CVE 2015-4177
The collect_mounts function in fs/namespace.c in the Linux kernel before 4.0.5 does not properly consider that it may execute after a path has been unmounted, which allows local users to cause a denial of service (system crash) by leveraging user-namespace root access for an MNT_DETACH umount2 system call.
Related bugs and status
CVE-2015-4177 (Candidate) is related to these bugs:
Bug #1462249: CVE-2015-4177
| Summary | In | Importance | Status | |||
|---|---|---|---|---|---|---|
| 1462249 | CVE-2015-4177 | linux (Ubuntu) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-fsl-imx51 (Ubuntu) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-mvl-dove (Ubuntu) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-backport-maverick (Ubuntu) | Undecided | New | ||
| 1462249 | CVE-2015-4177 | linux-lts-backport-natty (Ubuntu) | Undecided | New | ||
| 1462249 | CVE-2015-4177 | linux-ti-omap4 (Ubuntu) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-ec2 (Ubuntu) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux (Ubuntu Wily) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-ec2 (Ubuntu Wily) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-fsl-imx51 (Ubuntu Wily) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-backport-maverick (Ubuntu Wily) | Undecided | New | ||
| 1462249 | CVE-2015-4177 | linux-lts-backport-natty (Ubuntu Wily) | Undecided | New | ||
| 1462249 | CVE-2015-4177 | linux-mvl-dove (Ubuntu Wily) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-ti-omap4 (Ubuntu Wily) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux (Ubuntu Vivid) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-ec2 (Ubuntu Vivid) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-fsl-imx51 (Ubuntu Vivid) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-backport-maverick (Ubuntu Vivid) | Undecided | New | ||
| 1462249 | CVE-2015-4177 | linux-lts-backport-natty (Ubuntu Vivid) | Undecided | New | ||
| 1462249 | CVE-2015-4177 | linux-mvl-dove (Ubuntu Vivid) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-ti-omap4 (Ubuntu Vivid) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-backport-maverick (Ubuntu Utopic) | Undecided | Won't Fix | ||
| 1462249 | CVE-2015-4177 | linux-lts-backport-natty (Ubuntu Utopic) | Undecided | Won't Fix | ||
| 1462249 | CVE-2015-4177 | linux (Ubuntu Trusty) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-ec2 (Ubuntu Trusty) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-fsl-imx51 (Ubuntu Trusty) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-backport-maverick (Ubuntu Trusty) | Undecided | New | ||
| 1462249 | CVE-2015-4177 | linux-lts-backport-natty (Ubuntu Trusty) | Undecided | New | ||
| 1462249 | CVE-2015-4177 | linux-mvl-dove (Ubuntu Trusty) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-ti-omap4 (Ubuntu Trusty) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux (Ubuntu Precise) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-ec2 (Ubuntu Precise) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-fsl-imx51 (Ubuntu Precise) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-backport-maverick (Ubuntu Precise) | Undecided | Won't Fix | ||
| 1462249 | CVE-2015-4177 | linux-lts-backport-natty (Ubuntu Precise) | Undecided | Won't Fix | ||
| 1462249 | CVE-2015-4177 | linux-mvl-dove (Ubuntu Precise) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-ti-omap4 (Ubuntu Precise) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-trusty (Ubuntu) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-trusty (Ubuntu Precise) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-trusty (Ubuntu Trusty) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-trusty (Ubuntu Vivid) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-trusty (Ubuntu Wily) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-armadaxp (Ubuntu) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-armadaxp (Ubuntu Precise) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-armadaxp (Ubuntu Trusty) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-armadaxp (Ubuntu Vivid) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-armadaxp (Ubuntu Wily) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-goldfish (Ubuntu) | Medium | New | ||
| 1462249 | CVE-2015-4177 | linux-goldfish (Ubuntu Precise) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-goldfish (Ubuntu Trusty) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-goldfish (Ubuntu Vivid) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-goldfish (Ubuntu Wily) | Medium | New | ||
| 1462249 | CVE-2015-4177 | linux-lts-saucy (Ubuntu) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-saucy (Ubuntu Precise) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-saucy (Ubuntu Trusty) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-saucy (Ubuntu Vivid) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-saucy (Ubuntu Wily) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-quantal (Ubuntu) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-quantal (Ubuntu Precise) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-quantal (Ubuntu Trusty) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-quantal (Ubuntu Vivid) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-quantal (Ubuntu Wily) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-flo (Ubuntu) | Medium | New | ||
| 1462249 | CVE-2015-4177 | linux-flo (Ubuntu Precise) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-flo (Ubuntu Trusty) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-flo (Ubuntu Vivid) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-flo (Ubuntu Wily) | Medium | New | ||
| 1462249 | CVE-2015-4177 | linux-lts-vivid (Ubuntu) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-vivid (Ubuntu Precise) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-vivid (Ubuntu Trusty) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-vivid (Ubuntu Vivid) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-lts-vivid (Ubuntu Wily) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-mako (Ubuntu) | Medium | New | ||
| 1462249 | CVE-2015-4177 | linux-mako (Ubuntu Precise) | Medium | Invalid | ||
| 1462249 | CVE-2015-4177 | linux-mako (Ubuntu Trusty) | Medium | Invalid | ||
See the 
CVE page on Mitre.org
for more details.
