Candidate: CVE-2015-4170
PublicDate: 2016-05-02 10:59:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-4170
 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf872776fc84128bb779ce2b83a37c884c3203ae (v3.13-rc5)
 http://www.openwall.com/lists/oss-security/2015/05/26/1
 http://www.openwall.com/lists/oss-security/2015/06/03/2
Description:
 Race condition in the ldsem_cmpxchg function in drivers/tty/tty_ldsem.c in
 the Linux kernel before 3.13-rc4-next-20131218 allows local users to cause
 a denial of service (ldsem_down_read and ldsem_down_write deadlock) by
 establishing a new tty thread during shutdown of a previous tty thread.
Ubuntu-Description:
Notes:
 jdstrand> android kernels (flo, goldfish, grouper, maguro, mako and manta) are
  not supported on the Ubuntu Touch 14.10 and earlier preview kernels
 jdstrand> linux-lts-saucy no longer receives official support
 jdstrand> linux-lts-quantal no longer receives official support
Bugs:
 https://bugzilla.redhat.com/show_bug.cgi?id=1218879
 https://launchpad.net/bugs/1462175
Priority: medium
Discovered-by:
Assigned-to:
CVSS:
 nvd: CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H [4.7 MEDIUM]

Patches_linux:
 break-fix: 4898e640caf03fdbaf2122d5a33949bf3e4a5b34 cf872776fc84128bb779ce2b83a37c884c3203ae
upstream_linux: released (3.13~rc5)
precise_linux: not-affected
trusty_linux: not-affected (3.13.0-1.16)
trusty/esm_linux: not-affected (3.13.0-1.16)
utopic_linux: not-affected (3.13.0-24.46)
vivid_linux: not-affected (3.16.0-23.31)
vivid/ubuntu-core_linux: not-affected (3.16.0-23.31)
vivid/stable-phone-overlay_linux: DNE
wily_linux: not-affected (3.19.0-15.15)
xenial_linux: not-affected (4.2.0-16.19)
esm-infra/xenial_linux: not-affected (4.2.0-16.19)
yakkety_linux: not-affected (4.4.0-21.37)
devel_linux: not-affected (4.8.0-22.24)

Patches_linux-ec2:
upstream_linux-ec2: released (3.13~rc5)
precise_linux-ec2: DNE
trusty_linux-ec2: DNE
trusty/esm_linux-ec2: DNE
utopic_linux-ec2: DNE
vivid_linux-ec2: DNE
vivid/ubuntu-core_linux-ec2: DNE
vivid/stable-phone-overlay_linux-ec2: DNE
wily_linux-ec2: DNE
xenial_linux-ec2: DNE
yakkety_linux-ec2: DNE
devel_linux-ec2: DNE

Patches_linux-mvl-dove:
upstream_linux-mvl-dove: released (3.13~rc5)
precise_linux-mvl-dove: DNE
trusty_linux-mvl-dove: DNE
trusty/esm_linux-mvl-dove: DNE
utopic_linux-mvl-dove: DNE
vivid_linux-mvl-dove: DNE
vivid/ubuntu-core_linux-mvl-dove: DNE
vivid/stable-phone-overlay_linux-mvl-dove: DNE
wily_linux-mvl-dove: DNE
xenial_linux-mvl-dove: DNE
yakkety_linux-mvl-dove: DNE
devel_linux-mvl-dove: DNE

Patches_linux-ti-omap4:
upstream_linux-ti-omap4: released (3.13~rc5)
precise_linux-ti-omap4: not-affected
trusty_linux-ti-omap4: DNE
trusty/esm_linux-ti-omap4: DNE
utopic_linux-ti-omap4: DNE
vivid_linux-ti-omap4: DNE
vivid/ubuntu-core_linux-ti-omap4: DNE
vivid/stable-phone-overlay_linux-ti-omap4: DNE
wily_linux-ti-omap4: DNE
xenial_linux-ti-omap4: DNE
yakkety_linux-ti-omap4: DNE
devel_linux-ti-omap4: DNE

