c [ ] ieee80211_xmit+0x1d0/0x1f4 [ ] __ieee80211_subif_start_xmit+0x30c/0x764 [ ] ieee80211_subif_start_xmit+0x9c/0x7a4 [ ] dev_hard_start_xmit+0x174/0x440 [ ] __dev_queue_xmit+0xe24/0x111c [ ] batadv_send_skb_packet+0x180/0x1e4 [ ] batadv_v_elp_periodic_work+0x2f4/0x508 [

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 12, 2024 · NIST NVD

    Detected

    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 correspondi

  2. Oct 15, 2026 · NIST NVD

    Updated

    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 correspondi

Affected

  • cpe linux/linux kernelversion unspecified
  • cpe linux/linux kernel6.10

Sources

  • CVE.orgVulnerability recordCVE-2024-40942

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2024-40942

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2024-40942

    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 de

    nvd.nist.gov

References