Ubuntu.comUB:CVE-2021-47305CVE-2021-47305
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.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux | < any | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-aws | < any | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws-5.4 | < any | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-aws-hwe | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-azure | < any | UNKNOWN |
| ubuntu | 14.04 | noarch | linux-azure | < any | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-azure | < any | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-azure-4.15 | < any | UNKNOWN |
References
git.kernel.org/linus/ffe000217c5068c5da07ccb1c0f8cce7ad767435 (5.14-rc2)
git.kernel.org/stable/c/0d514185ae792d3a1903c8e1a83899aa996705ce
git.kernel.org/stable/c/19edcd97727aae9362444a859a24d99a8730cb27
git.kernel.org/stable/c/19f51c2529339280d2c8c6427cd3e21ddf1ac3f8
git.kernel.org/stable/c/41f45e91c92c8480242ea448d54e28c753b13902
git.kernel.org/stable/c/e0355a0ad31a1d677b2a4514206de4902bd550e8
git.kernel.org/stable/c/ffe000217c5068c5da07ccb1c0f8cce7ad767435
launchpad.net/bugs/cve/CVE-2021-47305
nvd.nist.gov/vuln/detail/CVE-2021-47305
security-tracker.debian.org/tracker/CVE-2021-47305
www.cve.org/CVERecord?id=CVE-2021-47305
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