CVE-2021-47499

Summary

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

iio: accel: kxcjk-1013: Fix possible memory leak in probe and remove

When ACPI type is ACPI_SMO8500, the data->dready_trig will not be set, the memory allocated by iio_triggered_buffer_setup() will not be freed, and cause memory leak as follows:

unreferenced object 0xffff888009551400 (size 512): comm "i2c-SMO8500-125", pid 911, jiffies 4294911787 (age 83.852s) hex dump (first 32 bytes): 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ……………. 00 00 00 00 00 00 00 00 20 e2 e5 c0 ff ff ff ff …….. ……. backtrace: [<0000000041ce75ee>] kmem_cache_alloc_trace+0x16d/0x360 [<000000000aeb17b0>] iio_kfifo_allocate+0x41/0x130 [kfifo_buf] [<000000004b40c1f5>] iio_triggered_buffer_setup_ext+0x2c/0x210 [industrialio_triggered_buffer] [<000000004375b15f>] kxcjk1013_probe+0x10c3/0x1d81 [kxcjk_1013]

Fix it by remove data->dready_trig condition in probe and remove.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa25691c1f9674090fb66586cf4c5d60d3efdf339 < 8c1d43f3a3fc7184c42d7398bdf59a2a2903e4fcaffected
LinuxLinuxa25691c1f9674090fb66586cf4c5d60d3efdf339 < 60a55b9d91ba99eb8cf015bc46dc2de05e168a15affected
LinuxLinuxa25691c1f9674090fb66586cf4c5d60d3efdf339 < 3899700ddacbf7aaafadf44464fff3ff0d4e3307affected
LinuxLinuxa25691c1f9674090fb66586cf4c5d60d3efdf339 < a3730f74159ad00a28960c0efe2a931fe6fe6b45affected
LinuxLinuxa25691c1f9674090fb66586cf4c5d60d3efdf339 < 8c163a14277115ca962103910ab4cce55e862ffbaffected
LinuxLinuxa25691c1f9674090fb66586cf4c5d60d3efdf339 < ee86d0bad80bdcd11a87e188a596727f41b62320affected
LinuxLinuxa25691c1f9674090fb66586cf4c5d60d3efdf339 < 14508fe13b1c578b3d2ba574f1d48b351975860caffected
LinuxLinuxa25691c1f9674090fb66586cf4c5d60d3efdf339 < 70c9774e180d151abaab358108e3510a8e615215affected
LinuxLinux4.2affected
LinuxLinux0 < 4.2unaffected
LinuxLinux4.4.295 <= 4.4.*unaffected
LinuxLinux4.9.293 <= 4.9.*unaffected
LinuxLinux4.14.258 <= 4.14.*unaffected
LinuxLinux4.19.221 <= 4.19.*unaffected
LinuxLinux5.4.165 <= 5.4.*unaffected
LinuxLinux5.10.85 <= 5.10.*unaffected
LinuxLinux5.15.8 <= 5.15.*unaffected
LinuxLinux5.16 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References