Patches_linux-fsl-imx51:
upstream_linux-fsl-imx51: released (3.13~rc5)
precise_linux-fsl-imx51: DNE
trusty_linux-fsl-imx51: DNE
trusty/esm_linux-fsl-imx51: DNE
utopic_linux-fsl-imx51: DNE
vivid_linux-fsl-imx51: DNE
vivid/ubuntu-core_linux-fsl-imx51: DNE
vivid/stable-phone-overlay_linux-fsl-imx51: DNE
wily_linux-fsl-imx51: DNE
xenial_linux-fsl-imx51: DNE
yakkety_linux-fsl-imx51: DNE
devel_linux-fsl-imx51: DNE

Patches_linux-linaro-omap:
upstream_linux-linaro-omap: released (3.13~rc5)
precise_linux-linaro-omap: ignored (abandoned)
trusty_linux-linaro-omap: DNE
trusty/esm_linux-linaro-omap: DNE
utopic_linux-linaro-omap: DNE
vivid_linux-linaro-omap: DNE
vivid/ubuntu-core_linux-linaro-omap: DNE
vivid/stable-phone-overlay_linux-linaro-omap: DNE
wily_linux-linaro-omap: DNE
xenial_linux-linaro-omap: DNE
yakkety_linux-linaro-omap: DNE
devel_linux-linaro-omap: DNE

Patches_linux-linaro-shared:
upstream_linux-linaro-shared: released (3.13~rc5)
precise_linux-linaro-shared: ignored (abandoned)
trusty_linux-linaro-shared: DNE
trusty/esm_linux-linaro-shared: DNE
utopic_linux-linaro-shared: DNE
vivid_linux-linaro-shared: DNE
vivid/ubuntu-core_linux-linaro-shared: DNE
vivid/stable-phone-overlay_linux-linaro-shared: DNE
wily_linux-linaro-shared: DNE
xenial_linux-linaro-shared: DNE
yakkety_linux-linaro-shared: DNE
devel_linux-linaro-shared: DNE

Patches_linux-linaro-vexpress:
upstream_linux-linaro-vexpress: released (3.13~rc5)
precise_linux-linaro-vexpress: ignored (abandoned)
trusty_linux-linaro-vexpress: DNE
trusty/esm_linux-linaro-vexpress: DNE
utopic_linux-linaro-vexpress: DNE
vivid_linux-linaro-vexpress: DNE
vivid/ubuntu-core_linux-linaro-vexpress: DNE
vivid/stable-phone-overlay_linux-linaro-vexpress: DNE
wily_linux-linaro-vexpress: DNE
xenial_linux-linaro-vexpress: DNE
yakkety_linux-linaro-vexpress: DNE
devel_linux-linaro-vexpress: DNE

Patches_linux-qcm-msm:
upstream_linux-qcm-msm: released (3.13~rc5)
precise_linux-qcm-msm: ignored (abandoned)
trusty_linux-qcm-msm: DNE
trusty/esm_linux-qcm-msm: DNE
utopic_linux-qcm-msm: DNE
vivid_linux-qcm-msm: DNE
vivid/ubuntu-core_linux-qcm-msm: DNE
vivid/stable-phone-overlay_linux-qcm-msm: DNE
wily_linux-qcm-msm: DNE
xenial_linux-qcm-msm: DNE
yakkety_linux-qcm-msm: DNE
devel_linux-qcm-msm: DNE

Tags_linux-armadaxp: not-ue
Patches_linux-armadaxp:
upstream_linux-armadaxp: released (3.13~rc5)
precise_linux-armadaxp: not-affected
trusty_linux-armadaxp: DNE
trusty/esm_linux-armadaxp: DNE
utopic_linux-armadaxp: DNE
vivid_linux-armadaxp: DNE
vivid/ubuntu-core_linux-armadaxp: DNE
vivid/stable-phone-overlay_linux-armadaxp: DNE
wily_linux-armadaxp: DNE
xenial_linux-armadaxp: DNE
yakkety_linux-armadaxp: DNE
devel_linux-armadaxp: DNE

Tags_linux-lts-quantal: not-ue
Patches_linux-lts-quantal:
upstream_linux-lts-quantal: released (3.13~rc5)
precise_linux-lts-quantal: not-affected
trusty_linux-lts-quantal: DNE
trusty/esm_linux-lts-quantal: DNE
utopic_linux-lts-quantal: DNE
vivid_linux-lts-quantal: DNE
vivid/ubuntu-core_linux-lts-quantal: DNE
vivid/stable-phone-overlay_linux-lts-quantal: DNE
wily_linux-lts-quantal: DNE
xenial_linux-lts-quantal: DNE
yakkety_linux-lts-quantal: DNE
devel_linux-lts-quantal: DNE

