CVE-2021-47305

Summary

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

dma-buf/sync_file: Don't leak fences on merge failure

Each add_fence() call does a dma_fence_get() on the relevant fence. In the error path, we weren't calling dma_fence_put() so all those fences got leaked. Also, in the krealloc_array failure case, we weren't freeing the fences array. Instead, ensure that i and fences are always zero-initialized and dma_fence_put() all the fences and kfree(fences) on every error path.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa02b9dc90d844cc7df7b63264e7920cc425052d9 < 19f51c2529339280d2c8c6427cd3e21ddf1ac3f8affected
LinuxLinuxa02b9dc90d844cc7df7b63264e7920cc425052d9 < e0355a0ad31a1d677b2a4514206de4902bd550e8affected
LinuxLinuxa02b9dc90d844cc7df7b63264e7920cc425052d9 < 41f45e91c92c8480242ea448d54e28c753b13902affected
LinuxLinuxa02b9dc90d844cc7df7b63264e7920cc425052d9 < 0d514185ae792d3a1903c8e1a83899aa996705ceaffected
LinuxLinuxa02b9dc90d844cc7df7b63264e7920cc425052d9 < 19edcd97727aae9362444a859a24d99a8730cb27affected
LinuxLinuxa02b9dc90d844cc7df7b63264e7920cc425052d9 < ffe000217c5068c5da07ccb1c0f8cce7ad767435affected
LinuxLinux4.9affected
LinuxLinux0 < 4.9unaffected
LinuxLinux4.14.241 <= 4.14.*unaffected
LinuxLinux4.19.199 <= 4.19.*unaffected
LinuxLinux5.4.135 <= 5.4.*unaffected
LinuxLinux5.10.53 <= 5.10.*unaffected
LinuxLinux5.13.5 <= 5.13.*unaffected
LinuxLinux5.14 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References