CVE-2016-4578

Publication date 23 May 2016

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

sound/core/timer.c in the Linux kernel through 4.6 does not initialize certain r1 data structures, which allows local users to obtain sensitive information from kernel stack memory via crafted use of the ALSA timer interface, related to the (1) snd_timer_user_ccallback and (2) snd_timer_user_tinterrupt functions.

From the Ubuntu Security Team

Kangjie Lu discovered an information leak in the timer handling implementation in the Advanced Linux Sound Architecture (ALSA) subsystem of the Linux kernel. A local attacker could use this to obtain potentially sensitive information from kernel memory.

Read the notes from the security team

Status

Package Ubuntu Release Status
linux 17.04 zesty
Not affected
16.10 yakkety
Not affected
16.04 LTS xenial
Fixed 4.4.0-28.47
15.10 wily
Fixed 4.2.0-41.48
14.04 LTS trusty
Fixed 3.13.0-91.138
12.04 LTS precise
Fixed 3.2.0-105.146
linux-armadaxp 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty Not in release
12.04 LTS precise
Fixed 3.2.0-1668.93
linux-aws 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
12.04 LTS precise Not in release
linux-flo 17.04 zesty Not in release
16.10 yakkety Ignored end of life
16.04 LTS xenial Not in release
15.10 wily Ignored end of life
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
linux-gke 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
linux-goldfish 17.04 zesty Ignored end of life
16.10 yakkety Ignored end of life
16.04 LTS xenial Not in release
15.10 wily Ignored end of life
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
linux-grouper 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
linux-hwe 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
linux-hwe-edge 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
linux-linaro-omap 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life
linux-linaro-shared 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life
linux-linaro-vexpress 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life
linux-lts-quantal 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life
linux-lts-raring 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life
linux-lts-saucy 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life
linux-lts-trusty 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty Not in release
12.04 LTS precise
Fixed 3.13.0-91.138~precise1
linux-lts-utopic 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty
Fixed 3.16.0-76.98~14.04.1
12.04 LTS precise Not in release
linux-lts-vivid 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty
Fixed 3.19.0-64.72~14.04.1
12.04 LTS precise Not in release
linux-lts-wily 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty
Fixed 4.2.0-41.48~14.04.1
12.04 LTS precise Not in release
linux-lts-xenial 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty
Fixed 4.4.0-28.47~14.04.1
12.04 LTS precise Not in release
linux-maguro 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
linux-mako 17.04 zesty Not in release
16.10 yakkety Ignored end of life
16.04 LTS xenial Not in release
15.10 wily Ignored end of life
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
linux-manta 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Ignored end of life
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
linux-qcm-msm 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored end of life
linux-raspi2 17.04 zesty
Not affected
16.10 yakkety
Not affected
16.04 LTS xenial
Fixed 4.4.0-1016.22
15.10 wily
Fixed 4.2.0-1033.43
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
linux-snapdragon 17.04 zesty
Not affected
16.10 yakkety
Not affected
16.04 LTS xenial
Fixed 4.4.0-1019.22
15.10 wily Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
linux-ti-omap4 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
15.10 wily Not in release
14.04 LTS trusty Not in release
12.04 LTS precise
Fixed 3.2.0-1483.110

Notes

jdstrand

android kernels (flo, goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 14.10 and earlier preview kernels linux-lts-saucy no longer receives official support linux-lts-quantal no longer receives official support

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
linux

Severity score breakdown

Parameter Value
Base score 5.5 · Medium
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-3020-1
    • Linux kernel (Vivid HWE) vulnerabilities
    • 27 June 2016
    • USN-3018-2
    • Linux kernel (Trusty HWE) vulnerabilities
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    • USN-3018-1
    • Linux kernel vulnerabilities
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    • USN-3021-2
    • Linux kernel (OMAP4) vulnerabilities
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    • USN-3021-1
    • Linux kernel vulnerabilities
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    • USN-3019-1
    • Linux kernel (Utopic HWE) vulnerabilities
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    • USN-3017-3
    • Linux kernel (Wily HWE) vulnerabilities
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    • USN-3016-1
    • Linux kernel vulnerabilities
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    • USN-3016-3
    • Linux kernel (Qualcomm Snapdragon) vulnerabilities
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    • USN-3016-4
    • Linux kernel (Xenial HWE) vulnerabilities
    • 27 June 2016
    • USN-3016-2
    • Linux kernel (Raspberry Pi 2) vulnerabilities
    • 27 June 2016
    • USN-3017-1
    • Linux kernel vulnerabilities
    • 27 June 2016
    • USN-3017-2
    • Linux kernel (Raspberry Pi 2) vulnerabilities
    • 27 June 2016

Other references