7.8

CVE-2022-49685

iio: trigger: sysfs: fix use-after-free on remove

In the Linux kernel, the following vulnerability has been resolved:

iio: trigger: sysfs: fix use-after-free on remove

Ensure that the irq_work has completed before the trigger is freed.

 ==================================================================
 BUG: KASAN: use-after-free in irq_work_run_list
 Read of size 8 at addr 0000000064702248 by task python3/25

 Call Trace:
  irq_work_run_list
  irq_work_tick
  update_process_times
  tick_sched_handle
  tick_sched_timer
  __hrtimer_run_queues
  hrtimer_interrupt

 Allocated by task 25:
  kmem_cache_alloc_trace
  iio_sysfs_trig_add
  dev_attr_store
  sysfs_kf_write
  kernfs_fop_write_iter
  new_sync_write
  vfs_write
  ksys_write
  sys_write

 Freed by task 25:
  kfree
  iio_sysfs_trig_remove
  dev_attr_store
  sysfs_kf_write
  kernfs_fop_write_iter
  new_sync_write
  vfs_write
  ksys_write
  sys_write

 ==================================================================
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.7 < 4.9.321
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.286
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.250
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.202
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.127
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.51
Linux ≫ Linux Kernel Version >= 5.16 < 5.18.8
Linux ≫ Linux Kernel Version5.19 Updaterc1
Linux ≫ Linux Kernel Version5.19 Updaterc2
Linux ≫ Linux Kernel Version5.19 Updaterc3
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.26% 0.173
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/31ff3309b47d98313c61b8301bf595820cc3cc33
Patch
https://git.kernel.org/stable/c/4687c3f955240ca2a576bdc3f742d4d915b6272d
Patch
https://git.kernel.org/stable/c/4ef1e521be610b720daeb7cf899fedc7db0274c4
Patch
https://git.kernel.org/stable/c/5e39397d60dacc7f5d81d442c1c958eaaaf31128
Patch
https://git.kernel.org/stable/c/78601726d4a59a291acc5a52da1d3a0a6831e4e8
Patch
https://git.kernel.org/stable/c/b07a30a774b3c3e584a68dc91779c68ea2da4813
Patch
https://git.kernel.org/stable/c/d6111e7bdb8ec27eb43d01c4cd4ff1620a75f7f2
Patch
https://git.kernel.org/stable/c/fd5d8fb298a2866c337da635c79d63c3afabcaf7
Patch