CVE-2015-7550 (retired)

Priority
Description
The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel
before 4.3.4 does not properly use a semaphore, which allows local users to
cause a denial of service (NULL pointer dereference and system crash) or
possibly have unspecified other impact via a crafted application that
leverages a race condition between keyctl_revoke and keyctl_read calls.
Ubuntu-Description
It was discovered that the Linux kernel keyring subsystem contained a race
between read and revoke operations. A local attacker could use this to
cause a denial of service (system crash).
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
Package
Source: linux (LP Ubuntu Debian)
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):released (3.2.0-99.139)
Ubuntu 14.04 LTS (Trusty Tahr):released (3.13.0-79.123)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-2.16)
Patches:
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2Fixed by b4a1b4f5047e4f54e194681125c74c0aa64d637d
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE (precise was released [3.2.0-1662.86])
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):not-affected (4.4.0-1002.2)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1001.10)
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored
Ubuntu 16.04 LTS (Xenial Xerus):ignored (abandoned)
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1003.3)
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored
Ubuntu 16.04 LTS (Xenial Xerus):ignored (abandoned)
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.8.0-36.36~16.04.1)
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.8.0-36.36~16.04.1)
Package
linux-krillin:ignored (was needed now end-of-life)
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE (precise was ignored [abandoned])
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE (precise was ignored [abandoned])
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE (precise was ignored [abandoned])
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE (precise was ignored [end-of-life])
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Patches:
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE (precise was ignored [end-of-life])
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE (precise was ignored [end-of-life])
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):released (3.13.0-79.123~precise1)
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):released (3.16.0-60.80~14.04.1)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):released (3.19.0-51.57~14.04.1)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):released (4.2.0-27.32~14.04.1)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):not-affected (4.4.0-13.29~14.04.1)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored
Ubuntu 16.04 LTS (Xenial Xerus):ignored (abandoned)
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):ignored
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE (precise was ignored [abandoned])
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1003.4)
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1012.12)
Package
Upstream:released (4.4~rc8)
Ubuntu 12.04 ESM (Precise Pangolin):DNE (precise was released [3.2.0-1477.100])
Ubuntu 14.04 LTS (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
linux-vegetahd:ignored (was needed now end-of-life)
More Information

Updated: 2019-03-26 12:16:47 UTC (commit ccdecfcf0fead22bd291e5f4ea745a46872dcb15)