Patches_linux-lts-raring:
upstream_linux-lts-raring: released (3.13~rc5)
precise_linux-lts-raring: ignored (was needs-triage now end-of-life)
trusty_linux-lts-raring: DNE
trusty/esm_linux-lts-raring: DNE
utopic_linux-lts-raring: DNE
vivid_linux-lts-raring: DNE
vivid/ubuntu-core_linux-lts-raring: DNE
vivid/stable-phone-overlay_linux-lts-raring: DNE
wily_linux-lts-raring: DNE
xenial_linux-lts-raring: DNE
yakkety_linux-lts-raring: DNE
devel_linux-lts-raring: DNE

Tags_linux-lts-saucy: not-ue
Patches_linux-lts-saucy:
upstream_linux-lts-saucy: released (3.13~rc5)
precise_linux-lts-saucy: ignored (was needed now end-of-life)
trusty_linux-lts-saucy: DNE
trusty/esm_linux-lts-saucy: DNE
utopic_linux-lts-saucy: DNE
vivid_linux-lts-saucy: DNE
vivid/ubuntu-core_linux-lts-saucy: DNE
vivid/stable-phone-overlay_linux-lts-saucy: DNE
wily_linux-lts-saucy: DNE
xenial_linux-lts-saucy: DNE
yakkety_linux-lts-saucy: DNE
devel_linux-lts-saucy: DNE

Patches_linux-lts-trusty:
upstream_linux-lts-trusty: released (3.13~rc5)
precise_linux-lts-trusty: not-affected (3.13.0-24.46~precise1)
trusty_linux-lts-trusty: DNE
trusty/esm_linux-lts-trusty: DNE
utopic_linux-lts-trusty: DNE
vivid_linux-lts-trusty: DNE
vivid/ubuntu-core_linux-lts-trusty: DNE
vivid/stable-phone-overlay_linux-lts-trusty: DNE
wily_linux-lts-trusty: DNE
xenial_linux-lts-trusty: DNE
yakkety_linux-lts-trusty: DNE
devel_linux-lts-trusty: DNE

Patches_linux-goldfish:
upstream_linux-goldfish: released (3.13~rc5)
precise_linux-goldfish: DNE
trusty_linux-goldfish: ignored
trusty/esm_linux-goldfish: DNE (trusty was ignored)
utopic_linux-goldfish: not-affected
vivid_linux-goldfish: not-affected
vivid/ubuntu-core_linux-goldfish: DNE
vivid/stable-phone-overlay_linux-goldfish: DNE
wily_linux-goldfish: not-affected
xenial_linux-goldfish: not-affected
yakkety_linux-goldfish: not-affected
devel_linux-goldfish: not-affected

Patches_linux-grouper:
upstream_linux-grouper: released (3.13~rc5)
precise_linux-grouper: DNE
trusty_linux-grouper: ignored
trusty/esm_linux-grouper: DNE (trusty was ignored)
utopic_linux-grouper: ignored (reached end-of-life)
vivid_linux-grouper: DNE
vivid/ubuntu-core_linux-grouper: DNE
vivid/stable-phone-overlay_linux-grouper: DNE
wily_linux-grouper: DNE
xenial_linux-grouper: DNE
yakkety_linux-grouper: DNE
devel_linux-grouper: DNE

Patches_linux-maguro:
upstream_linux-maguro: released (3.13~rc5)
precise_linux-maguro: DNE
trusty_linux-maguro: ignored
trusty/esm_linux-maguro: DNE (trusty was ignored)
utopic_linux-maguro: DNE
vivid_linux-maguro: DNE
vivid/ubuntu-core_linux-maguro: DNE
vivid/stable-phone-overlay_linux-maguro: DNE
wily_linux-maguro: DNE
xenial_linux-maguro: DNE
yakkety_linux-maguro: DNE
devel_linux-maguro: DNE

