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CVE-2016-2550

Status Candidate

Overview

The Linux kernel before 4.5 allows local users to bypass file-descriptor limits and cause a denial of service (memory consumption) by leveraging incorrect tracking of descriptor ownership and sending each descriptor over a UNIX socket before closing it. NOTE: this vulnerability exists because of an incorrect fix for CVE-2013-4312.

Related Files

Ubuntu Security Notice USN-2948-2
Posted Apr 11, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2948-2 - USN-2948-1 fixed vulnerabilities in the Ubuntu 14.10 Linux kernel backported to Ubuntu 14.04 LTS. An incorrect reference counting fix in the radeon driver introduced a regression that could cause a system crash. This update fixes the problem. Various other issues were also addressed.

tags | advisory, kernel, vulnerability
systems | linux, ubuntu
advisories | CVE-2015-7566, CVE-2015-7833, CVE-2015-8812, CVE-2016-0723, CVE-2016-2085, CVE-2016-2550, CVE-2016-2782, CVE-2016-2847
SHA-256 | 275b81339417c812197f69eec7beeedc365d877e550b1d20ee2bd408be49fb77
Ubuntu Security Notice USN-2947-1
Posted Apr 6, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2947-1 - Ralf Spenneberg discovered that the usbvision driver in the Linux kernel did not properly sanity check the interfaces and endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-7833, CVE-2015-8812, CVE-2016-2085, CVE-2016-2383, CVE-2016-2550, CVE-2016-2847
SHA-256 | 1589a71a5392734b1ae81742ea08c3d1505de7730a5f381c44076a2fbb5cda36
Ubuntu Security Notice USN-2946-2
Posted Apr 6, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2946-2 - Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux Extended Verification Module (EVM). An attacker could use this to affect system integrity. David Herrmann discovered that the Linux kernel incorrectly accounted file descriptors to the original opener for in-flight file descriptors sent over a unix domain socket. A local attacker could use this to cause a denial of service (resource exhaustion). Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, unix, ubuntu
advisories | CVE-2015-8812, CVE-2016-2085, CVE-2016-2550, CVE-2016-2847
SHA-256 | 0038e1460e63ff5cc6aaf80a71168ed50dafde78ce37b3363aa006a996681a76
Ubuntu Security Notice USN-2949-1
Posted Apr 6, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2949-1 - Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux Extended Verification Module (EVM). An attacker could use this to affect system integrity. David Herrmann discovered that the Linux kernel incorrectly accounted file descriptors to the original opener for in-flight file descriptors sent over a unix domain socket. A local attacker could use this to cause a denial of service (resource exhaustion). Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, unix, ubuntu
advisories | CVE-2015-8812, CVE-2016-2085, CVE-2016-2550, CVE-2016-2847
SHA-256 | 0400bb0d8a6dc0fa5b0e9e74b415c869ca8984e6ffeaccdb1937b1486387cb3a
Ubuntu Security Notice USN-2948-1
Posted Apr 6, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2948-1 - Ralf Spenneberg discovered that the USB driver for Clie devices in the Linux kernel did not properly sanity check the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). Ralf Spenneberg discovered that the usbvision driver in the Linux kernel did not properly sanity check the interfaces and endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). Various other issues were also addressed.

tags | advisory, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2015-7566, CVE-2015-7833, CVE-2015-8812, CVE-2016-0723, CVE-2016-2085, CVE-2016-2550, CVE-2016-2782, CVE-2016-2847
SHA-256 | f3cae25b14e5e6dc21f92189550892543b26dc0cb3d6486d3fef87657d9a3007
Ubuntu Security Notice USN-2947-3
Posted Apr 6, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2947-3 - Ralf Spenneberg discovered that the usbvision driver in the Linux kernel did not properly sanity check the interfaces and endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-7833, CVE-2015-8812, CVE-2016-2085, CVE-2016-2383, CVE-2016-2550, CVE-2016-2847
SHA-256 | 8e332a027893fa2b8bfdfdd28766726d47bc3892017b1859881263fdd0532d37
Ubuntu Security Notice USN-2946-1
Posted Apr 6, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2946-1 - Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux Extended Verification Module (EVM). An attacker could use this to affect system integrity. David Herrmann discovered that the Linux kernel incorrectly accounted file descriptors to the original opener for in-flight file descriptors sent over a unix domain socket. A local attacker could use this to cause a denial of service (resource exhaustion). Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, unix, ubuntu
advisories | CVE-2015-8812, CVE-2016-2085, CVE-2016-2550, CVE-2016-2847
SHA-256 | c6cb3ff3dd5bc15eed99776afa7a96f21344d3b8675e42dfbe88b47003dcedc5
Ubuntu Security Notice USN-2947-2
Posted Apr 6, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2947-2 - Ralf Spenneberg discovered that the usbvision driver in the Linux kernel did not properly sanity check the interfaces and endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-7833, CVE-2015-8812, CVE-2016-2085, CVE-2016-2383, CVE-2016-2550, CVE-2016-2847
SHA-256 | a1cd9bf0ef18c2c6d6e9125dc56451016c28dacccc9581b62fb421f6ee77a750
Debian Security Advisory 3503-1
Posted Mar 4, 2016
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3503-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service, information leak or data loss.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, debian
advisories | CVE-2013-4312, CVE-2015-7566, CVE-2015-8767, CVE-2015-8785, CVE-2015-8812, CVE-2015-8816, CVE-2015-8830, CVE-2016-0723, CVE-2016-0774, CVE-2016-2069, CVE-2016-2384, CVE-2016-2543, CVE-2016-2544, CVE-2016-2545, CVE-2016-2546, CVE-2016-2547, CVE-2016-2548, CVE-2016-2549, CVE-2016-2550
SHA-256 | 25d671ba26bfc929fa9034f00895f1f88acf0c87420ac9187d367f3130e8b078
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