Patches_linux-mako:
upstream_linux-mako: released (3.13~rc5)
precise_linux-mako: DNE
trusty_linux-mako: ignored
trusty/esm_linux-mako: DNE (trusty was ignored)
utopic_linux-mako: not-affected
vivid_linux-mako: not-affected
vivid/ubuntu-core_linux-mako: DNE
vivid/stable-phone-overlay_linux-mako: not-affected
wily_linux-mako: not-affected
xenial_linux-mako: not-affected
yakkety_linux-mako: not-affected
devel_linux-mako: not-affected

Patches_linux-manta:
upstream_linux-manta: released (3.13~rc5)
precise_linux-manta: DNE
trusty_linux-manta: ignored
trusty/esm_linux-manta: DNE (trusty was ignored)
utopic_linux-manta: not-affected
vivid_linux-manta: not-affected
vivid/ubuntu-core_linux-manta: DNE
vivid/stable-phone-overlay_linux-manta: DNE
wily_linux-manta: not-affected
xenial_linux-manta: DNE
yakkety_linux-manta: DNE
devel_linux-manta: DNE

Patches_linux-flo:
upstream_linux-flo: released (3.13~rc5)
precise_linux-flo: DNE
trusty_linux-flo: ignored
trusty/esm_linux-flo: DNE (trusty was ignored)
utopic_linux-flo: not-affected
vivid_linux-flo: not-affected
vivid/ubuntu-core_linux-flo: DNE
vivid/stable-phone-overlay_linux-flo: not-affected
wily_linux-flo: not-affected
xenial_linux-flo: not-affected
yakkety_linux-flo: not-affected
devel_linux-flo: not-affected

Patches_linux-lts-utopic:
upstream_linux-lts-utopic: released (3.13~rc5)
precise_linux-lts-utopic: DNE
trusty_linux-lts-utopic: not-affected (3.16.0-25.33~14.04.2)
trusty/esm_linux-lts-utopic: DNE (trusty was not-affected [3.16.0-25.33~14.04.2])
utopic_linux-lts-utopic: DNE
vivid_linux-lts-utopic: DNE
vivid/ubuntu-core_linux-lts-utopic: DNE
vivid/stable-phone-overlay_linux-lts-utopic: DNE
wily_linux-lts-utopic: DNE
xenial_linux-lts-utopic: DNE
yakkety_linux-lts-utopic: DNE
devel_linux-lts-utopic: DNE

Patches_linux-lts-vivid:
upstream_linux-lts-vivid: released (3.13~rc5)
precise_linux-lts-vivid: DNE
trusty_linux-lts-vivid: not-affected (3.19.0-18.18~14.04.1)
trusty/esm_linux-lts-vivid: DNE (trusty was not-affected [3.19.0-18.18~14.04.1])
utopic_linux-lts-vivid: DNE
vivid_linux-lts-vivid: DNE
vivid/ubuntu-core_linux-lts-vivid: DNE
vivid/stable-phone-overlay_linux-lts-vivid: DNE
wily_linux-lts-vivid: DNE
xenial_linux-lts-vivid: DNE
yakkety_linux-lts-vivid: DNE
devel_linux-lts-vivid: DNE

Patches_linux-2.6:
upstream_linux-2.6: released (3.13~rc5)
precise_linux-2.6: DNE
trusty_linux-2.6: DNE
trusty/esm_linux-2.6: DNE
utopic_linux-2.6: DNE
vivid_linux-2.6: DNE
vivid/ubuntu-core_linux-2.6: DNE
vivid/stable-phone-overlay_linux-2.6: DNE
wily_linux-2.6: DNE
xenial_linux-2.6: DNE
yakkety_linux-2.6: DNE
devel_linux-2.6: DNE

Patches_linux-lts-wily:
upstream_linux-lts-wily: released (3.13~rc5)
precise_linux-lts-wily: DNE
trusty_linux-lts-wily: not-affected (4.2.0-18.22~14.04.1)
trusty/esm_linux-lts-wily: DNE (trusty was not-affected [4.2.0-18.22~14.04.1])
vivid_linux-lts-wily: DNE
vivid/ubuntu-core_linux-lts-wily: DNE
vivid/stable-phone-overlay_linux-lts-wily: DNE
wily_linux-lts-wily: DNE
xenial_linux-lts-wily: DNE
yakkety_linux-lts-wily: DNE
devel_linux-lts-wily: DNE

Patches_linux-raspi2:
upstream_linux-raspi2: released (3.13~rc5)
precise_linux-raspi2: DNE
trusty_linux-raspi2: DNE
trusty/esm_linux-raspi2: DNE
vivid_linux-raspi2: DNE
vivid/ubuntu-core_linux-raspi2: released (4.2.0-1014.21)
vivid/stable-phone-overlay_linux-raspi2: DNE
wily_linux-raspi2: not-affected (4.2.0-1008.12)
xenial_linux-raspi2: not-affected (4.2.0-1013.19)
yakkety_linux-raspi2: not-affected (4.4.0-1009.10)
devel_linux-raspi2: not-affected (4.8.0-1013.15)

Patches_linux-lts-xenial:
upstream_linux-lts-xenial: released (3.13~rc5)
precise_linux-lts-xenial: DNE
trusty_linux-lts-xenial: not-affected (4.4.0-13.29~14.04.1)
trusty/esm_linux-lts-xenial: not-affected (4.4.0-13.29~14.04.1)
vivid_linux-lts-xenial: DNE
vivid/ubuntu-core_linux-lts-xenial: DNE
vivid/stable-phone-overlay_linux-lts-xenial: DNE
wily_linux-lts-xenial: DNE
xenial_linux-lts-xenial: DNE
yakkety_linux-lts-xenial: DNE
devel_linux-lts-xenial: DNE

Patches_linux-snapdragon:
upstream_linux-snapdragon: released (3.13~rc5)
precise_linux-snapdragon: DNE
trusty_linux-snapdragon: DNE
trusty/esm_linux-snapdragon: DNE
vivid/ubuntu-core_linux-snapdragon: DNE
vivid/stable-phone-overlay_linux-snapdragon: DNE
wily_linux-snapdragon: DNE
xenial_linux-snapdragon: not-affected (4.4.0-1012.12)
yakkety_linux-snapdragon: not-affected (4.4.0-1012.12)
devel_linux-snapdragon: not-affected (4.4.0-1029.32)

Patches_linux-aws:
upstream_linux-aws: released (3.13~rc5)
precise_linux-aws: DNE
trusty_linux-aws: not-affected (4.4.0-1002.2)
trusty/esm_linux-aws: not-affected (4.4.0-1002.2)
vivid/ubuntu-core_linux-aws: DNE
vivid/stable-phone-overlay_linux-aws: DNE
xenial_linux-aws: not-affected (4.4.0-1001.10)
esm-infra/xenial_linux-aws: not-affected (4.4.0-1001.10)
yakkety_linux-aws: DNE
devel_linux-aws: DNE

Patches_linux-hwe-edge:
upstream_linux-hwe-edge: released (3.13~rc5)
precise_linux-hwe-edge: DNE
trusty_linux-hwe-edge: DNE
trusty/esm_linux-hwe-edge: DNE
vivid/ubuntu-core_linux-hwe-edge: DNE
vivid/stable-phone-overlay_linux-hwe-edge: DNE
xenial_linux-hwe-edge: not-affected (4.8.0-36.36~16.04.1)
esm-infra/xenial_linux-hwe-edge: not-affected (4.8.0-36.36~16.04.1)
yakkety_linux-hwe-edge: DNE
devel_linux-hwe-edge: DNE

Patches_linux-hwe:
upstream_linux-hwe: released (3.13~rc5)
precise_linux-hwe: DNE
trusty_linux-hwe: DNE
trusty/esm_linux-hwe: DNE
vivid/ubuntu-core_linux-hwe: DNE
vivid/stable-phone-overlay_linux-hwe: DNE
xenial_linux-hwe: not-affected (4.8.0-36.36~16.04.1)
esm-infra/xenial_linux-hwe: not-affected (4.8.0-36.36~16.04.1)
yakkety_linux-hwe: DNE
devel_linux-hwe: DNE

Patches_linux-gke:
upstream_linux-gke: released (3.13~rc5)
precise_linux-gke: DNE
trusty_linux-gke: DNE
trusty/esm_linux-gke: DNE
vivid/ubuntu-core_linux-gke: DNE
vivid/stable-phone-overlay_linux-gke: DNE
xenial_linux-gke: not-affected (4.4.0-1003.3)
yakkety_linux-gke: DNE
devel_linux-gke: DNE